US Pat. No. 9,194,897

ELECTRONIC WATT-HOUR METER AND ELECTRONIC WATT-HOUR MEASURING METHOD

Samsung Electro-Mechanics...

1. An electronic watt-hour meter, comprising:
a first multiplexer receiving a plurality of detected currents detected in respective polyphase power lines in parallel, to
output the received detection currents in series;

a first signal converter converting a signal output from the first multiplexer into a digital signal;
a first demultiplexer outputting a serial input from the first signal converter in parallel;
a line voltage generator generating a plurality of line voltages from the plurality of detected voltages detected in the respective
polyphase power lines, the plurality of line voltages including a reduced phase interference signal component and a reduced
random noise signal component;

a second multiplexer receiving the plurality of line voltages in parallel, to output the received line voltages in series;
a second signal converter converting a signal output from the second multiplexer into a digital signal;
a second demultiplexer outputting a serial input from the second signal converter in parallel; and
a calculating unit calculating a power value from a signal output from the first demultiplexer and a signal output from the
second demultiplexer.

US Pat. No. 9,329,095

METHOD FOR EVALUATING PRESTRESSING FORCE OF BONDED TENDON USING VELOCITY OF STRESS WAVES CAUSED BY IMPACT

Korea Electric Power Corp...

1. A method for evaluating prestressing force of a bonded tendon, the method comprising:
striking a prestressing strand of a bonded tendon with an impact hammer;
measuring an acceleration response signal from the prestressing strand using an accelerometer, and receiving the acceleration
response signal with a data logger; and

calculating stress wave velocity based on the acceleration response signal received by the data logger, and evaluating prestressing
force of the bonded tendon, based on the calculated stress wave velocity, using a controller,

wherein the prestressing force of the bonded tendon is evaluated based on the acceleration response signal using the following
formula:


where V is the stress wave velocity of acceleration response signal,
?c is density of concrete,

?c is compressive strength of concrete,

? is prestressing stress of the bonded tendon,
?s is tensile strength of steel wires, and

k1, k7, k3, k4, and k5 are constants.

US Pat. No. 9,261,420

DIGITAL DEVICE AND METHOD FOR MEASURING THE AXIAL LOAD OF A TORQUE-SHEAR-TYPE HIGH STRENGTH BOLT

Korea Electric Power Corp...

1. A digital device for measuring an axial load of a torque-shear-type high strength bolt, comprising:
a main body connected to an electromotive wrench fastening a torque-shear-type high strength bolt;
a measuring unit disposed in the main body and measuring an axial load of the torque-shear-type high strength bolt;
a power supply formed in the main body and comprising a power lead-in portion for receiving power from outside and a power
lead-out portion for supplying the power to the electromotive wrench; and

a display unit displaying a measuring result of the axial load of the torque-shear-type high strength bolt measured by the
measuring unit,

wherein the measuring unit comprises:
a current detector for detecting alternating current (AC) supplied to the electromotive wrench through a current sensor using
a DC voltage of 0 to 5V;

a sampling unit for performing sampling within a preset range with respect to the electric current detected by the current
detector; and

a calculation unit for analyzing a data value sampled by the sampling unit based on an axial load calculation algorithm and
calculating the axial load.

US Pat. No. 9,461,871

CLIENT SUITABILITY TEST APPARATUS AND METHOD FOR A SUBSTATION AUTOMATING SYSTEM

Korea Electric Power Corp...

1. A client suitability test method for a substation automation system, with respect to IEC 61850 communication service between
virtual Intelligent Electronic Devices (IEDs) corresponding to a plurality of IEDs and a client, the method comprising:
generating a suitability test procedure model for testing suitability of the client using one or more test models that are
selected from among a plurality of test models;

invoking the suitability test procedure model, and then conducting a test for the suitability of the client in accordance
with content of the suitability test procedure model;

capturing and analyzing a communication request from the client and a communication packet of a communication response from
a selected virtual IED during the conducting of the test for the suitability of the client;

checking whether the IEC 61850 communication service is the communication service requested by the client; and
comparing the communication response of the virtual IED with settings of the test models, and then judging the test for the
suitability of the client based on test judgment conditions of the test procedure model,

wherein generating the suitability test procedure model comprises:
inputting and editing content of the selected test models;
automatically arranging the selected test models, and modifying relative locations of the test models or deleting test models
that are unnecessary for the corresponding suitability test procedure; and

connecting the arranged test models with lines,
wherein connecting the arranged test models with the lines comprises setting a number of repetitions of the test procedure
model and setting a repetitive section between the test models,

wherein the selected test models include an introduction test model including a guidance on an operation of the client and
the virtual IED through the test or a description during the test in text form,

wherein conducting a test for the suitability of the client in accordance with the content of the suitability test procedure
model comprises displaying the guidance or the description to a tester.

US Pat. No. 9,397,790

SYSTEM AND METHOD FOR UNIDIRECTIONAL DATA TRANSMISSION

KOREA ELECTRIC POWER CORP...

1. A system for unidirectional data transmission, comprising:
a transmitter that is connected to a first network having a higher security level, sends data coming from the first network
through a data transmission line to a second network having a lower security level, and receives a data verification result
(DVR) corresponding to the data through a DVR transmission line; and

a receiver that is connected to the second network having a lower security level, receives data from the transmitter through
the data transmission line and forwards the received data to the second network, and sends a DVR corresponding to the received
data through the DVR transmission line.

US Pat. No. 9,138,682

CARBON DIOXIDE ABSORBENT FOR EXHAUST GAS, AND PREPARATION METHOD THEREOF

KOREA ELECTRIC POWER CORP...

1. A method of preparing a CO2 absorbent for exhaust gas, comprising:
preparing a slurry using solid materials comprising an active component at 5 to 70 wt %, a support at 5 to 70 wt %, an inorganic
binder at 5 to 70 wt % and a recycling improver at 5 to 70 wt %, based on the total weight of the slurry;

primarily preparing an absorbent by drying the prepared slurry in a spray drier; and
preparing a final absorbent by drying and calcinating the primarily prepared absorbent,
wherein the active component is potassium carbonate or potassium bicarbonate,
wherein the support is alumina,
wherein the inorganic binder is cement, clay, or ceramic,
wherein the recycling improver is hydrotalcite, and
wherein the absorbent material molded in the preparation of the final absorbent has a recycling capability of 70 to 100%.

US Pat. No. 9,962,918

PRODUCTION METHOD FOR A SUPPORT TYPE COATING MEMBRANE USING TAPE CASTING

KOREA ELECTRIC POWER CORP...

1. A method of manufacturing a support type coating membrane, comprising the steps of:forming a pre heat-treated support;
forming a green sheet on a release film for a coating membrane;
attaching the green sheet onto the pre heat-treated support directly to form a laminate including the release film, green sheet and support;
removing the release film from the laminate to form a combination of the support and green sheet; and
co-sintering the combination,
wherein the pre heat-treated support is an anode or cathode,
wherein the coating membrane is an electrolyte layer or separation membrane, and
wherein, in the step of forming the green sheet, the green sheet is formed by tape-casting a binder-containing ceramic slurry on the release film,
wherein, in the step of forming the support, the support is formed by molding and heat-treating binder-containing powder for support, and is a pre-sintered porous support having a porosity of 5 to 70%,
wherein, in the step of forming the combination of the support and green sheet by removing the release film, the green sheet is attached onto the support using a pressurization-type or depressurization-type attaching apparatus, and then the release film is removed therefrom,
wherein the green sheet is attached to the support by generating a pressure difference between both sides of the support using the pressurization-type or depressurization-type attaching apparatus, and
wherein the release film is separated by generating the pressure difference between both sides of the support using the pressurization-type or depressurization-type attaching apparatus.
US Pat. No. 9,844,766

SOLID CARBON DIOXIDE ABSORBENT INCLUDING AMINE OR A COMPOUND THEREOF FOR USE IN THE CAPTURING PROCESS OF DRY CARBON DIOXIDE, AND METHOD FOR MANUFACTURING SAME

KOREA ELECTRIC POWER CORP...

1. A method for manufacturing a carbon dioxide absorbent, the method comprising the steps of:
(A) preparing a slurry composition including a carrier composition containing a support and an inorganic binder, and a solvent;
(B) preparing solid particles by spray drying the prepared slurry composition;
(C) manufacturing a carrier by dry calcining the solid particles; and
(D) receiving an amine compound into pores of the manufactured carrier.

US Pat. No. 9,110,110

BIDIRECTIONAL 3 PHASE POWER METER FOR COMPENSATING REVERSE LOAD FLOW AND METHOD FOR METERING THEREBY

KOREA ELECTRIC POWER CORP...

1. A bidirectional 3 phase power meter for compensating reverse load flow comprising:
a voltage/current detecting unit detecting a voltage per phase or current per phase;
a bidirectional measuring unit measuring power receiving direction or power transmitting direction by calculating phase difference
per phase using the voltage per phase or current per phase value and calculating neutral line current;

an instantaneous power calculating unit calculating instantaneous power by using the voltage per phase or current per phase
and the phase difference per phase;

a reverse load flow determining unit determining occurrence of reverse load flow through the phase difference per phase and
the neutral line current calculated from the bidirectional measuring unit;

a reverse load flow calculating unit calculating reverse load flow power generated when the reverse load flow determining
unit determines occurrence of reverse load flow;

an actual power usage calculating unit calculating actual power usage by calculating instantaneous compensation power per
phase and 3 phase instantaneous compensation power using the instantaneous power and the reverse load flow power;

a power transmitting/receiving direction determining unit determining active power or reactive power of the actual power usage;
a power meter value storing unit compensating the amount of active power and reactive power calculated from the power transmitting/receiving
direction determining unit and accumulating and storing the result; and

an apparent power/power factor calculating unit calculating apparent power and power factor using the active power and reactive
power stored at the power meter value storing unit and the amount of accumulated power,

wherein the reverse load flow determining unit further comprises:
a negative-sequence selecting unit selecting a negative-sequence from a positive-sequence and a negative-sequence;
a current intensity comparing unit comparing a negative-sequence intensity outputted from the negative-sequence selecting
unit with a zero-sequence intensity;

a plurality of voltage phase difference comparing units comparing phase difference of voltages per phase;
a first AND gate comparing outputs of the voltage phase difference comparing units; and
a second AND gate comparing outputs of the current intensity comparing unit and the first AND gate.

US Pat. No. 9,054,503

SUPPORT APPARATUS FOR INSULATOR ARM

KOREA ELECTRIC POWER CORP...

1. A support apparatus for an insulator arm for a compact pylon, comprising:
a first key cap connector and a second key cap connector coupled, respectively, with a first insulator arm and a second insulator
arm that are divided, the first key cap connector and the second key cap connector each having a coupling portion;

a Y-shaped saddle coupled with the first key cap connector and the second key cap connector through the coupling portions;
and

an insulator arm support metal fitting comprising a support rod connected with the Y-shaped saddle and a support-rod-connecting
insulator connected with the support rod, coupled with the Y-shaped saddle.

US Pat. No. 9,658,272

METHOD AND DEVICE FOR DETERMINING THE DEFECT TYPE OF A PARTIAL DISCHARGE

KOREA ELECTRIC POWER CORP...

1. A method for determining a type of defect in partial discharge, comprising:
forming a virtual space corresponding to n parameters generated based on defect types causing partial discharge, and arranging
defect type models in the virtual space by combining parameter values of the n parameters for each of defect types;

extracting parameter values corresponding to the n parameters based on a generated partial discharge signal when a partial
discharge signal event occurs, combining the parameter values, and then arranging a partial discharge model in the virtual
space;

comparing pieces of location information of the defect type models with location information of the partial discharge model
and then calculating distance values between the defect type models and the partial discharge model;

calculating probability values of the defect types for the partial discharge signal event from the distance values calculated
at calculating;

determining, using a defect type determination unit, a type of defect in the partial discharge signal event based on the probability
values of the defect types for the partial discharge signal event; and

receiving neural network-based defect type determination results for the defect types and the partial discharge signal event,
wherein determining the type of defect is configured to determine the type of defect in the partial discharge signal event
by combining the probability values of the defect types with probability values acquired from the neural network-based defect
type determination results, and

wherein determining the type of defect is further configured to assign different weights to the probability values of the
defect types and to the probability values acquired from the neural network-based defect type determination results.

US Pat. No. 9,393,679

WRENCH SOCKET FOR AUTOMATICALLY MARKING HIGH TENSION BOLT, AND METHOD FOR TIGHTENING HIGH TENSION BOLT USING SAME

KOREA ELECTRIC POWER CORP...

1. A wrench socket comprising:
a first housing making partial contact with a nut;
a second housing connected to the first housing and coupled to a handle to apply force to the nut;
a marker disposed in the first and second housings for marking a high tension bolt, the nut, and a washer according to a height
of the high tension bolt;

a gauge disposed in the first and second housings for making contact with the high tension bolt and reciprocating according
to a position of the high tension bolt;

an elastic part configured to apply elastic force to the gauge according to a position of the gauge; and
a position detector disposed in the second housing to detect the position of the gauge,
wherein if the position of the gauge is detected by the position detector as being varied by a first length, the marker marks
the high tension bolt, the nut, and the washer.

US Pat. No. 9,347,977

CONNECTION ERROR DETECTING APPARATUS AND METHOD WHICH DETECT A CONNECTION ERROR IN A SMART METER

KOREA ELECTRIC POWER CORP...

1. A connection error detection device for detecting a connection error for each rating in a smart meter, comprising:
a parameter calculation unit configured to calculate connection error detection parameters including voltage root-mean-square
(RMS) values, current RMS values, active energy values and reactive energy values for three phases; and

a connection error determination unit configured to set a connection error detection criterion for detecting a connection
error for each rating in the smart meter, and to detect the connection error for each rating by determining whether any one
of the connection error detection parameters meets the connection error detection criterion,

wherein the connection error detection criterion is set to any one of a case where active energy values for any one or more
phases are measured in a negative direction, a case where a voltage RMS value for any one phase is a first percentage or less
or a second percentage or more of an average rated voltage for remaining two phases, the second percentage being higher than
the first percentage, and a case where active and reactive energy values for any one or more phases are all measured in a
positive direction.

US Pat. No. 9,664,176

METHOD OF AUTOMATICALLY CALCULATING POWER CURVE LIMIT FOR POWER CURVE MONITORING OF WIND TURBINE

Korea Electric Power Corp...

1. A method of automatically calculating power curve limits for power curve monitoring of a wind turbine, comprising:
a first operation of classifying input data of wind power generation through variable speed bins by an input data classification
unit;

a second operation of calculating a first mean value and a standard deviation of power for each bin for the classified input
data by a power calculation unit;

a third operation of estimating a power curve for the first mean value of power for each bin by a power curve estimation unit;
a fourth operation of searching for accurate power curve limits while shifting the estimated power curve by a limit search
unit; and

a fifth operation of setting the input data between the accurate power curve limits as new input data by a data extraction
unit.

US Pat. No. 9,594,389

DEVICE AND METHOD FOR AUTOMATICALLY COORDINATING PROTECTION DEVICE OF SMART POWER DISTRIBUTION MANAGEMENT SYSTEM

KOREA ELECTRIC POWER CORP...

1. An apparatus for automatically coordinating protection devices of a smart power distribution management system, the system
including a plurality of measuring devices, a plurality of distributed power sources, a plurality of protection devices, a
plurality of automatic switches, and a main server, comprising:
a processor including:
a status information acquisition unit for acquiring status information of a distribution system from the plurality of measuring
devices;

a topology generation unit for generating topological information of the distribution system based on the acquired status
information of the distribution system;

a communication setting unit for setting one or more communication target devices for transmitting/receiving data when an
event occurs in the distribution system, for each of the plurality of protection devices based on the generated topological
information;

a power flow calculation unit for calculating a system power flow including a power flow direction of the distribution system,
based on the generated topological information;

a fault current calculation unit for calculating a fault current caused when a fault occurs in the distribution system, based
on the generated topological information; and

a correction value generation unit for generating protection coordination correction values including the set communication
target devices, the calculated system power flow, and the calculated fault current, for each of the plurality of protection
devices,

wherein the communication setting unit separates the plurality of protection devices into corresponding areas based on the
topological information, and sets left and right communication target devices for each of the plurality of protection devices.

US Pat. No. 9,590,426

SYSTEM AND METHOD FOR MANAGING A POWER DISTRIBUTION SYSTEM

KOREA ELECTRIC POWER CORP...

1. A system for managing a power distribution system, the power distribution system comprising a plurality of protective devices
provided on lines between a substation, a transformer and a load, and a plurality of distribution automation terminal devices
installed in the respective protective devices, the system comprising:
an SOTS terminal collecting field measurement data measured by the distribution automation terminal devices at a same time,
and an event signal generated from the distribution automation terminal devices;

a DCP server receiving the field measurement data and the event signal from the SOTS terminal, receiving a control command
for the distribution automation terminal devices, and transmitting the control command to corresponding distribution automation
terminal devices;

a main server detecting protection coordination correction values of the protective devices for system protection and detecting
a fault section of the power distribution system based on the event signal received from the DCP server, the main server conducting
a real time system analysis using the field measurement data, and transmitting control information including at least one
among the detected protection coordination correction values, the fault section and the system analysis information to the
DCP server; and

a database storing and managing at least one among the field measurement data, the event signal, the protection coordination
correction values, the fault section and the system analysis information that are received from the main server.

US Pat. No. 9,671,440

METHOD AND DEVICE FOR DETECTING ZERO PHASE COMPONENT

Korea Electric Power Corp...

1. A device for detecting a zero phase component, comprising:
a meter chip of a sequential sampling method;
a data acquiring unit configured to acquire a plurality of sequential data values of each of a plurality of phases from the
meter chip;

a zero phase current value calculating unit configured to calculate a zero phase current value based on the acquired plurality
of sequential data values of each of a plurality of phases; and

a monitoring unit configured to determine whether the calculated zero phase current value exceeds a predetermined reference
value and then to generate event information corresponding thereto when the calculated zero phase current value exceeds the
reference value,

wherein the zero phase current value calculating unit:
extracts a number of instantaneous current values for fault detection corresponding to a number of the phases from the acquired
plurality of sequential data values of each of a plurality of phases,

calculates first, second, and third instantaneous current values for fault detection when the plurality of phases are three
phases, and

calculates:
the first instantaneous current value for fault detection by summing a first instantaneous current value of a first phase
of the three phases a second instantaneous current value of a second phase of the three phases and a third instantaneous current
value of a third phase of the three phases,

the second instantaneous current value for fault detection by summing a first instantaneous current value of the second phase
a second instantaneous current value of the third phase and a third instantaneous current value of the first phase, and

the third instantaneous current value for fault detection by summing a first instantaneous current value of the third phase
a second instantaneous current value of the first phase and a third instantaneous current value of the second phase.

US Pat. No. 9,766,283

TRANSFORMER FAULT DETECTION APPARATUS AND METHOD

KOREA ELECTRIC POWER CORP...

1. A transformer fault detection apparatus, comprising:
an integrated sensor unit for sensing signals through a plurality of sensors located on each of an upper drain valve and a
lower drain valve present in a transformer;

a first possible discharge area calculation unit for calculating a first possible discharge area estimated to be a location
of a partial discharge source of the transformer, based on arrival times of signals sensed by different sensors located on
the upper drain valve;

a second possible discharge area calculation unit for calculating a second possible discharge area estimated to be the location
of the partial discharge source of the transformer, based on arrival times of signals sensed by different sensors located
on the lower drain valve;

a final possible discharge area calculation unit for calculating a final possible discharge area estimated to be the location
of the partial discharge source of the transformer, based on an overlapping area between the first possible discharge area
and the second possible discharge area; and

a partial discharge source location estimation unit for estimating the location of the partial discharge source from the final
possible discharge area, based on a difference between arrival times of an identical signal that has reached a sensor located
on the upper drain valve and a sensor located on the lower drain valve,

wherein the first possible discharge area calculation unit calculates a three-dimensional (3D) first possible discharge area,
based on a difference between arrival times of a first electromagnetic signal sensed by a first electromagnetic sensor located
on the upper drain valve and a first ultrasonic signal sensed by a first ultrasonic sensor located on the upper drain valve,

wherein the second possible discharge area calculation unit calculates a 3D second possible discharge area, based on a difference
between arrival times of a second electromagnetic signal sensed by a second electromagnetic sensor located on the lower drain
valve and a second ultrasonic signal sensed by a second ultrasonic sensor located on the lower drain valve,

wherein the final possible discharge area calculation unit calculates a two-dimensional (2D) final possible discharge area
generated by causing a point, at which the 3D first possible discharge area and the 3D second possible discharge area intersect
each other, to be included in a circumference.

US Pat. No. 9,692,311

HIGH-VOLTAGE DIRECT CURRENT CONVERTER INCLUDING A 12-PULSE DIODE RECITIFIER CONNECTED IN SERIES WITH A VOLTAGE-SOURCE CONVERTER

KOREA ELECTRIC POWER CORP...

1. A converter for high voltage direct current transmission, comprising:
a 12-pulse diode rectifier including two three-phase full bridge diode rectifiers connected in series and rectifying AC power
input from an offshore point of common coupling (PCC) into 12-pulse power; and

a voltage-source converter connected in series to a lower end of the 12-pulse diode rectifier,
wherein the voltage-source converter is a multi-phase converter in which multiple phases are coupled in parallel with each
other at the lower end of the 12-pulse diode rectifier, and

wherein the voltage-source converter controls voltage of AC power input from the offshore PCC and DC link voltage of the voltage-source
converter.

US Pat. No. 9,688,558

APPARATUS FOR CONCENTRATION REACTION OF CARBON DIOXIDE USING MAGNESIUM IONS IN SEAWATER, AND METHOD FOR SEQUESTRATING CARBON DIOXIDE IN OCEAN USING SAME

KOREA ELECTRIC POWER CORP...

1. A carbon dioxide concentration reactor using magnesium ions in seawater, wherein calcium oxide (CaO) or alkaline waste
containing calcium oxide is injected into the seawater to allow the calcium oxide to react with magnesium ions present in
the seawater to form magnesium hydroxide (Mg(OH)2) for precipitation, after the precipitation of magnesium hydroxide, a supernatant of the seawater is removed and a lower
layer liquid of the seawater containing the magnesium hydroxide and carbon dioxide are allowed to react with each other to
convert carbon dioxide into concentrated seawater containing bicarbonate ions (HCO3?) having a higher concentration than in a natural state,
wherein the concentration reactor comprises:
an alkaline waste supply unit supplying the calcium oxide or alkaline waste containing calcium oxide;
a seawater inflow unit for feeding the seawater;
a multi-stage reactor system supplied with the calcium oxide and seawater and allowing the calcium oxide and seawater to react
with each other;

a precipitation tank installed at an end of the multi-stage reactor system and precipitating magnesium hydroxide generated
from the calcium oxide and the seawater;

a seawater outflow unit installed at a top end of the precipitation tank and allowing the seawater remaining after reacting
with the calcium oxide to be discharged;

a gas inflow unit installed at a bottom end of the precipitation tank, supplying the precipitation tank with carbon dioxide
and air and allowing the carbon dioxide and magnesium hydroxide to react with each other to form bicarbonate ions; and

a concentrated seawater outflow unit installed in the precipitation tank and discharging concentrated seawater containing
the bicarbonate ions.

US Pat. No. 9,590,407

DEVICE FOR REMOVING ICE AND SNOW FROM POWER TRANSMISSION LINE

KOREA ELECTRIC POWER CORP...

1. A device for removing ice and snow from a power transmission line, comprising:
a support member installed on the power transmission line; and
a vibrator that is provided for the support member and applies vibrations to the power transmission line so as to remove the
ice and the snow attached to the power transmission line,

wherein:
the vibrator has a pair of vibrators that are symmetrically formed in a pair in a lengthwise direction of the power transmission
line on the basis of the center of the support member, and

a controller controls an amount of vibration of the vibrators according to attached circumstances of the ice and the snow
and controls the amount of vibration applied to the power transmission line,

wherein the support member includes:
a first support member covering one side of the power transmission line; and
a second support member that is disposed to face the first support member and covers the other, side of the power transmission
line,

wherein the vibrator includes:
a driver disposed at a lower portion of the second support member;
an installer installing the driver on the second support member; and
an eccentric part that is coupled to a shaft of the driver and is eccentrically rotated to generate the vibrations,
wherein the installer includes:
a fixing bracket provided on one side of the driver;
an installing bracket that is coupled to the fixing bracket and is installed at a lower side of the second support member;
and

fixing members that pass through the installing bracket and are coupled to the fixing bracket,
wherein the fixing bracket is provided with a first engagement part in a front surface thereof, and the installing bracket
is provided with a second engagement part in a rear surface thereof so as to be coupled to the first engagement part,

wherein the first engagement part has a shape of a circular protrusion protruding to the front surface of the fixing bracket
or a circular recess recessed in the front surface of the fixing bracket, and

wherein the fixing bracket is provided with a first anti-rotation part in a front surface thereof, the installing bracket
is provided with a second anti-rotation art in a rear surface thereof so as to be coupled to the first anti-rotation part,
and rotation between the first engagement part and the second engagement part is prevented by part and the second anti-rotation
part.

US Pat. No. 9,575,482

APPARATUS AND METHOD FOR ADJUSTING A VOLTAGE IN A POWER DISTRIBUTION SYSTEM

KOREA ELECTRIC POWER CORP...

1. A voltage control apparatus for controlling voltage through switching of a switch present on a path in a power distribution
system, the apparatus comprising:
a processor including:
a voltage optimization unit configured to determine switching-target switches from among switches present on the path, and
to calculate a voltage optimization value of the determined switching-target switches; and

a switch selection unit configured to select a switch corresponding to a location at which a voltage optimization value is
minimum while moving locations of the switching-target switches, and to control voltage of the selected switch through switching
of the selected switch,

wherein the voltage optimization unit comprises:
a voltage distribution value calculation unit configured to calculate a voltage distribution value of a transformer and a
voltage distribution value of a power distribution line corresponding to the switching-target switches;

a normalization unit configured to normalize the voltage distribution value of the transformer and the voltage distribution
value of the power distribution line; and

an optimization unit configured to calculate a voltage optimization value by applying target coefficients to each of the normalized
values.

US Pat. No. 9,871,377

DEVICE AND METHOD FOR COOPERATION CONTROL OF EMS AND DMS

KOREA ELECTRIC POWER CORP...

1. An apparatus for cooperative control of an Energy Management System (EMS) and a Distribution Management System (DMS), comprising:
an input device for receiving EMS information from an EMS and DMS information from a DMS; and
a controller for (i) calculating an Area Q Index (AQI) based on target system information and flow calculation data included
in the received EMS information,

(ii) determining whether to switch the DMS to reactive power cooperative control, based on the calculated AQI and a required
local reactive power reserve (Qreq) included in the received EMS information, and determining a suppliable reactive power
amount based on the required local reactive power reserve (Qreq) included in the EMS information and a suppliable reactive
power range included in the DMS information, and

(iii) transmitting a cooperative control mode switching control signal so that the DMS switches a mode thereof to a reactive
power cooperative control mode, and controlling the DMS so that reactive power corresponding to the determined suppliable
reactive power amount is supplied to an upper layer, if it is determined to switch the DMS to reactive power cooperative control,

wherein the controller is configured to further calculate the AQI based on simplifying a target local system to a single equivalent
bus bar based on the target system information included in the EMS information, connecting a virtual power generator to the
equivalent bus bar, and performing flow calculation in each case while changing output of reactive power within a preset range.

US Pat. No. 9,997,919

APPARATUS AND METHOD FOR OPERATING DISTRIBUTED GENERATOR IN CONNECTION WITH POWER SYSTEM

KOREA ELECTRIC POWER CORP...

1. An apparatus for operating a distributed generator in connection with a power system, comprising:an input unit which receives a parameter calculated using power system information and a voltage and a current at a point of common coupling with the distributed generator, with which the distributed generator is connected;
a calculation unit which calculates an operating power factor instruction value and an active output instruction value using the parameter and the voltage and current at the point of common coupling with the distributed generator input to the input unit;
a control communication unit which determines and transmits the operating power factor instruction value and the active output instruction value according to the voltage at the point of common coupling with the distributed generator input to the input unit and an admissible voltage upper limit at the point of common coupling with the distributed generator to the distributed generator,
wherein active power and reactive power are generated by the distributed generator according to the transmitted operating power factor instruction value and active output instruction value, and
the operating power factor instruction value is a ratio of the active output to a reactive output of the distributed generator, which divides a line impedance corresponding to a section from the point of common coupling with the distributed generator to the substation into a resistance component and a reactance component and allows a voltage rise portion caused by an active output and the resistance component to be identical to a voltage drop portion caused by the reactive output and the reactance component.

US Pat. No. 9,838,228

DEVICE FOR REMOVING PARTIAL DISCHARGE NOISE AND METHOD OF DIAGNOSING THE SAME

KOREA ELECTRIC POWER CORP...

1. A device for removing partial discharge noise, comprising:
a distributor configured to distribute a partial discharge signal detected through a partial discharge sensor into at least
two signals when partial discharge is generated in a power device;

a distributed signal processor configured to perform distributed signal processing on each of the partial discharge signals
distributed by the distributor at reaction rates different from each other; and

a differential signal processor configured to receive output signals obtained by performing distributed signal processing
at reaction rates different from each other from the distributed signal processor, and remove noise included in the partial
discharge signal based on a strength difference of the output signals.

US Pat. No. 9,647,440

COMPOSITE DIRECT CONNECTOR FOR HIGH VOLTAGE LINE

Korea Electric Power Corp...

1. A composite direct connector for a high voltage line, comprising:
a pair of terminal connecting rings electrically connected to each other;
a plurality of ground terminals disposed on each terminal connecting ring to connect neutral lines of a first side of the
high voltage line and neutral lines of a second side of the high voltage line to each other;

a shield line provided between the pair of terminal connecting rings to electrically connect the pair of terminal connecting
rings to each other,

wherein an outer side of the shield line is surrounded by a sheath, and an inner side of the shield line has a hollow portion
to accommodate main lines of the high voltage lines that are connected to each other; and

a connecting member connected to the shield line and coupled with a ground rod,
wherein the connecting member comprises:
a fastening body surrounding an outer circumference of the shield line;
a first coupling portion provided on a first side of the fastening body; and
a second coupling portion provided on a second side of the fastening body, and coupled with the first coupling portion to
secure the fastening body to the outer circumference of the shield line, the second coupling portion being spaced apart from
the first coupling portion to define a space to which the terminal of the ground rod is coupled.

US Pat. No. 9,797,954

SYSTEM AND METHOD FOR MANAGEMENT OF CIRCUIT BREAKER COUNTER

KOREA ELECTRIC POWER CORP...

1. A system for management of a circuit breaker counter, the system comprising:
a data processing unit receiving state change data and measurement data of at least one of a circuit breaker and a current
measuring unit and transferring an event on the basis of the state change data and measurement data; and

a counter managing unit counting a total operation, a load-breaking operation and a fault-breaking operation of the circuit
breaker based on the event and the measurement data, and outputting and storing respective count accumulation values.

US Pat. No. 10,095,195

DEVICE AND METHOD FOR SCHEDULING POWER STORAGE DEVICES

Korea Electric Power Corp...

1. An apparatus for scheduling energy storage systems (ESSs), comprising:an input unit configured to receive integrated schedule information, characteristic information and state information of the ESSs;
a scheduling unit configured to generate schedule information of the ESSs, including at least one of charging schedule information and discharging schedule information, based on the received integrated schedule information, characteristic information and state information, wherein the scheduling unit is configured to generate at least one of the charging schedule information and the discharging schedule information of the ESSs based on a difference between load prediction data and new regeneration energy generation prediction data; and
an output unit configured to output the generated schedule information to the ESSs, wherein the ESSs perform charging and discharging according to the schedule information obtained from the output unit, and wherein the scheduling unit calculates target scheduling regions based on the integrated schedule information, and calculates matrix schedule information by arranging the ESSs based on time intervals in the target scheduling regions.

US Pat. No. 9,885,744

SYSTEM AND METHOD FOR DETECTING AN ABNORMAL WAVEFORM IN A POWER DISTRIBUTION SYSTEM

KOREA ELECTRIC POWER CORP...

1. A system for detecting an abnormal power quality waveform in a distribution system, comprising:
a main server configured to, when a fault occurs in a distribution system, generate a waveform measurement signal;
a Front End Processor (FEP) configured to transmit the measurement signal generated by the main server to one or more Remote
Terminal Units (RTUs) installed in the fault section, receive abnormal waveforms or voltages and currents of the distribution
system from the one or more RTUs, and transmit the abnormal waveforms or the voltages and currents to the main server; and

a plurality of RTUs, each being configured to, when the waveform measurement signal is received from the FEP, measure a voltage
and a current of the distribution system, generate an abnormal waveform, convert the measured voltage and current or the generated
abnormal waveform into data of a protocol format set based on request data included in the waveform measurement signal, and
transmit resulting protocol format data,

wherein the main server receives, stores, and displays the abnormal waveforms or the voltages and currents of the distribution
system measured in the fault section of the distribution system,

wherein the abnormal waveforms or the voltages and currents are the sum of the measured voltage and current or the generated
abnormal waveform from each of the plurality of RTUs, and

wherein each of the RTUs comprises a processor, the processor including:
a measurement unit for, when the waveform measurement signal is received, measuring power qualities including harmonics, an
instantaneous voltage sag, an instantaneous voltage swell, and an instantaneous interruption of a fault waveform, a current
waveform, and a voltage waveform in the fault section of the distribution system, and generating an abnormal waveform;

a protocol setting unit for setting a data transfer protocol with the FEP based on capacity of request data included in the
waveform measurement signal; and

a measurement control unit for performing control such that the measured voltage and current waveform or the abnormal waveform
is transmitted to the FEP in conformity with the set data transfer protocol.

US Pat. No. 9,882,504

HVDC RECTIFIER PROTECTION USING ESTIMATED AND MEASURED POWER

Korea Electric Power Corp...

1. A high voltage direct current (HVDC) power increase controller comprising:
a command output unit outputting a current command value to a main controller according to a disturbance signal;
a voltage drop determiner receiving an alternating current (AC) voltage, and comparing a level of the AC voltage to a voltage
at a lowest level causing a rectification failure; and

a power tracking determiner receiving a direct current (DC) power, and comparing a level of the DC power to an estimated power
level corresponding to the current command value,

wherein the command output unit adjusts the current command value according to a comparison result of the voltage drop determiner
and power tracking determiner.

US Pat. No. 9,709,532

PIPELINE INSPECTION DEVICE AND PIPELINE INSPECTION SYSTEM

Korea Electric Power Corp...

1. A pipeline inspection device comprising:
a body part accommodating the pipeline;
a coupling part coupled to the body part to enclose the pipeline; and
a sensor part including a sensor on at least one of one side of the body part and one side of the coupling part to inspect
an internal state of the pipeline,

wherein the coupling part includes:
an opening-closing member which is partially opened to allow the pipeline to be inserted, and has a connector on one side
of the opening-closing member;

an extension member which is hinge-coupled to another side of the opening-closing member, and extends from the another side
of the opening-closing member to penetrate through the body part and allow the opening-closing member to move vertically;

a fixing member fastened to an end portion of the extension member to fix the extension member to the body part; and
an elastic body mounted on the extension member and arranged between the body part and the fixing member.

US Pat. No. 9,673,633

APPARATUS AND METHOD FOR MINIMIZING DISTRIBUTION LOSS IN CONSIDERATION OF SECTION LOAD CHARACTERISTICS OF DISTRIBUTION SYSTEM

Korea Electric Power Corp...

1. An apparatus for minimizing distribution loss, the apparatus reconfiguring a system configuration of a distribution system
while considering section load characteristics of different distribution systems, the apparatus comprising:
a calculation period selection unit configured to determine a loss calculation period for detecting a loss minimization time
point using the different distribution systems;

a total loss value calculation unit configured to calculate a total loss value by calculating loss values of the different
distribution systems set for respective time points of the loss calculation period; and

a loss minimization solution determination unit configured to select each of the different distribution systems once during
the loss calculation period, and to calculate a specific system configuration loss value of each of the distribution systems
while considering variations in section load of the selected distribution system,

wherein the loss minimization solution determination unit determines the loss minimization time point using the specific system
configuration loss values of the distribution systems and the total loss value, and

wherein the loss minimization solution determination unit selects a specific system configuration loss value that belongs
to the specific system configuration loss values and is closest to the total loss value of the distribution system, and determines
a time point, at which a distribution system corresponding to the closest specific s stem configuration loss value during
the loss calculation period has been set, to be the loss minimization time point.

US Pat. No. 10,138,615

BASE BODY OF ELECTRIC TRANSMISSION TOWER USING MICROPILE

KOREA ELECTRIC POWER CORP...

1. A base body of an electric transmission tower using a micropile, comprising:an anchor member coupled to a main pole member of the electric transmission tower;
a foundation member coupled to the anchor member and including a plurality of foundations; and
the micropile configured to fix the foundation member to a ground and compress the foundation member,
wherein the anchor member includes:
a plurality of anchor plates coupled to the foundation member and separated from each other, the plurality of anchor plates disposed inside the foundation member; and
an anchor pole configured to connect the plurality of anchor plates to each other and be attachably and detachably coupled to the main pole member,
wherein an upper end of the anchor pole passes through a base of the main pole member, the base disposed outside the foundation member and separated from the plurality of anchor plates, and
wherein at least one anchor plate of the plurality of anchor plates is disposed in a middle layer of the plurality of foundations.

US Pat. No. 10,020,437

SUPERCONDUCTIVE CURRENT LIMITING ELEMENT OF CURRENT LIMITER AND METHOD FOR MANUFACTURING SUPERCONDUCTIVE CURRENT LIMITING ELEMENT OF CURRENT LIMITER

Korea Electric Power Corp...

1. A superconducting current-limiting element for a current limiter, comprising:superconducting wires extending in a straight line and stacked in one or more layers;
connection blocks and insulation blocks respectively disposed at both ends of the superconducting wires between the stacked superconducting wires so that the connection blocks and the insulation blocks are alternately located in each of the layers; and
a terminal provided at each of an end of an uppermost superconducting wire and an end of a lowermost superconducting wire among the stacked superconducting wires,
wherein the superconducting wires are in a bar shape configured to include a substrate extending in a straight line on one surface thereof and a superconductor provided on another surface thereof.

US Pat. No. 10,106,979

SEISMIC REINFORCING DEVICE

KOREA ELECTRIC POWER CORP...

1. A seismic reinforcing device comprising:an upper support installed on an upper horizontal portion configured to connect columns;
lower supports installed on a lower horizontal portion, which is disposed under the upper horizontal portion and connects the columns, and disposed in a diagonal direction with respect to the upper support, disposed at a non-zero distance from each of the columns;
dampers coupled to the upper support and one of the lower supports and configured to absorb a shock; and
corrugated damper covers,
wherein each of the dampers includes:
a damper upper coupler coupled to the upper support;
a damper lower coupler coupled to one of the lower supports;
a damper hydraulic portion configured to connect the damper upper coupler and the damper lower coupler and having a length adjusted by hydraulic pressure; and
a damper elastic portion configured to elastically support the damper upper coupler and the damper lower coupler, and the damper elastic portion surrounds the damper hydraulic portion,
the damper elastic portion and the damper hydraulic portion are enclosed by and spaced-apart from one of the corrugated damper covers.

US Pat. No. 10,308,529

DESALINATION APPARATUS AND DESALINATION METHOD USING SAME

Korea Electric Power Corp...

1. A desalination apparatus comprising:a forward osmosis unit which comprises a draw solution part into which sea water flows and a raw water part into which raw water flows, with an osmosis membrane formed between the draw solution part and the raw water part to generate each of first treated water and first concentrated water;
an electrosorptive desalination unit connected to the draw solution part through a first inflow path and into which the first treated water of the draw solution part flows to generate second treated water; and
an electrodialysis unit connected to the raw water part through a second inflow path and into which the first concentrated water of the raw water part flows to generate third treated water.

US Pat. No. 10,291,023

INVERTER DEVICE FOR MICROGRID, AND METHOD FOR CONTROLLING SAME

KOREA ELECTRIC POWER CORP...

1. An inverter device for a microgrid, the inverter device comprising:a waveform detector detecting a voltage waveform and a current waveform applied to a load;
a controller determining whether a sine wave appears based on the detected voltage waveform and the detected current waveform and performing voltage control or low order harmonic compensation depending on a determination result; and
a switch generating a voltage waveform in a form of the sine wave by being turned on/off depending on a control signal received from the controller and supplying the generated voltage waveform in the form of the sine wave to the load,
wherein the controller comprises:
a load type determination controller determining that a type of the load is a fundamental wave when the sine wave appears in the detected voltage waveform and the detected current waveform, and determining that the type of the load is at least one of an unbalanced load or a non-linear load when the sine wave does not appear;
a proportional-resonant controller controlling a voltage through a proportional-resonant control on a stationary reference frame when the type of the load is determined to be the fundamental wave; and
a resonant controller compensating for a low order harmonic through a resonant control on the stationary reference frame when the type of the load is determined to be the unbalanced load and the non-linear load.

US Pat. No. 10,169,528

METHOD AND DEVICE FOR GENERATING ENGINEERING TOPOLOGY OF DIGITAL SUBSTATION

Korea Electric Power Corp...

1. A method of controlling and/or monitoring a digital substation, the method comprising:automatically generating a computer-readable engineering topology of a digital substation by:
generating, by a single-line diagram generation module, a single-line diagram of the digital substation based on input information regarding a plurality of substation component devices and connection relations therebetween;
converting, by a topology conversion module, the single-line diagram of the digital substation into an engineering topology conforming to international standards by use of conversion conditions stored in a topology component management module;
verifying, by a topology verification module, whether the engineering topology is suitable for the digital substation based on the international standards; and
generating, by an international standard file generation module, a computer-readable single-line diagram engineering file of the digital substation as a system specification description (SSS) by use of the verified engineering topology;
providing the computer-readable single-line diagram engineering file to a computerized supervisory control and data acquisition (SCADA) system; and
controlling, by the SCADA system, the digital substation,
wherein converting the single-line diagram into an engineering topology comprises establishing connection relations between connection nodes (CN) and terminals for individual objects included in the single-line diagram of the digital substation, and
verifying whether the engineering topology is suitable comprises determining whether an isolated object is present among objects contained in the single-line diagram of the digital substation based on a determination that an object is not linked with any other object.

US Pat. No. 10,200,409

APPARATUS AND METHOD FOR SECURITY POLICY MANAGEMENT

Korea Electric Power Corp...

1. An apparatus for security policy management, comprising a processor configured to:generate a rule set by converting predefined access policy security rules acquired from one or more systems into a document in a standard format;
extract a network topology from a network diagram concerning the one or more systems; and
generate a standard policy for plural systems by adding up unions of the generated rule set, each of the unions being applied to each of the plural systems, and the extracted network topology,
wherein the standard policy is represented as follows:

wherein Ri,j is a security rule one system, Ti the network topology, and Pi is the standard policy,
wherein when a new system (n+1) is added to the one system, the processor is further configured to perform a first consistency verification process which is represented as follows:

wherein Rn+1 is a security rule of the new system,
wherein, when the one system is changed to another system, the processor performs a second consistency verification process which is represented as follows:

wherein Rn? is a security rule of the changed system,
wherein the processor is further configured to determine whether the security rule of the new system or the security rule of the changed system is included as a part of the standard policy,
wherein the processor automatically collects security rules from the one or more systems and integrates the collected security rules in the standard format to accurately analyze conflicts between network access policies and errors in the network access policies, and
wherein the processor is further configured to generate the rule set by converting the acquired access policy security rules into an XML format by adding a verified standard policy file in a lowermost part of the acquired access policy security rules for each of one or more systems and to store the converted rules.

US Pat. No. 10,120,953

SYSTEM DATA COMPRESSION SYSTEM AND METHOD THEREOF

Korea Electric Power Corp...

1. A system data abbreviation system, comprising a system data abbreviation processor configured to:classify system data into classes of a database of an internal application program and mapping the classified system data;
search for data of the class to be abbreviated from the database of the application program; and
group the searched data of the class, set link relations between data that belongs to the group, set link relations between the group and the classes of the database of the application program, and abbreviate the data,
wherein the system data abbreviation processor further:
classifies the system data into the data classes of the application program database;
generates nodes based on the classes of the data; and
performs mapping that generates a link structure between the nodes and the data,
wherein the link structure is set as a link relation between a group having the data of an abbreviation class of the classes extracted according to a pre-defined condition and data of the application program database to eliminate unnecessary nodes, and
wherein the pre-defined condition is when lines of a node are three or more in number or a switch provided at the node is not a manual switch or a user-designed switch,
wherein the system data abbreviation processor checks whether lines have been connected to the node of the data in order to determine whether the corresponding data is a simple branch;
checks whether a switch provided at the node of the data is a manual switch or a user-designated switch; and
extracts the data of the corresponding class as an abbreviation class, when the connected lines of the node are three or more in number or the switch provided at the node of the data is not a manual switch or a user-designated switch the node,
wherein the data classes of the database of the application program are each classified as a branch or a switch.

US Pat. No. 10,393,788

APPARATUS AND METHOD FOR DIAGNOSING STATE OF POWER CABLE AND MEASURING REMAINING LIFE THEREOF USING VLF TD MEASUREMENT DATA

Korea Electric Power Corp...

1. An apparatus for diagnosing a state of a power cable and maintaining the power cable, the apparatus comprising:a Weibull modeling unit performing Weibull distribution modeling by accumulating VLF tan delta (TD) signal data measured for each of a plurality of voltage levels applied to a power cable;
a distance limiting unit comparing a Weibull distribution for accumulated VLF TD signal data with a preset Weibull distribution for the accumulated VLF TD signal data for each measurement distance to limit a measurement limit distance;
a data type classifying unit classifying the VLF TD signal data into a type on a basis of the limited measurement limit distance, the type comprising a trend and a pattern;
a quantity representing unit quantitatively representing the classified type;
a normalization unit representing, to dispersion distributions, the VLF TD signal data and VLF TD signal deviation (DTD), and the VLF TD signal data and a slope of deviation (SKIRT) derived from the quantity representing unit, and normalizing the dispersion distributions to derive normalization distributions;
a 3D constructing unit constructing a 3D matrix with the derived normalization distributions;
a risk level calculating unit calculating a risk level of the power cable as one of preset risk levels based on a distance measured in the 3D matrix; and
a life measuring unit determining a maintenance action for the power cable based on the calculated risk level, the maintenance action being one selected from a group consisting of replacement of the power cable, re-measurement of the VLF TD signal data, and setting a time for re-measurement of the VLF TD signal data.

US Pat. No. 10,325,062

METHOD AND DEVICE FOR GENERATING ENGINEERING TOPOLOGY OF DIGITAL SUBSTATION

KOREA ELECTRIC POWER CORP...

1. A method for automatically generating an engineering topology of a digital substation conforming to international standards by using existing single line diagrams of the digital substation, comprising steps of:generating, by at least one processor, a single line diagram of the digital substation based on input information regarding a plurality of substation component devices and connection relations therebetween;
converting, by the at least one processor, the single line diagram of the digital substation into an engineering topology conforming to international standards by use of pre-stored conversion conditions;
verifying, by the at least one processor, whether the engineering topology is suitable for the digital substation based on the international standards; and
generating, by the at least one processor, a single line diagram engineering file of the digital substation as a system specification description (SSS) by use of the verified engineering topology,
wherein the step of converting the single line diagram into an engineering topology comprises steps of:
establishing connection relations between connection nodes (CN) and terminals for objects included in the single line diagram of the digital substation; and
representing the connection relations on a drawing in the form of an engineering topology conforming to the international standards,
wherein the step of establishing connection relations between connection nodes (CN) and terminals comprises steps of:
(a) finding an object on the single line diagram in a preset order;
(b) selecting the found object and changing a search tag of the found object from “false” (unprocessed) to “true” (processed);
(c) retrieving a pre-stored number of terminals for the selected object;
(d) placing connection nodes between the objects of the single line diagram on the terminals of the selected object;
(e) examining search tags of all objects connected to the selected object, when an object connected to a terminal of the selected object is present;
(f) creating one connection node according to preset generation rules for connection nodes, and storing information regarding all the objects connected to the terminal of the selected object at the created connection node, when all the examined search tags are set to “false” (unprocessed);
(g) finding a connection node having information on the selected object among created connection nodes, and linking the found connection node to the terminal of the selected object, when a search tag set to “true” (processed) among all the examined search tags is present;
(h) repeating, for all remaining unprocessed terminals of the selected object, the steps (e) to (g); and
(i) repeating, for all remaining unprocessed objects, the steps (a) to (h).

US Pat. No. 10,164,443

METHOD OF CONTROLLING FREQUENCY OF POWER SYSTEM

KOREA ELECTRIC POWER CORP...

1. A method of controlling a frequency of a power system by which the frequency of the power system is regulated using high-speed charging and discharging characteristics of a plurality of energy storage systems (ESSs) and a battery state of charge (SOC), the method comprising:comparing, by a control unit, first time information (Before_Exit_time) and second time information (After_Exit_time) and performing an exit control mode when the first time information is equal to or less than the second time information;
determining, by the control unit, an output amount for each ESS for discharging batteries using a battery discharging amount determining function (Exit_control_output( ) function) when a first parameter value (D_time) preset in the exit control mode is a positive value greater than zero and the second time information (After_Exit_time) is equal to or less than a second parameter value (Clear_time); and
discharging, by the control unit, batteries until the frequency reaches a normal range when an allocated amount of output for each ESS is calculated.

US Pat. No. 10,464,046

FLUIDIZED BED WATER GAS SHIFT CATALYST

Korea Electric Power Corp...

1. A water gas shift reaction catalyst composition comprising:an active component including copper oxide (CuO) and cerium oxide (CeO2), and including at least one selected from the group consisting of cobalt oxide, nickel oxide, molybdenum oxide and barium titania;
at least one support selected from the group consisting of alumina having a specific surface area of 150 m2/g to 250 m2/g, and hydrotalcite comprising 30 parts by weight to 60 parts by weight of magnesium hydroxide;
at least one inorganic binder selected from the group consisting of bentonite, kaolin, an alumina sol, a silica sol, and boehmite; and
a stabilizer formed of hydrotalcite comprising 30 parts by weight to 60 parts by weight of magnesium hydroxide.

US Pat. No. 10,394,975

DEVICE AND METHOD FOR CALCULATING STABILITY AND PREDICTING ERROR OF POWER SYSTEM NETWORK

Korea Electric Power Corp...

1. A device for determining stability of a power system network and predicting an error thereof, the device comprising a processor configured to:receive standard object information from a power system network;
determine connection state stability Sstate representing when a network connection state is stable on the basis of the standard object information, wherein the standard object information comprises at least one of:
a number of times to retry to connect to the network ConnRtryCnt until a state is changed from a temporary error state to a permanent error state;
a number of times to retry to connect to the network ConnFailRtryCnt in the permanent error state;
a number of times to reject trying to connect to the network ConnRej;
a list of alternative paths to a main path NetAltPth;
states of the alternative paths to the main path AltPthSt; or
an available valid path availablePath;
determine connection time stability Stime representing when a network connection time is stably maintained on the basis of the standard object information, wherein the standard object information comprises at least one of:
an average connection time ConnAvTmms; or
a current-connection-state maintenance time ConnCurTmms after connection to the network;
determine final network connection stability using the network connection state stability Sstate and the connection time stability Stime,
wherein the device further comprises:
an error prediction information display device connected to the processor and displaying error prediction information determined using the determined standard object information, to notify an operator with a current state of the network, and
wherein the error prediction information comprises at least one of:
the final network connection stability;
the connection state stability Sstate;
the connection time stability Stime; or
network path information and values of states of the network.

US Pat. No. 10,396,559

APPARATUS FOR MANAGING VOLTAGE STABILITY OF ELECTRICAL POWER GRID AND METHOD THEREFOR

Korea Electric Power Corp...

1. An apparatus for managing voltage stability of an electrical power grid, the apparatus comprising:a fast response type voltage control circuit generating reactive power output ratio information by using voltage information received from a plurality of target buses;
a reactive power distribution circuit generating reactive power reference information based on the reactive power output ratio information, and generating end voltage adjustment information by using the reactive power reference information;
an end voltage adjustment circuit adjusting an end voltage by using the end voltage adjustment information;
a transient reduction control circuit generating an auxiliary signal when a frequency is changed, and providing the auxiliary signal to the reactive power distribution circuit; and
a voltage adjustment control circuit generating an additional auxiliary signal by measuring voltages of the target buses, and providing the additional auxiliary signal to the end voltage adjustment circuit,
wherein the fast response type voltage control circuit generates a proportional coefficient by calculating sensitivity between reactive power and the voltages of the target buses, generates an integral coefficient by using the proportional coefficient and an integral time, and generates a differential coefficient by using the integral coefficient and a differential time.

US Pat. No. 10,379,935

AGENT SYSTEM FOR INTELLIGENT SYSTEM MANAGEMENT BY DIGITAL SUBSTATION AND OPERATION METHOD THEREFOR

Korea Electric Power Corp...

1. An operating system-side agent device for sharing switch information, which is used in automatic recovery of a digital substation, between an operating system and an intelligent electronic device (IED) in the digital substation, the device comprising a processor and a non-transitory memory coupled to the processor and storing instructions executable by the processor, the processor configured to:request the switch information from an intelligent electronic device-side agent device mounted in the intelligent electronic device (IED); and
receive the switch information from the intelligent electronic device-side agent device, the switch information being collected by the intelligent electronic device-side agent device,
wherein the operating system-side agent device is provided as a module, and is mounted in the operating system,
wherein the switch information comprises a switch attribute of a switch, a question answer attribute used in request and response between the intelligent electronic device-side agent device and the operating system-side agent device, and an IEC 61850 standard based common data class (CDC) model attribute, and
where the switch attribute comprises at least one of a circuit breaker name, state information of the switch managed by the intelligent electronic device (IED), a control type for the switch operated by the intelligent electronic device (IED), control availability information of the switch, and interlock configuration information and interlock signal information that are used for controlling the switch.

US Pat. No. 10,180,997

APPARATUS FOR SIMULATING WIND POWER FARM

KOREA ELECTRIC POWER CORP...

1. An apparatus for simulating a wind power farm, comprising:a processor including:
a wind power generator simulator configured to act as a virtual wind power generator to dynamically generate an attribute value and provide the attribute value to a supervisory control and data acquisition (SCADA) system to be tested;
a wind power generator simulation platform configured to generate and manage a plurality of wind power generator simulators within one system, monitor hardware resources installed in the system, monitor operation states of the plurality of wind power generator simulators, and transmit a result of monitoring the operation states; and
a wind power farm controller configured to generate a wind power farm by grouping a plurality of wind power generator simulation platforms into a single cluster, and manage a simulation environment of the wind power farm,
the SCADA system controls a physical wind power turbine based on the simulation environment of the wind power farm,
wherein each of the wind power generator simulation platforms generates the plurality of wind power generator simulators using the wind power farm controller to provide the simulation environment of the wind power farm within a range of the hardware resources of each of the systems, and
wherein, when the wind power farm controller receives a request from a user to generate a new virtual wind power generator, the wind power farm controller controls the wind power generator simulation platform to generate a wind power generator simulator and to transmit in real time the attribute value, which is obtained by simulating a virtual wind power generator, as test data to the SCADA system to be tested, whereby a simulation environment of a large-scale wind power farm to verify the functionality and stability of the SCADA system is provided.

US Pat. No. 10,335,762

MID-TEMPERATURE RANGE DRY REGENERABLE SOLID CARBON DIOXIDE SORBENT, SLURRY COMPOSITION AND METHOD FOR MANUFACTURING THE SAME

KOREA ELECTRIC POWER CORP...

1. A mid-temperature range dry regenerable solid carbon dioxide (CO2) sorbent composition applicable for a fluidized bed sorption enhanced water gas shift (SEWGS) process, the mid-temperature range dry regenerable solid carbon dioxide (CO2) sorbent composition comprising:10 to 70 parts by weight of an active ingredient;
10 to 60 parts by weight of a support;
3 to 30 parts by weight of a reaction accelerator;
5 to 20 parts by weight of an inorganic binder; and
0.1 to 3 parts by weight of a viscosity modifier, based on the total weight of the mid-temperature range dry regenerable solid carbon dioxide (CO2) sorbent composition,
wherein the viscosity modifier is at least one selected from the group consisting of glucose and a melamine compound.
US Pat. No. 10,456,772

SOLID CARBON DIOXIDE ABSORBENT INCLUDING AMINE OR A COMPOUND THEREOF FOR USE IN THE CAPTURING PROCESS OF DRY CARBON DIOXIDE, AND METHOD FOR MANUFACTURING SAME

Korea Electric Power Corp...

1. A carbon dioxide absorbent manufactured by a method, the method comprising the steps of:(A) preparing a slurry composition including a carrier composition containing a support and an inorganic binder, and a solvent;
(B) preparing solid particles by spray drying the prepared slurry composition;
(C) manufacturing a carrier by dry calcining the solid particles at a temperature between about 350° C. and about 1,000° C. and under an atmosphere of one of air, nitrogen, helium, and a reducing gas, wherein the carrier has a specific surface area of between 50 m2/g and 500 m2/g; and
(D) receiving an amine compound into pores of the manufactured carrier.