Patents Assigned to Korea Electric Power Corporation
  • Publication number: 20200185920
    Abstract: The present invention relates to an ESS control device based on transient stability state and a method thereof, the an ESS control device based on transient stability state according to an embodiment of the present invention including an input unit receiving phase angle information from a power system; a calculation unit calculating a change rate in the phase angle of the power system using the phase angle information; a determination unit determining the transient stability state of the power system by comparing the change rate of the phase angle with a predetermined threshold; and a control unit performing control so that an energy storage system (ESS) installed in a power generation stage is switched to a charging mode according to the determination result.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 11, 2020
    Applicant: Korea Electric Power Corporation
    Inventors: Tae-Ok KIM, Jong-An KIM, Gu-Han KIM, Chong-Ho RHIM, Yong-Gu HA
  • Publication number: 20200179879
    Abstract: A carbon dioxide (CO2) separation membrane module performance evaluation system and device may include a simulated gas supply line configured to simulate a gas composition of boiler exhaust gas and supply the gas to a module unit part; the module unit part including a CO2 separation membrane module and configured to cause the gas to permeate through the CO2 separation membrane module and separately discharge permeated gas, to a permeation line, and separately discharge passed gas to a passage line; a discharge line configured to combine the gases and discharge the combined gas to the outside of the system; an analyzer part configured to collect each of the gas, analyze components thereof, and evaluate performance of the module; a refiner part to remove pollutants; a measurer part to measure a flow rate, a temperature, and a pressure; and a controller part to determine a state of the overall system.
    Type: Application
    Filed: January 5, 2018
    Publication date: June 11, 2020
    Applicant: KOREA ELECTRIC POWER CORPORATION
    Inventors: Jung Bin LEE, Joong Won LEE, Kyung Min KIM, Jun Han KIM, Yong Seok EOM, Ky Yeong SHIN, Gwan Shig KIM
  • Publication number: 20200181931
    Abstract: A damper for reinforcing earthquake resistance according to the present invention includes a first supporting part mounted in a building structure, a second supporting part mounted on a support structure movably disposed to be separated from the building structure, and disposed to face the first supporting part, and a damper part connecting the first supporting part with the second supporting part and absorbing energy generated by an earthquake.
    Type: Application
    Filed: August 22, 2018
    Publication date: June 11, 2020
    Applicant: KOREA ELECTRIC POWER CORPORATION
    Inventors: Kyung Jin LEE, Sang Hoon OH, Kwang Yong CHOI, Kyung Won HAHM
  • Patent number: 10675606
    Abstract: Provided are a composition and a manufacturing method of a solid CO2 sorbent having excellent physical properties and chemical reaction characteristics, particularly having an excellent mid-temperature range activity for a fluidized bed process, for use in collecting a CO2 source (pre-combustion or pre-utilization) in syngas application fields such as integrated coal gasification combined cycle (IGCC) power systems, synthetic natural gas (SNG) and synthetic liquid fuel (CTL).
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: June 9, 2020
    Assignees: KOREA ELECTRIC POWER CORPORATION, KOREA WESTERN POWER CO., LTD.
    Inventors: Joong Beom Lee, Dong Hyeok Choi, Tae Hyoung Eom, Jeom In Baek, Seong JeGarl
  • Patent number: 10641662
    Abstract: The present invention relates to a method for estimating a geothermal gradient and an apparatus for estimating a geothermal gradient, and provides a method for estimating a geothermal gradient, the method comprising the steps of: calculating, at each of a plurality of points, a seismic wave crustal attenuation characteristic parameter of a seismic wave measured on the basis of the measured seismic wave information, with respect to the plurality of points; deriving an artificial neural network relational formula on the basis of the seismic wave crustal attenuation characteristic parameter; and calculating a geothermal gradient of an area of interest excluding the plurality of points on the basis of the artificial neural network relational formula, such that the geothermal gradient is estimated at a low cost by using a highly reliable method.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: May 5, 2020
    Assignee: Korea Electric Power Corporation
    Inventors: Kwan Hee Yun, Jung Tak Shim, Eun Ju Jung
  • Patent number: 10622811
    Abstract: Disclosed in a stand-alone micro-grid autonomous control system including: at least one battery system directly changing a reference frequency thereof according to a charge amount, and providing power having the changed reference frequency; at least one power generator measuring the reference frequency from the power provided form the at least one battery system, and starting generating power or stopping generating power based on the measured reference frequency; and at least one load measuring the reference frequency from the power provided from the battery system, and performing a synchronization operation or a synchronization releasing operation based on the measured reference frequency.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: April 14, 2020
    Assignee: Korea Electric Power Corporation
    Inventors: Won-Wook Jung, Cheol-Min Chu, Jung-Sung Park, Sang-Yun Yun, Seong-Chul Kwon, Jeong-Hun Kim
  • Patent number: 10615711
    Abstract: The present invention relates to an apparatus for controlling an output voltage for a single-type converter and a method therefor, the apparatus including: a power input/output unit connected in parallel to both poles of the single-type converter, respectively, thereby receiving and outputting output voltages, respectively; an output voltage and current measurement unit measuring output currents and the output voltages output from the power input/output unit; a controller performing a current limit control for a protection coordination for a first pole and performing a voltage control for a second pole following a checking of a state of the first pole of the both poles of the single-type converter using the measured output currents; a switching unit being switched according to a control performed on the both poles; and a power transfer unit transferring the output voltages of the single-type converter according to switching of the switching unit.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: April 7, 2020
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Jin-Tae Cho, Ju-Yong Kim, Jae-Han Kim, Young-Pyo Cho
  • Patent number: 10498142
    Abstract: A device for extinction angle control of a high voltage direct current (HVDC) system, includes: a converter reactive power calculator calculating a reactive power variation amount of a converter included in the HVDC system, depending on firing angle control of the converter; an alternating current (AC) system short circuit level calculator calculating a short circuit level of an AC system by applying the reactive power variation amount to a short circuit level formula of the AC system connected to the HVDC system; an extinction angle variation value calculator calculating an extinction angle variation value of the converter, corresponding to the short circuit level; and an extinction angle controller controlling an extinction angle of the converter, depending on an extinction angle control value reflecting the extinction angle variation value.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: December 3, 2019
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Seong-Doo Lee, Soon-Ho Choi, Chur-Hee Lee
  • Patent number: 10464046
    Abstract: The present invention relates to an aqueous gas-converting catalyst composition comprising: an active component; a support; an inorganic binder; at least one accelerator selected from the group consisting of cobalt oxide, molybdenum oxide, nickel oxide, calcium oxide, barium oxide, strontium oxide, magnesium oxide, zirconium oxide, manganese oxide and barium titania; and at least one stabilizer selected from the group consisting of magnesium oxide, zirconium oxide, stabilized zirconia, and hydrotalcite. The catalyst according to the present invention can effectively capture and separate carbon dioxide due to the excellent physical properties thereof such as packing density and abrasion resistance, and high CO conversion. Also, according to the present invention, mass production is facilitated by applying a spraying technique, and overall costs are lowered because of high yield.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: November 5, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Joong Beom Lee, Chong Kul Ryu, Tae Hyoung Eom, Dong Hyeok Choi, Jeom In Baek, Seong Jeagarl, Seok Ran Yang
  • Patent number: 10456772
    Abstract: The present invention relates to a method for manufacturing a carbon dioxide absorbent and to the absorbent manufactured by the method. The method comprises: (A) a step of preparing a slurry composition including a carrier composition containing a support, an inorganic binder, and a solvent; (B) a step of preparing solid particles by spray drying the thus-prepared slurry composition; (C) a step of manufacturing a carrier by dry calcining the thus-prepared solid particles; and (D) a step of receiving an amine compound into the pores of the thus-manufactured carrier. According to the absorbent of the present invention, an absorbing reaction and a regenerating reaction at a low temperature range (less than or equal to 100° C. may be conducted, and therefore, the cost for capturing CO2 in a dry capturing process may be expected to decrease.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: October 29, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Tae Hyoung Eom, Joong Beom Lee, Chong Kul Ryu, Kyeong Sook Kim
  • Patent number: 10396559
    Abstract: The present invention relates to an apparatus for managing voltage stability of an electrical power grid and a method therefor.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: August 27, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Jeong-Hoon Shin, Su-Chul Nam, Ji-Young Song, Seung-Mook Baek
  • Patent number: 10393788
    Abstract: An apparatus and method for diagnosing the state of a power cable and measuring the remaining life thereof using VLF TD measurement data, and for determining a replacement time of a power cable using a 3D matrix exhibiting reproducibility of diagnosis of the state of the power cable. The apparatus and method for diagnosing the state of a power cable and measuring the remaining life thereof according to the present invention includes a Weibull modeling unit, a distance limiting unit, a data type classifying unit, a quantity representing unit, a normalization unit, a 3D constructing unit, a risk level calculating unit, and a remaining life measuring unit.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: August 27, 2019
    Assignees: Korea Electric Power Corporation, Mokpo National Maritime University Industry-Academic Cooperation Foundation
    Inventors: Sung-Min Kim, Dongsub Kim, Si Sik Jeon, Byung-Suk Kim, Jangsub Im
  • Patent number: 10394975
    Abstract: The present invention relates to a device and a method for calculating stability and predicting an error of a power system network, the device comprising: a standard object information reception unit for receiving standard object information provided by a power system network; a connection state stability calculation unit for calculating connection state stability (Sstate) using the standard object information; a connection time stability calculation unit for calculating connection time stability (Stime) using the standard object information; a network connection stability calculation unit for calculating a final network connection stability using the network connection state stability (Sstate) and the connection time stability (Stime); and an error prediction information display unit for displaying error prediction information including at least one of network path information, a network state value, the final network connection stability, the connection state stability (Sstate), and the connection time stab
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: August 27, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Chung Hyo Kim, Yong Hun Lim, Seong Ho Ju, Kyung Seok Jeon, Jong Kwan Kim, Chang Hwan Sung
  • Patent number: 10379935
    Abstract: The present invention relates to to an IEC 61850 information-based agent system for intelligent system management by a digital substation and an operation method therefor. To this end, 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 including: a request unit requesting the switch information from an intelligent electronic device-side agent device mounted in the intelligent electronic device (IED); and a communication unit receiving 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.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: August 13, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Nam-Ho Lee, Byung-Tae Jang, Yong-Ho An, Jeong-Yeol Han, You-Jin Lee, Jong-Kee Choi, Seok-Kon Kim
  • Patent number: 10359301
    Abstract: The present invention relates to a signal processing device for monitoring states of wind-power turbine blades and a method thereof, the signal processing device comprising: an optical fiber sensor unit for sensing moment of rotation of three blades so as to output the moment of rotation as blade signals; a signal transformation unit for converting three blade signals into two fore-ape signals; a rotation information input unit for sensing rotation information of the blades; a rotation speed estimation unit for estimating a rotation speed of the blades on the basis of the rotation information; a state determination unit which removes rotation components from the fore-ape signals and determines whether an operation of a blade is abnormal; and an output unit for outputting the determination result.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 23, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Jae Kyung Lee, Joon Young Park, Jun Shin Lee, Byung Mok Park, Keum Seok Kang, Moo Sung Ryu, Ji Young Kim, Seok Tae Kim, Dae Soo Lee
  • Patent number: 10356113
    Abstract: Disclosed herein are an apparatus and method for detecting abnormal behavior in a main device and a terminal device, included in a control network, using a whitelist. The apparatus for detecting abnormal behavior includes an information collection unit for collecting system information about the main device and system information about the terminal device and a detection unit for detecting abnormal behavior in the main device and the terminal device by comparing a whitelist with system information that includes the system information about the main device and the system information about the terminal device, wherein the whitelist includes a process whitelist, a file whitelist, and a network whitelist.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: July 16, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Yong-Hun Lim, Seong-Ho Ju, Chung-Hyo Kim, Yoo-Jin Kwon
  • Patent number: 10353365
    Abstract: Provided are an electric power facilities identification number management apparatus and method for generating and managing standard identification numbers for respective electric power facilities by connecting the standard identification numbers with existing identification numbers that are differently set for each operating system. The apparatus generates a standard identification number for an electric power facility associated with an operating system when an existing identification number of the electric power facility is a non-standard identification number, generates a control command for collection of the standard identification number generated and collects the standard identification number generated on the basis of the control command generated, verifies the collected standard identification number.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 16, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Jin-Ho Shin, Young-Jun Kim, Seung-Hwan Choi
  • Publication number: 20190213694
    Abstract: A method of supporting collection of demand resources among electricity consumers in a micro grid may include: selecting a number of demand resource participating customers that are greater than or equal to a predetermined number of households and verifying electricity consumption types for the selected participating customers; calculating electricity consumption patterns and electricity consumption fluctuation rates for the customers who have passed the electricity consumption type verification; assessing potential reduction amounts for the customers who have passed the fluctuation rate calculation; checking whether the number of participating customers is greater than or equal to the predetermined number of households according to demand resource registration criteria and the sum of potential reduction amounts of participating customers satisfies a requirement for a demand reduction amount; and calculating a customer baseline load that maximizes a reduction amount of a customer using customer baseline load
    Type: Application
    Filed: December 1, 2016
    Publication date: July 11, 2019
    Applicant: KOREA ELECTRIC POWER CORPORATION
    Inventors: Jung Il LEE, Hee Jeong PARK, Young Bae PARK, Jun-Sung KIM
  • Patent number: D857927
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: August 27, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Won-Kyo Lee, Cheol-Hee Yun
  • Patent number: D859129
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: September 10, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Sang-Man Park, Woon-Yong Choi, Kyu Young Lee, Min-Ha Lee