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주파수조정용 에너지저장장치 시운전 자동화 시스템의 개발과 실증
임건표(Geon-Pyo Lim),최요한(Yo-Han Choi),이승민(Seung-Min Lee),박찬욱(Chan-Wook Park) 대한전기학회 2017 전기학회논문지 P Vol.66 No.3
System to automate the trial-run of energy storage system for frequency regulation was developed and demonstrated. Basic strategy was developed on the basis of trial-run procedure and verified in the computer simulation tool. The algorithm was developed and coded for 4MW trial-run automation system. 4MW trial-run automation system was connected to 4MW energy storage system for frequency regulation in Jocheon substation of Jeju city and demonstrated. 24MW trial-run automation system was developed on the basis of 4MW trial-run automation system and verified by operation system for 24MW energy storage system for frequency regulation. The operation system has own simulation model of energy storage system and power system. The verification was performed to improve the system in the view of user. 24MW trial-run automation system was demonstrated in 32MW Ul-san and 36MW Non-gong energy storage system. All tests of trial-run was done by manual and first they ware taken 1 week with no trial-run automation system. The manual trial-run tests were taken by maximum three times. Trial-run test by trial-run automation system was taken 2 days. The system helps reduce the trial-run test period and improve the accuracy of tests.
주파수조정용 에너지저장장치 운전제어 기술의 개발과 계통연계 자동제어 운전
임건표(Geon-Pyo Lim),최요한(Yo-Han Choi),임지훈(Ji-Hoon Im) 대한전기학회 2016 전기학회논문지 P Vol.65 No.4
Grid-connected, large-capacity energy storage systems (ESS) can be used for peak load supply, frequency regulation, and renewable energy output smoothing. In order to confirm the capability of battery ESS to provide such services, 4MW/ 8MWh battery ESS demonstration facility was built in the Jocheon substation on Jeju Island. The frequency regulation technology developed for the Jocheon demonstration facility then became the basis for the 28MW and 24MW frequency regulation ESS facilities installed in 2014 at the Seo-Anseong and Shin-Yongin substations, respectively. The operation control systems at these two facilities were continuously improved, and their successful commercialization led to the construction of additional ESS facilities all over Korea in 2015. In seven (7) locations nationwide (e.g., Shin-Gimje and Shin-Gyeryeong), a total of 184 MW of ESS had been commercialized in 2016. The trial run for the new ESS facilities had been completed between April and May in 2016. In this paper, results of the trial run from each of the ESS facilities are presented. The results obtained from the Seo-Anseong and Shin-Yongin substations during a transient event by a nuclear power plant trip are also presented in this paper. The results show that the frequency regulation battery ESS facilities were able to quickly respond to the transient event and trial run of ESS is necessary before it is commercialized.
주파수조정용 배터리 에너지저장장치 운전방법의 개발과 적용
임건표(Geon-Pyo Lim),박두용(Doo-Yong Park) 대한전기학회 2015 전기학회논문지 P Vol.64 No.2
Current research and development efforts and other projects for energy storage systems (ESS) have recently been gaining attention. This is due to the many applications where ESS, particularly batteries, can be used. Among these are peak shaving, frequency regulation, and stabilization of renewable energy output. KEPCO has completed the construction and demonstration of a 4-MW battery energy storage system (BESS) located in Jeju City to verify its practicability in the power grid. KEPCO Research Institute has also been developing technology for the commercialization of BESS, and has been conducting a trial run of a 52-MW ESS (28MW + 24MW of Seo-Anseong and Shin-Yongin substations) constructed in 2014 for frequency regulation. This paper discusses the development of operation methods, as well as an operation user interface, for the safe operation and monitoring of BESS used for frequency regulation in a power system. Included are operation and simulation methods for various normal and transient frequency situations that can be experienced by a power system. Also discussed are the results obtained after applying these methods to the 4-MW BESS and the 52-MW ESS, both used for frequency regulation. The technology in this paper will be applied to 500MW ESS for frequency regulation of KEPCO by 2017. It is expected that this technology helps a safe and reliable operation and control of ESS for frequency regulation through its continuous upgrade.
임건표(Geon-Pyo Lim),이흥호(Heung-Ho Lee) 대한전기학회 2011 전기학회논문지 Vol.60 No.10
The control logic of steam temperature was redesigned, tested and applied to the power plant after its steam temperature equipments had been revised. This power plant use the ancillary gas gotten in the process of making iron in the steel mill. The boiler of power plant has the superheater and reheater to make the superheated steam. The superheater and reheater have the spray valve to control their temperature. The reheater has the gas bypass damper additionally in this plant. The control logics were redesigned in cascade forms and the initial parameters of control logics were calculated from the several step tests. The final parameters could be obtained through the several repeated tests and the feedforward functions were added by temperature deviation and air flow. The power plant is being commercially-operated normally by improved control logics and It is expected that this improved controls help the efficiency improvement and safe operation of plant.
대형석탄화력발전소 보일러 급수펌프 유량제어밸브 프로그램 개발
임건표(Geon-Pyo Lim),최인규(In-Kyu Choi),정태원(Tae-Won Jeong),김건중(Kun-Jung Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
국내에 설치된 500㎿급 대형석탄화력발전소 22기 급수펌프 유량제어밸브 제어기는 아날로그 제어 시스템으로 노후화로 인해 고장확률이 증가하고 있다. 따라서, 안정운전을 위해 신규설비로 대체할 수 있는 제어기 프로그램을 개발하였다. 현장 여건에 맞는 제어 프로그램을 신규로 개발하고, 기존 제어시스템의 문제점을 보완하였다. 이후 시험을 통해, 개발한 프로그램의 신뢰성과 건전성을 확인하였다. 이번 연구결과를 계기로 사용수명을 초과하여 운영 중인 제어기를 대체할 수 있게 되었으며, 석탄화력발전소의 안정적인 설비운영에 일조를 하게 되었다.
모델 기반의 화력발전소 발전기 출력 제어 프로그램 개발
임건표(Geon-Pyo Lim),김문수(Mun-Soo Kim),최인규(In-Kyu Choi),박두용(Doo-Yong Park),김호열(Ho-Yol Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
The goal of this paper is to develope the control program based on model which can be applied to 1000㎿ class coal fired thermal power plant. 1000㎿ class power plant has the higher efficiency and lower cost because the steam conditions of the ultra super-critical process are higher than them of the previous power plants in temperature and pressure. The program includes the state variable controls which have the desired characteristics for the higher temperature and pressure. The program had been developed successfully using advanced process control. The simulation results using the new control program showed the better performance and safer control than them of the previous control program and we could verify the application possibility of the new program for the actual power plant through the load test, comparison, analysis and tuning.