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리튬이온배터리의 화재 감지, 방지 및 소화 방법에 관한 실증연구
임건표,김미성 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.6
최근 국내 에너지저장장치(ESS, Energy Storage System)에 사용되는 리튬이온 배터리에서 지속적인 화재가발생하고 있다. ESS 화재의 내외부적 원인은 매우 다양하여 근본적인 원인을 규명하고 제거하기가 어렵다. 전기 에너지를 저장하고 있는 배터리의 화재는 배터리 내부의 에너지가 열폭주 상태가 되어 화재로 이어지기 시작하면 에너지가완전히 소진될 때까지 꺼지기 어렵다. 배터리의 상태는 전기, 온도 등의 변화를 감지하여 동작하는데 DNV-GL, NFPA 등의 연구에서는 전기, 온도 변화가 화재 직전까지 이를 방지할 만큼 큰 변화를 보이지 않았다. 따라서 본 연구에서는배터리에서 발생하는 감지 요소를 조기에 감지하여 열폭주와 화재로 이어지기 전에 측정할 수 있으며, 전기 및 온도외에도 추가적인 요소를 이용하여 화재를 예방할 수 있음을 실증을 통해 검증하였다.
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.
석탄화력발전소 보일러 연료제어 알고리즘과 분산제어시스템의 개발
임건표(Gun-Pyo Lim),이흥호(Heung-Ho Lee) 대한전기학회 2013 전기학회논문지 P Vol.62 No.1
This paper is written for the development and application of boiler fuel control algorithm and distributed control system of coal-fired power plant by the steps of design, coding, simulation test, site installation and site commissioning test. Fuel control algorithm has the upper algorithm and it is boiler master control algorithm that controls the fuel, feed water, air by generation output demand. Generation output demand by power load influences fuel control. Because fuel can not be supplied fast to the furnace of boiler, fuel control algorithm was designed adequately to control the steam temperature and to prevent the explosion of boiler. This control algorithms were coded to the control programs of distributed control systems which were developed domestically for the first time. Simulator for coal-fired power plant was used in the test step. After all of distributed control systems were connected to the simulator, the tests of the actual power plant were performed successfully. The reliability was obtained enough to be installed at the actual power plant and all of distributed control systems had been installed at power plant and all signals were connected mutually. Tests for reliability and safety of plant operation were completed successfully and power plant is being operated commercially. It is expected that the project result will contribute to the safe operation of domestic new and retrofit power plants, the self-reliance of coal-fired power plant control technique and overseas business for power plant.
500㎿급 석탄화력발전소 보일러 급수펌프 유량 제어기 개발
임건표(Geon-Pyo Lim),최인규(In-Kyu Choi),박두용(Doo-Yong Park),정태원(Tae-Won Jeong),김건중(Gun-Jung Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.9
The boiler feed-water pump controllers which can be applied to 500MW class coal fired power plants was developed. The validity of the developed controllers was shown via the applied test result in a power plant. It is expected that the developed controllers are used to retrofit the existing controllers that have surpassed their expected service life and have limited spare parts, and contributes to the stable operation of plants. Based on the collected data and analysis, new control schemes were developed and implemented during the overhaul period in the new control systems. During normal operation, feed water could be supplied to the boiler with the capability of the 1600t/h flow without any problems in automatic mode of controllers. In this study, the feed-water pump controllers were developed successfully. In addition, it is expected that the developed controllers can make the plant operation more stable and can be applied to a lot of power plants.
임건표(Gun-Pyo Lim),최인규(In-Kyu Choi),박두용(Doo-Yong Park),김건중(Gun-Jung Kim) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Generator Droop(Speed Regulation) is very important for the stable operation of power system and the profit increase by the auxiliary service like frequency control. After reviewing the control logic and parameters, we conducted the load following characteristic test and adjusted the speed regulation and parameters. Speed regulation has been improved close to the base value. All of power plants including the pumped storage power plants need to adjust the speed regulation during the overhaul period.
임건표(Gun-Pyo Lim),박두용(Doo-Yong Park),김종안(Jong-Ahn Kim),이흥호(Heung-Ho Lee) 대한전기학회 2012 전기학회논문지 Vol.61 No.3
Almost domestic power plants are being operated by foreign distributed control system. Many korean power plants are being operated over their lifetime so they need to be retrofitted. So we are developing the distributed control system to solve this problem by our own technique. The simulator was already made to verify the reliability of the algorithms. The unit loop function tests of all algorithms were finished in the actual distributed control system for installation of power plant and their results were satisfactory. The unit loop function tests are for each unit equipment algorithm. So the total operation tests will be made with all algorithms together in the actual distributed control system to be applied to power plant. When the verification through all tests is finished, algorithms with hardware will be scheduled to be installed and operated in the actual power plant. This research result will contribute to the safe operation of the deteriorated power plant and korean electric power supply as well as domestic technical progress. This entire processes and results for the development are written for the example of boiler feedwater master algorithm out of all algorithms in this paper.
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.