KEPCO Journal on Electric Power and Energy

  • 제6권2호
  • /
  • Pages.119-122
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  • 2020
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  • 2465-8111(pISSN)
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  • 2466-0124(eISSN)
한국전력공사 (Korea Electric Power Corporation)
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지/단락실증시험에서 MW급 계통연계형 ESS 절연/보호시스템 성능 분석에 관한 연구

Analysis on Insulation and Protection Characteristics of Grid Connected ESS in Ground/Short-Circuit Fault

  • Kim, Jin-Tae (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Seung-Yong (Department of Electrical Engineering, Seoul National University) ;
  • Park, Sang-Jin (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Cha, Han-Ju (Department of Electrical Engineering, ChungNam National University) ;
  • Kim, Soo-Yeol (KEPCO Research Institute, Korea Electric Power Corporation)
  • 투고 : 2020.02.24
  • 심사 : 2020.04.07
  • 발행 : 2020.06.30
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초록

With recent ESS (Energy Storage System) fire accident, the fault protection performance is becoming more important. However, there has never been any experiments with the protection performance on the faults in the ESS system level. In this study, the effect of AC ground fault and IGBT (Insulated Gate Bipolar mode Transistor) short-circuit failure on MW class ESS was performed experimentally for the first time in the world. First of all, the effect of the AC single line ground fault on battery was analyzed. Moreover, the transient voltage was investigated as a function of the battery capacity and the power level. Finally, the breaking capability and insulation performance of ESS were examined under PCS short-circuit fault condition. Through the tests, it was found that ESS protection system safely blocked the faulty current regardless of the faults, whereas the electronic parts such as IGBT and MC (Magnetic Contactor) were broken by the fault current. Also, the electrical breakdown in ESS resulted from the transient voltage during the protection process.

키워드

참고문헌

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