Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Outage Rate Calculating Method of Energy Storage System for the Application on Power System Operation

전력계통 운영적용을 위한 전기저장장치 고장률 산정방안

  • Song, Seung-Heon (Smart Grid Research Center, Dept. of Electrical Engineering, Chonbuk National University) ;
  • Choi, Woo-Yeong (Smart Grid Research Center, Dept. of Electrical Engineering, Chonbuk National University) ;
  • Kook, Kyung-Soo (Smart Grid Research Center, Dept. of Electrical Engineering, Chonbuk National University)
  • Received : 2019.03.08
  • Accepted : 2019.03.26
  • Published : 2019.03.31
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Abstract

As the contribution of the Energy Storage System (ESS) on the power system operations has increased, it is required to secure the reliability on the capacity of ESS and this needs to consider the outage rate in calculating the available capacity of ESS. However, the existing method of calculating the outage rate does not consider the configuration of ESS and this does not accurately calculate the available capacity of ESS. For this, this paper analyzes the structural characteristics of ESS in Korean power system and proposes a method to calculate the outage rate of ESS. Through the study cases adopting the Korea Electric Power Corporation (KEPCO) ESS for providing the frequency response service, the effectiveness of the proposed method verified.

전기저장장치가 주파수조정예비력 자원으로써 전력계통 운영에 대한 기여도가 증가됨에 따라 전기저장장치 설비용량의 신뢰성 확보가 요구되고 있으며, 이를 위해서는 전기저장장치의 가용용량에 고장률을 고려할 필요가 있다. 그러나 기존의 전기저장장치 고장률 산정방안은 전기저장장치 설비의 구조적 특징을 정확히 고려하지 못해 전기저장장치의 가용용량을 정확히 반영하지 못하고 있다. 본 논문에서는 전기저장장치 설비의 특징을 분석하고 이를 반영한 전기저장장치의 고장률 산정방안을 제안하였고 사례연구를 통하여 제안된 방안의 유효성을 검토하였다.

Keywords

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Fig. 1. ESS for providing frequency regulation in Korean power system. 그림 1. 국내 주파수조정용 전기저장장치 현황

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Fig. 2. Configuration of FRC controller. 그림 2. 국내 FRC 제어기 구성도

Table 1. Data list for calculating outage rate of ESS. 표 1. 전기저장장치 고장률 산정을 위한 데이터 목록

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Table 2. Calculation result of outage rate with the existing method. 표 2. 기존 전기저장장치 고장률 산정방안 적용결과

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Table 3. Calculation result of outage rate with the proposed method. 표 3. 제안된 전기저장장치 고장률 산정방안 적용결과

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References

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  2. KEPCO, "KEPCO Major Business," http://home.kepco.co.kr/kepco/KE/I/htmlView/KEIBHP001.do?menuCd=FN0102030901
  3. MOTIE, The 8th Basic Plan for Long-term Electricity Supply and Demand, 2017.
  4. W. Y. Choi and K. S. Kook, "Impact Analysis of BESS for Providing Frequency Response in Korean Power System," 7th international conference on Advanced Power System Automation & Protection (APAP 2017), 2017.
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