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Korea Photovoltaic Society (한국태양광발전학회)
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Profitability Analysis of ESS with PV Generation

PV연계형 ESS의 설치 규모에 따른 수익영향

  • Kim, Chang Soo (Power Grid Division, Korea Electrotechnology Research Institute) ;
  • Choi, Sang Bong (Power Grid Division, Korea Electrotechnology Research Institute)
  • 김창수 (전력망연구본부, 한국전기연구원) ;
  • 최상봉 (전력망연구본부, 한국전기연구원)
  • Received : 2020.09.07
  • Accepted : 2020.09.15
  • Published : 2020.09.30
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Abstract

The investment in solar and wind generation is rapidly increasing with government's renewable expansion policy and Renewable Portfolio Standard (RPS). Since the large penetration of solar and wind generation increases the variability and uncertainty of supply and demand balance in power system, the government is pursuing the policy of supplying energy storage system (ESS) linked to renewable energy. ESS contributes to the ease of transmission and distribution grid by shifting PV generation from daytime to evening hours. Recently, the declining market price of REC as ESS incentive, policies to cut down incentives and limited ESS storage due to fire events lead to the aggravation of long-term profitability, thus working as a barrier of ESS spreading. In this study, the factors affecting the profit of ESS are analyzed and brief indicators are derived. Based on the indicators, the profit changes are analyzed considering the variation of REC market price and REC incentive weights. Based on the profit change with respect to the increase of ESS capacity, economical ESS installation capacity is suggested.

Keywords

References

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