The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Estimation of Optimal ESS Capacity Considering REC Weighting Scheme

REC 가중치를 고려한 최적 ESS 용량 산정에 관한 연구

  • Lee, Sungwoo (Dept. of Electrical and Computer Engineering, Pusan National University) ;
  • Kim, Hyoungtae (Dept. of Electrical and Computer Engineering, Pusan National University) ;
  • Shin, Hansol (Dept. of Electrical and Computer Engineering, Pusan National University) ;
  • Kim, Tae Hyun (Dept. of Electrical and Computer Engineering, Pusan National University) ;
  • Kim, Wook (Dept. of Electrical and Computer Engineering, Pusan National University)
  • Received : 2018.04.02
  • Accepted : 2018.07.17
  • Published : 2018.08.01
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Abstract

As the generation of renewable energy increases rapidly, the stability of the grid due to its intermittency becomes a problem. The most appropriate way to solve this problem is to combine and operate the renewable generators with the ESS(Energy Storage System). However, since the revenues of operating the ESS are less than the investment cost, many countries are implementing various incentive policies for encouraging investment of the ESS. In this paper we estimated optimal capacity of the ESS to maximize profits of renewable energy generation businesses under the incentive policy of Korea and analyzed the impact of the incentive policy on the future electric power system of Jeju island. The simulation results show that the incentive policy has significantly improved the profitability of the renewable energy businesses generation business. But the volatility of the net demand has increased as the energy stored in the ESS is discharged intensively at the time of the incentive application.

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