A Study on the Optimal Operation According to Appropriate PCS and Battery Capacity Estimation of PV-BESS System

PV-BESS 시스템의 적정 PCS, 배터리용량 산정에 따른 최적 운영에 관한 연구

  • Choi, Yun Suk (Korea Electric Power Research Institute) ;
  • Na, Seung You (Dept. of Electronics and Computer Engineering, Chonnam National University)
  • Received : 2018.07.11
  • Accepted : 2018.08.21
  • Published : 2018.09.01


In December 2017, the government announced plans to increase the current proportion of renewable energy from 7% to 20% by 2030 through a plan called the Renewable Energy 3020 Implementation Plan. Therefore, the demand for installation of photovoltaic(PV), wind turbine(WT) and battery energy storage system(BESS) is expected to increase. In particular, the system combined with energy storage system(ESS) is expected to take up a large portion since PV and WT can receive high renewable energy certificates(REC) weights when combined with ESS. In this study, we calculate the optimal capacity of the power conditioning system(PCS) and the BESS by comparing the economical efficiency and maximize the efficiency of the PV-BESS system in which the PV and the BESS are connected. By analyzing the system marginal price(SMP) and REC, it maximize profits through application of REC weight 5.0 and optimal charge-discharge scheduling according to the SMP changes.


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