재생에너지 수용률 확보 조건에서 연 단위의 BESS 경제적 운영전략

Abstract

The increase in Renewable Energy causes a problem of stability of the power system due to its intermittent characteristics. Renewable Energy depends on natural conditions such as wind speed and solar irradiation, which has characteristics of uncertainty and variability. An ESS(Energy Storage System) is being used as one of the flexible resources to cope with these variables. This paper proposed the economical BESS(Battery Energy Storage System) operation strategy under the precondition of accommodating Renewable Energy maximally, considering both BESS and Renewable Energy. The BESS operation strategy was established from the viewpoint of maximizing efficiency of BESS in consideration of battery degradation conditions and initial SoC(State Of Charge). The operation strategy establishment procedure was conducted in the order of analyzing the actual power demand data, grouping the load characteristics, calculating amount of the Renewable Energy, and deriving BESS charge/discharge scheduling. After removing outliers from the resulting values derived through a series of processes, we finally propose a continuous and consistent annual operation strategy for BESS.