- Volume 64 Issue 12
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Seamless Transfer Method of BESS Connected by Engine Generator
엔진발전기와 연계된 BESS의 무순단 모드 전환 기법
- Shin, Eun-Suk (Dept. of Electrical Engineering, Myongji University) ;
- Kim, Hyun-Jun (Dept. of Electrical Engineering, Myongji University) ;
- Kim, Kyo-Min (Dept. of Electrical Engineering, Myongji University) ;
- Yu, Seung-Yeong (Dept. of Electrical Engineering, Myongji University) ;
- Han, Byung-Moon (Dept. of Electrical Engineering, Myongji University)
- Received : 2015.08.03
- Accepted : 2015.11.23
- Published : 2015.12.01
In remote islands PV (Photo Voltaic) panel with BESS (Battery Energy Storage System) supplies electric power to the customers in parallel operation with EG (Engine Generator) to save fuel consumption and to mitigate environmental load. BESS operates in voltage control mode when it supplies power to the load alone, while it operates in current control mode when it supplies power to the load in parallel with EG. This paper proposes a smooth mode change scheme from current control to voltage control of BESS by adding proper initial value to the integral part of voltage control, and a smooth mode change scheme from voltage control to current control by tracking the EG output voltage to the BESS output voltage using PLL (Phase-Locked Loop). The feasibility of proposed schemes was verified through computer simulations with PSCAD/EMTDC, and the feasibility of actual hardware system was verified by experiments with scaled prototype. It was confirmed that the proposed schemes offer a seamless operation in the stand-alone power system in remote islands.
Supported by : 한국에너지기술평가원(KETEP)
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