Grid Integration and Demand Response Management of Geothermal Power Plant with Hybrid Energy Storage System in Indonesia

Geothermal power plant (GPP) is one of clean energy sources, with large potential in Indonesia. The GPPs can supply power to the grid with the load demand changing simultaneously. The energy saving is required when the GPPs are operated under or over the ratings. In this paper, a study on the implementation of Hybrid Energy Storage System in Three-phase AC system (ACHESS) with adaptive PQ controller is proposed to support the operation of the GPPs. The GPP is connected through the ACHESS to the large transmission system. The ACHESS can work in charging mode when the load demand is decreased, or in discharging mode when the load demand is increases. The GPP is maintained to generate constant power as the ACHESS can absorb excess power or supply addition demand. The PQ controller is applied to control the difference of power between generation and load demand. The proposed system is developed in MATLAB/SIMULINK and is validated using real load demand data, recorded in Java-Bali, Indonesia.