Verification Test of Short Term Power Fluctuation Compensation in Microgrid by Use of Air-Conditioning System for Commercial Building

Abstract

In this paper, the use of heat pump air-conditioning system (HPACS) for power fluctuation compensation is focused. Verification experiments have been carried out using a model microgrid system with gas engine, battery energy storage system (BESS), HPACS, photovoltaic cells, and loads. The BESS's necessary energy capacity for power fluctuation compensation and the microgrid system's ability to suppress power fluctuation is analysed by use of experimental results. It is clarified from the analysis that control of HPACS is effective for reduction of BESS's necessary energy capacity without deterioration of microgrid's ability to suppress power fluctuation. Furthermore, the temperature of the rooms that use the HPACS is calculated by a room temperature calculation model. The results show that the temperature fluctuation caused by control of HPACS is negligible small.