[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Research on Energy Storage Optimization Control Strategy of Renewable Energy Microgrid System

摘要： Aiming at the operation control strategy of photovoltaic energy storage microgrid system. According to the “self-generated self-use, excess electricity sent to grid” mode, this paper proposes an economic optimization operation control strategy that can considering the cost of energy storage system in real time. The simulation verification the strategy can be used. The energy storage system has two working modes, a grid- connected mode and an independent mode. A seamless energy storage converter mode switching control technique is proposed, and the experimental results are given to verify the correctness of the theory. In response to the time-of-use price, the self-adjusting control strategy can achieve better economic operation benefits. The historical data of a practical project case in a characteristic town in Qinghai was used to simulate the whole year operational status of the strategy. The results show that the proposed strategy can greatly improve the life of energy storage system. And strategy can make the photovoltaic energy storage microgrid system achieve better operating income.