Abstract
When the photovoltaic microgrid energy storage system is optimized, it is affected by the capacity optimization algorithm, resulting in low tie line utilization in practical application. The multi-objective capacity optimal allocation of photovoltaic microgrid energy storage system based on time-sharing energy complementarity is proposed. According to the structure of photovoltaic microgrid energy storage system, its working principle is analyzed to provide theoretical support for capacity optimization. The multi-objective capacity optimization model is constructed from the three objectives of reducing life cycle cost, restraining renewable energy power fluctuation and maximizing tie line utilization. Based on the time-sharing energy complementary technology, an optimization algorithm with complementary characteristics is designed. Through the multi-objective solution, the best scheme to obtain the multi-objective capacity optimal configuration is obtained. The experimental results show that after the multi-objective capacity optimization configuration is completed, the tie line utilization of the energy storage system is increased by 21%, which greatly improves the working level of the photovoltaic microgrid.
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