Research on Grid Power Quality Control Strategy Based on Energy Storage Capacity

In order to improve the ability of energy storage to participate in power quality control of power grid and prolong the life of energy storage system, this paper proposes an energy storage capacity. Quality governance strategy. Firstly, the structure of power conversion system (PCS) is introduced, and the reference current generation method is given. Then, according to the current capacity of the energy storage system, the compensation control method is selected, and the proportional vector proportional product is proposed for the insufficient energy storage capacity. Proportional Vector Proportional Integral (PVPI) PCS frequency division control strategy, using PVPI control has frequency selection characteristics, According to the residual capacity of energy storage, the power quality problems such as harmonic, reactive power and three-phase imbalance of power grid are selectively controlled. Finally, build a distributed energy storage device The experimental results show that the proposed energy storage converter control strategy is effective when the energy storage capacity is insufficient. Improve grid power quality.