Energy storage demand of distribution network with photovoltaic based on voltage quality

Photovoltaic generation access to distribution network will cause voltage disturbance even beyond limits because of its variability and intermittency. Energy storage can effectively suppress the influence of PV on voltage and improve voltage quality. Voltage quality, the intuitive and practical indicator, is proposed in this paper to analyze the energy storage demand of distribution network with photovoltaic at the situation of different PV generation capacity, different partial load location and different gird parameters. Also, the result of voltage regulation is given after put into energy storage. Modeling and simulation shows that the energy storage demand is greater when photovoltaic with a larger capacity, partial load is closer to PV access point, or the node of PV access is farther away from balance node. Furthermore, the specific energy storage capacity and deploying recommendations are given according to using Matlab/Simulink to calculate.