Research on Energy Storage of Grid-Forming Voltage Comprehensive Management Based on Orderly Charging and Discharging Strategy

The distribution network in rural areas is weak, there are few reactive power compensation devices, the power supply radius is long, and the problem of low voltage is very prominent, which seriously affects the normal living standards of users at the end of the line. Compared with the traditional line transformation and reactive equipment compensation scheme, the grid-based comprehensive voltage management scheme based on distributed energy storage has the advantages of low cost, fast response speed and continuous compensation, but there are potential risks of overcharge and over-discharge of energy storage batteries during system operation. Therefore, this paper proposes a low-voltage collaborative governance strategy based on the orderly charging and discharging of distributed energy storage, which can effectively improve the terminal voltage of the line by flexibly adjusting the battery charging and discharging power and the line power compensation form, and can avoid the PCS disconnection caused by the overload of the energy storage battery during operation. Numerical calculations and simulation results verify the correctness and effectiveness of the proposed strategy, which is an innovative reliability emergency guarantee scheme for terminal voltage control in the rural areas.