Research on Grid-forming BESS in Improving Voltage Stability of Terminal Grid

In order to meet the demand for load growth in remote areas, it is necessary to tap the potential for improving the power supply capacity of the system from multiple perspectives such as power grid planning and power source constructions. However, traditional schemes such as strengthening grid construction have problems such as difficult land acquisition for transmission corridors and long implementation period. Therefore, it is urgent to find solutions with fast construction speed and good improvement effect. The grid-forming BESS has the support capacity similar to conventional synchronous generators, which can effectively improve the short-circuit capacity and power receiving capacity of the system. Firstly, the basic principle of grid-forming BESS was studied, and the difference between grid-forming BESS and grid-following BESS was compared, and the simulation model of grid-forming BESS was established. On this basis, the mechanism of improving system voltage stability was studied. Based on the application scenario of a regional power grid, the application effect of grid-forming BESS to improve the static stability limit and transient voltage stability level was studied. The analysis results show that the grid-forming BESS can effectively solve the problem of power receiving capacity gap of the receiving end system.