Static synchronous compensator is an advanced power electronic device that combines supercapacitor energy storage technology with static synchronous compensator functions. It is mainly used for dynamic reactive power compensation and voltage stability in power systems. Its core is to synchronously connect the high-efficiency charge and discharge characteristics of supercapacitors on the DC side with the AC grid through a converter, realizing fast and precise regulation of grid reactive power. As an energy storage unit, the supercapacitor can instantly absorb or release energy with its high power density and millisecond-level response speed, effectively suppressing voltage fluctuations and improving power quality, especially excelling in scenarios such as wind power/photovoltaic grid connection fluctuations, sudden load changes, or fault transients. Compared with traditional compensators or battery energy storage systems, this device has advantages such as faster response, longer cycle life, and environmental friendliness without pollution. It is one of the key devices supporting the stable operation of smart grids.

