Static var generator, and control method and control module of static var generator

The invention provides a static var generator, a static var generator control method and a static var generator control module, and relates to the technical field of power electronics. The static var generator comprises a direct current bus, a control module, an energy storage module, a power module, a power supply module and a voltage sampling preprocessing module, the preset AC power supply is connected with the DC bus through the power module. The energy storage module is connected with the DC bus and the control module. The power supply module is connected with the direct-current bus and the control module; the control module is connected with the voltage sampling preprocessing module, and the voltage sampling preprocessing module is also connected with a preset AC power supply. The energy storage module is arranged in the static var generator, the energy storage module is connected with the direct current bus and the control module, when the voltage of the alternating current provided by the preset alter