Dynamic reactive power compensation device, which is also known as static synchronous compensator, static var generator. Due to its switching device IGBT, so the effect of dynamic compensation is early synchronous condenser, capacitor and reactive power compensation device can not match, with its low harmonic, high efficiency, fast dynamic response, become important equipment in the modern flexible AC transmission system of non reactive power compensation device. The device is mainly used for power compensation in frequent fluctuations without power and inhibit the grid flicker and harmonics, improve the power factor of the power grid, improving efficiency and quality of power supply in distribution network, and reduce network losses and to prolong the service life of the transmission line.
At present a variety of non reactive and harmonic compensation device, method for harmonics suppression and reactive power compensation are mainly two categories: a class is loaded assume that the harmonic reactive power compensation device; another kind is to power electronics equipment transformation, make it in the realization of its function and does not generate harmonic nor consume reactive power, or according to the need of the power factor correction.