Magnetically controlled reactor system rapidly responding through longitudinal yoke coils and working method

The invention discloses a magnetically controlled reactor system rapidly responding through longitudinal yoke coils and a working method. The magnetically controlled reactor system includes a rapid degaussing coil wound on a longitudinal yoke of the magnetically controlled reactor and a rapid excitation coil wound on the longitudinal yoke of the magnetically controlled reactor, the rapid degaussing coil and the rapid excitation coil are the same as a main coil in winding direction, and the system also includes a rapid degaussing circuit, a rapid excitation circuit, a transformer and a rapid excitation controller. The magnetically controlled reactor system has the beneficial effects that through the abovementioned technology, the problems that a magnetically controlled reactor is relatively slow in response speed and cannot rapidly provide enough reactive energy when a low voltage fault occurs in a power grid can be effectively solved, response time of the magnetically controlled reactor during low voltage rid