Voltage regulator can be widely used in: industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, posts and telecommunications, hotels, scientific research and other departments of the electronic computer, precision machine tools, computed tomography (CT), precision instruments, test equipment, elevator lighting, imported equipment and production lines and other need power stable voltage places. It is also suitable for users at the end of the low-voltage distribution network where the power supply voltage is too low or too high, the fluctuation range is large, and the electrical equipment with large load changes. It is especially suitable for all the places where the power grid waveform is high and the voltage is regulated. High power compensation type electric voltage regulator can be connected with fire, hydraulic, small generator.