Voltage regulator can be widely used in industrial and mining enterprises, oil fields, railroads, construction sites, schools, hospitals, post and telecommunications, hotels, scientific research and other departments of electronic computers, precision machine tools, computed tomography photography (CT), precision instruments, test devices, elevator lighting, imported equipment and production lines, etc., need to power supply a stable voltage. Also adapted to the power supply voltage is too low or too high, the fluctuation amplitude of the end of the low-voltage distribution network users and load changes in the power equipment, especially for all the power grid waveform requirements of high voltage stabilization of power places. High-power compensated power regulator can be connected to thermal, hydraulic, small generators.