Bidirectional PWM chopper-type dynamic reactive power compensator

The utility model provides a bidirectional PWM chopper-type dynamic reactive power compensator, which is a piece of equipment belonging to the field of the electric energy quality control technology for an electric power system. By dynamically adjusting the duty ratio of a power switch in a bidirectional PWM chopper capacitor, the bidirectional PWM chopper-type dynamic reactive power compensator achieves the functions of adjusting the capacitive reactive power, smoothing a chopper voltage, filtering harmonic waves, isolating a high voltage, etc. The bidirectional PWM chopper-type dynamic reactive power compensator is characterized in that the bidirectional PWM chopper capacitor is connected to a three-phase four-wire electric network via an isolating transformer. The utility model has the beneficial effects that the bidirectional PWM chopper-type dynamic reactive power compensator eliminates the need of a follow-current power switch, a filter and a transformer which isolates the power switch from a fixed comp