Study The Active Reactive Power Compensation

The reactive power compensation is an important engineering in the power system. The active reactive power compensator designed in this text takes the instantaneous reactive power theory of three-phase as foundation, and is formed by the reactive current testing circuit, current tracking control circuit and the main circuit, and among them the current tracking control circuit is formed by instruction current arithmetic circuit, current polarity checkout circuit and current tracking control logic circuit three parts in the circuit form. Among them, the action of the reactive current testing circuit is testing the reactive current component in the compensated object current. The action of current tracking control circuit is:1)the instantaneous reactive current yield the instruction current of the compensating current according to the reactive current testing circuit got, 2) according to the interrelationship of the instruction current and the real compensating current, yields PWM's control signal controlling each units of main circuit ducting, the result of controlling pledges the compensation current following the tracks of his instruction current's change. The simulation object list indicates that the active reactive power compensation can carry on the compensation of reactive power very well.