Development of a New Intelligent Compound Switch in Reactive Power Compensation

Aiming at the disadvantages in the application of reactive power compensation device with electromagnetic or power electronic switches for pulling in or out the capacitor, a new intelligent compound switch is developed which is based on single-chip computer AT89C52 and applied in var compensation for low voltage capacitor. compared with contactor and TSC, This compound switch has major advantages of smaller surge current in thyristor switching on or off and no loss respectively when contactor turning on.