Static synchronous compensator using thyristor PWM current source inverter

This paper describes a static synchronous compensator using thyristor PWM c urrent source inverter, The proposed system consists of a 3-phase thyristor bridge with commutation circuit, a de reactor, and ac filter capacitors. T he 3-phase thyristor bridge operates as a current- source PWM inverter with assistance of commutation circuit. The system operation was verified in de tail through computer simulations with EMTP, and experiments with a scaled hardware model. The proposed system has two advantages of low switching las s and easy expansion of operation voltage through series connection of thyr istors.