Circuit design and mathematical model of STATCOM based on current source inverter

This paper introduces basic principle of a new type STATCOM which is used for fast flexible electric power system reactive power compensation. Being different from VSI(voltage source inverter),the principle of CSI(current source inverter) is used in the proposed STATCOM. This paper describes main circuit design and control strategy and establishes CSI STATCOM mathematical model which could depict the circuit principle properly. (4 pages)