Design of ±10 kvar STATCOM based on IGBT

STATCOM(Static Synchronous Compensator) is the best selection for reactive power compensation in power system up to now. The design scheme of a IGBT(Insulated -Gate Bipolar Transistor)-based ±10 kvar STATCOM is introduced. Its main circuit,structure,power,protection and startup manner are discussed. Its controller and pulse generator are implemented with a multi-CPU system composed of two DSPs and an FPGA(Field Programmable Gate Array). The physical experimental results verify its satisfying performance with distortion ratio of voltage or current no more than 5 %,response time no more than 40 ms and conversion efficiency being 94.92 %.