Performance analysis of SSSC based on three-level multi-bridge PWM inverter

Abstract This paper describes a static synchronous series compensator (SSSC) based on three-level multi-bridge pulse width modulation inverter. The dynamic characteristic of proposed SSSC was analyzed by simulation with EMTP and experiment with a scaled hardware model, assuming that the SSSC is inserted in the transmission line of one-machine-infinite-bus power system. The proposed SSSC can be directly inserted in the transmission line without coupling transformers, and has flexibility in expanding the operation voltage to increase the number of bridges in series connection.