Nonlinear control of SSSC for power system stability enhancement

This paper presents a novel nonlinear adaptive control scheme of static synchronous series compensator (SSSC) to enhance the transient stability and damping for multi-machine power system. The SSSC device is treated as a first order voltage resource and the multi-machine system is simplified into a two-machine model. Based on the exact feedback linearization theory and adaptive control law, the nonlinear adaptive controller of SSSC is derived. Unknown system parameters are considered for improving robustness. The simulation results validate the efficacy of the proposed controller.