Power swing reduction in synchronous generators via SVC designed with sliding mode control

Abstract

Swing equations of individual synchronous generators in multi-machine systems have strong power-swing nonlinearities. In this paper and for the first time, we introduce sliding mode control (SMC) laws to deal with power swing reduction problem in individual generators directly without linearizing their swing equations. The suggested control laws are implemented by static VAR compensators (or simply, the so-called SVC) attached to the output terminal of a generator. To improve steady-state and/or transient performances in power generation and operation of generators, we further consider adjusting the coefficients of switching function and the control gains. Numeric stimulation clearly shows that the suggested sliding mode control stabilization works well.