Design of Power System Stabilizer based on Sliding Mode Control Theory for Multi- Machine Power System

Abstract

This paper presents a new method for designing of power system stabilizer (PSS) based on sliding mode control (SMC) technique. The control objective is to enhance stability and improve the dynamic response of the multi-machine power system. The mathematical model of the synchronous generator is first transformed into a form that facilitates the design of nonlinear control schemes. Then, a sliding mode controller is proposed. In order to test effectiveness of the proposed scheme, simulation will be carried out to analyze the small signal stability characteristics of the system about the steady state operating condition following the change in the parameters of the system and to the disturbances. For comparison, simulation of a conventional control PSS (lead-lag compensation type) will be carried out. The main approach is to focus on the control performance which later is proven to have the degree of shorter reaching time and lower spike.

Keywords

• Power system stabilizer (PSS)
• multi-machine power system
• sliding mode control