Transient stability and voltage regulation enhancement via coordinated control of generator excitation and SVC

Abstract

This paper focuses on designing the coordinated control of Static Var Compensator (SVC) and generator excitation to achieve both the transient stability and voltage regulation enhancement of power systems. With the help of feedback linearization technique and robust control theory, the nonlinearity of power system, the variation in the system structure, the parameter uncertainties of the plant and the interconnections between generator and SVC are taken into consideration. The resulting controller is capable of stabilizing the overall system and achieving simultaneous transient stability and voltage regulation enhancement under diverse operating conditions. Only local measurements are required. The performance of the controller is evaluated through numeric simulation. Simulation results show that both transient stability and voltage quality can be improved effectively regardless of the system operating points and fault locations. © 2004 Elsevier Ltd. All rights reserved.