COORDINATED DESIGN OF ROBUST PSS AND SVC DAMPING CONTROLLER IN A MULTIMACHINE POWER SYSTEM

摘要

This paper proposes a coordinated design of robust PSS and SVC damping controller (DC) in a multimachine power system. The proposed design method arranges designed controllers and a multimachine power system as a decentralized controller and a multi-input multi-output (MIMO) system, respectively. Practically, suitable parameters of co ordinate controllers are difficult to find. To overcome this problem, a tabu search (TS) is employed to search for the optimal parameters in order to improve the robustness of power system. In particular, the robust stability index is concerned to acquire the better stability margin and, simultaneously, the robust performance is guaranteed. The performance of designed controllers under different operating conditions and disturbances is examined in a case of three-area five-machine power system. Consequently, nonlinear simulation results are carried out to show the effectiveness of the designed controllers.