ROBUST CONTROL DESIGN OF PSS IN WIDE AREA POWER SYSTEM CONSIDERING INFORMATION RELIABILITY

In recent years, electric power system becomes larger and more complex due to the enlargement of power flow in wide area, the deregulation of electric utilities and the full-scale entry of Power Product Companies. Under the background both inter-area and local oscillations are significant. In order to cope with these problems, the advancement of the PSS(Power Stabilizing System) are expected. In this paper, we propose the control system on basis of the robust control theory, which can improve stability of power system in wide area. The proposed control system is based on the “hierarchical power and information network”; that is, the feedback control system is hierarchically constructed by using information of wide area system in correspondence with the level of reliability. In particular, we identify the dynamic impedance model of large power system by measuring voltage and current at the interconnection node. Copyright (c) 2006 IFAC.