A free-weighting matrix approach to wide-area coordinated control among multiple FACTS devices

With the wide application of flexible AC transmission system (FACTS) in power system, one of the major directions of FACTS development is the research of multi-FACTS coordinated control (MFCC) based on wide-area measurement system (WAMS). Since time-delay is unavoidable in WAMS, this study concentrates on the anti-delay coordinated control algorithm based on free-weighting matrix approach which utilizes the output feedback signals from WAMS. By taking time delay into consideration, the proposed algorithm ensures the minimum ratio of time-delay system, and the optimal gain of MFCC can be obtained through the quantum evolutionary algorithm. The validity and applicability of the proposed coordinated control algorithm is demonstrated in a four-machine, two-area system.