POWER SYSTEMS WIDE-AREA DAMPING CONTROL BASED ON ONLINE SYSTEM IDENTIFICATION
Xiao Jinyu, Xie Xiaorong, Hu Zhixiang, Han Yingduo (Tsinghua University, Beijing 100084, China)
A new wide-area damping control (WADC) scheme based on wide-area measurements and online system identification is proposed. The identification method applied to single-input-multi-output system is presented. By using an improved Prony algorithm, it can obtain the reduced-order state equation model of the concerned system from the output responses. Parameters of the WADC are designed with linear quadratic (LQ) method in the identified model. The communication delay is then considered in the resulted close-loop control system, and the local maximum guarded-delay is derived by solving a linear matrix inequality (LMI). Finally, MATLAB simulation validates the accuracy of the system identification method and simulation results with a 36-node power system demonstrate the effectiveness of the proposed wide-area damping control scheme.