The study on real-time transient stability emergency control in power system

In this paper, a real-time transient stability emergency control scheme is presented which is based on the wide area measurement (WAM) and high-speed communication technology. When a fault happens, the phasor measurement units (PMUs) acquire the information of the generators during and post-fault, and sent to the local area stability control center. Based on the EEAC, the paper proposes the emergency EEAC that is used to predict, analyze and estimate the degree of stability. The control action is a closed-loop rolling process that is enlightened from the general predictive control (GPC) theory, This scheme is applicable to any complex fault scenarios and any detail element models of the power system. The simulation showed that it could restrain the unmatching for some unpredicted serious contingency in the present emergency control and avoid a chain of events leading to large-scale power outage.