Measurement-based voltage stability monitoring for load areas

Kai Sun; Fengkai Hu    University of Tennessee, Knoxville, TN, United States


This article introduces a measurement-based voltage stability monitoring method for a load area fed by N tie lines. Compared to a traditional Thevenin equivalent (TE)-based method, the new method adopts an N + 1 buses equivalent system so as to model and monitor individual tie lines. For each tie line, the method solves the power transfer limit against voltage instability analytically as a function of all parameters of that equivalent, which are identified online from real-time synchronized measurements on boundary buses of the load area. Thus, this new method can directly calculate the real-time ...

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