Transient stability prediction and control in real-time by QUEP

A method for the real-time analysis and control of power system transient stability has been developed incorporating detailed machine models. The method uses a quasi-unstable equilibrium point (QUEP) energy function approach to evaluate the stability margin of a power system. The mode of disturbance that best predicts stability is determined very rapidly by a novel generating-unit-clustering procedure. Transient stability sensitivity coefficients are calculated for use in a constrained economic dispatch algorithm. Corrective action constraints are developed as simple limits on the sums of generator outputs. A theorem stating the necessary and sufficient conditions for the existence of a power-system energy function is presented