This paper first addresses the power system stability issue involving the regular generator-angle transient stability and load-driven voltage instability. Transient stabilization of simplified power systems equipped with the flexible ac transmission system (FACTS) device, the thyristor-controlled series capacitor (TCSC), is studied with consideration of unknown loads. With some off-line time-optimal trajectories computed based on the switching-times-variation method (STVM), some techniques are developed to synthesize robust near-time-optimal neural controllers. The theoretical support for these techniques is presented. The simulations illustrate the performance of the synthesized neural controllers. Furthermore, the results developed can be readily generalized to more general nonlinear systems.
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