Abstract
A digital computer method used to evaluate the performance of a static shunt compensator as a device for controlling dynamic overvoltages caused by load rejection is presented. A typical system of a generating station connected to a load centre through an EHV transmission line with a static compensator at the load end is considered, and the envelopes of dynamic overvoltages following load rejection are evaluated. Detailed mathematical models incorporating the dynamics of a synchronous machine, transmission network and static shunt compensator are employed in the analysis. The static shunt compensator is shown to be an effective tool for controlling dynamic overvoltages. The application of this analysis for choosing an economic voltage rating of the surge arrestor is highlighted.
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