This paper presents a description of modeling and application studies related to a modern static VAr system (SVS) installation in a utility grid. The SVS incorporates a fully integrated static VAr compensator (SVC) and coordinated, automatically switched capacitor banks using a sophisticated control system. The capacitor banks are switched by individual circuit breakers. Descriptions are provided for the SVC control strategy and various levels of modeling details for the application and design studies performed for this device. The stability model described in the paper expands on a previously published work to incorporate the slow susceptance regulator, coordinated/automatic capacitor switching, as well as pertinent protection functions. New insight is presented on the effect of SVC controls on the torsional damping of nearby generators and how such interaction can be easily avoided through proper voltage regulator tuning.
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Pourbeik et al. (2005) studied this question.
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