MODELING OF SVC FOR STABILITY EVALUATION USING STRUCTURE PRESERVING ENERGY FUNCTION

In this paper the static var compensator (SVC) has been accurately inc orporated into the structure preserving energy function (SPEF) with a detailed generator model including flux decay and transient saliency, automatic voltage regulator (AVR) and damper winding. The SVC can be m odelled for transient stability studies using the steady-state control characteristic and is treated as a voltage-dependent reactive power l oad. This simplifies simulation and results in the derivation of an ex act path-independent energy function to account for the effect of the SVC inclusive of its limits. Application of this SPEF to transient sta bility evaluation is illustrated with a numerical example including th e critical case of a three-phase fault with line outage.