Analysis of VSC based Facts Stabilizers in Damping Power System Oscillations

W. Du, Z. Chen, and H.F. Wang (PRC, UK)

Keywords

Power system oscillations, FACTS stabilizer, equalarea criterion

Abstract

The Voltage Source Converter (VSC) based FACTS (Flexible AC Transmission Systems) devices, such as STATCOM (Static Synchronous Compensator), SSSC (Series Static Synchronous Compensator) and UPFC (Unified Power Flow Controller), can be equipped with a supplementary damping function to improve power system oscillation stability. In this paper, general principle of this type of VSC based FACTS stabilizers in damping power system oscillations is investigated with analytical conclusions drawn. The analysis of damping effectiveness is carried out based on the well-know equal area criterion with useful analytical conclusions obtained. Demonstration of simulation results in an example power system is given in the paper. Extension to the case of multi-machine power systems is presented.

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