A Novel Method of Analysing the Damping Function of VSC based Facts Control - Multi-Machine Power Systems

W. Du, H.F. Wang, and R. Dunn (UK)


Power system oscillations, FACTS, equal-area criterion


The Voltage Source Converter (VSC) based FACTS (Flexible AC Transmission Systems) devices are such as STATCOM (Static Synchronous Compensator), SSSC (Series Static Synchronous Compensator) and UPFC (Unified Power Flow Controller). In [1], a novel method of analysing the damping function of this type of VSC based FACTS control is proposed. The method is developed on the basis of the well-know equal-area criterion and small-signal analysis. In this paper, extension of the method to the application in multi machine power systems is presented. It is concluded by theoretical analysis in the paper that there is little impact of STATCOM voltage control on the damping of power system oscillations. The conclusion is confirmed by simulation results.

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