Harmonic analysis of static var compensator operating under distorted voltages

Abstract

The static var compensators (SVC) are still in use in both transmission and distribution grids, due to their reduced costs and high reliability. Especially in distribution grids, on which the voltage harmonic distortion limits are less restrictive, it may cause a considerable harmonic distortion impact when operating under non sinusoidal voltage conditions. Therefore, this paper describes a harmonic analysis methodology for the SVC, considering non-ideal source voltages, in order to determine harmonic power terms that may be used to design and also control harmonic power filters. Application examples are presented and the operation of an experimental SVC prototype is also analysed.