A simplified control strategy for a high-power low-distortion synchronous link converter var compensator

A high power low distortion static var compensator is proposed in [1], The harmonics are eliminated by incorporating a low power IGBT based controlled current auxiliary converter in conjunction with a high power GTO based con verter, The current reference required by the auxiliary converter is calcul ated by an involved procedure which makes the overall compensation process complicated, In this paper a simplified control scheme for the var compensa tor of [1] is proposed. Effectiveness of the proposed scheme is investigate d for a case where the var compensator is specifically used for load compen sation and also for the case where it is used as a general purpose var gene rator. Detailed simulation studies of the schemes are presented. Experiment al results obtained from a laboratory prototype are provided to demonstrate the viability of the proposed method.