New high-power low-distortion synchronous-link-converter VAr compensator

A novel high-power low-distortion static VAr compensator is proposed. The harmonics are eliminated by combining low-frequency high-power devices and high-frequency low-power devices. The effectiveness of the proposed scheme is investigated for a case where it is specifically used for load compensation and also for the case where it is used as a general-purpose VAr generator. A mathematical model of the VAr compensator is presented. Detailed simulation studies of the scheme are provided. Steady-state experimental results obtained from a scaled-down laboratory prototype are provided to demonstrate the viability of the proposed method.