Small-scale wind turbine coupled single-phase self-excited induction generator with SVC for isolated renewable energy utilization

In this paper, the static VAR compensator (SVC) composed of the fixed excitation capacitor(FC) in parallel with the thyristor switched capacitor (TSC) and the thyristor controlled reactor (TCR) is applied to regulate and stabilize the generated terminal voltage of the single-phase self-excited induction generator (SEIG) for the passive load variations and the prime mover speed changes. The conventional fixed gain PI controller is employed to adjust the equivalent capacitance of the single-phase SVC in the output of the single-phase SEIG. The closed-loop terminal voltage responses due to different inductive passive load disturbances in the single-phase SEIG using the single-phase SVC with the PI controller are considered and discussed herein. A prototype setup for the single-phase SEIG with SVC voltage regulation feedback control scheme is implemented. The experimental results of this power conditioner are illustrated and give good agreements with the digital simulation results.