A novel compensation system for standalone wind-energy induction generator scheme

This paper presents a low cost voltage stabilization scheme for standalone wind energy utilization scheme using an induction generator. The voltage stabilization regulator ensures near-stable voltage at load terminals under wind gusting and load excursions. The scheme comprises a fixed large capacitor for self-excitation and a small capacitor controlled by a pulse width modulated control strategy enacted during terminal voltage variations due to wind speed gusting and/or local load variations. Simulation results validated the concept of pulse width modulated capacitor switching that extends the voltage stability margin and prevents loss of excitation and voltage collapse.