Power quality improvement in wind energy conversion system using hybrid SVPWM inverter control technique for THD reduction

Abstract

Wind energy is an abundant and naturally occurring source of energy that is being widely researched and implemented in recent times on a global scale. Quality of power generated from these renewable energy systems greatly determines the efficiency of such implementations. This research paper investigates and proposes a hybrid control scheme for reducing the total harmonic distortion which severely degrades the quality of power from energy conversion systems. The proposed hybrid space vector modulation scheme is a variant and improvement of the conventional PWM schemes. The produce more fundamental components with least harmonics by combining the merits of sinusoidal PWM and triangular carrier signal. The proposed modulation scheme is implemented in a closed loop PI controller scheme and results have been compared against three variants of PWM techniques namely sinusoidal, random and space vector PWM techniques and a drastic reduction in THD and power spectral density is observed justifying the superior performance of the proposed hybrid control scheme.