Single-Phase Power Generation Employing VFC for Stand-Alone Three-Phase Doubly Wound Asynchronous Generator

This paper presents a stand-alone doubly wound asynchronous generator (DWAG) employed for feeding single-phase loads with harmonic compensation. Pulsewidth modulation controlled back-to-back-connected voltage-source converters (VSCs) are used with a battery-supported common dc link. The stator converter (SC) with a star-delta-connected transformer is used to provide functions of a load leveler, a current balancer, and a harmonics eliminator. The rotor converter (RC) is used to achieve maximum power tracking along with control of voltage and frequency at DWAG stator under varying rotor speeds. Both VSCs are controlled in vector oriented control mode to achieve robust dynamic response. The proposed control scheme for SC and RC is realized using a digital signal processor. Performance of developed system is demonstrated under linear and nonlinear loads using simulation and experimental results.