A novel DMC based SST for voltage and frequency regulation of PMSG based WECS

Abstract

This paper proposes a novel topology for voltage and frequency regulation of wind energy conversion systems (WECS) equipped with Permanent Magnet Synchronous Generators (PMSG) using Direct Matrix Converter (DMC) based Solid State Transformer (SST). The venturini algorithm along with voltage oriented vector control (VOC) method is applied for regulating the WECS power also known as Power Regulation Technique, which can effectively regulate the generated voltage and frequency at output side of DMC based SST. The variation in generated power with varying voltage & frequency due to the change in wind speed are processed by proportional & integral (PI) controllers to control the voltage gain of DMC, consequently it regulate the desired powers, voltage and frequency. Matlab/Simulink based model is tested for evaluating the performances of proposed scheme. From the simulation results it is confirm that PMSG based WECS under varying wind speed using SST with adequate input filters and proposed control scheme is able to directly fed power to the existing grid or local load at desired output frequency and voltage at nearly unitary input power factor.