Modelling Of PMSG Based Stand-Alone Wind Energy Conversion System for Domestic Applications

Abstract

This project works deals with the study of PMSG based low power standalone WECS and the flexibility in WECS that can be achieved for energizing varies types of DC as well as AC loads or for battery charging purpose in the remote places like hilly areas and/or islands, where the grid connections are difficult or almost impossible but are gifted with enormous amount renewable energy sources like solar and wind energy. Here the paper work includes the modelling, simulation and the hardware implementation of the closed loop buck converter (both voltage control method and current control method) using ARDUINO UNO microcontroller for the regulation of either output voltage or output current of the said DC-DC converter as per the load requirement. The PMSG-DC motor set is used to represent the in-lab WECS. With armature resistance control and field resistance control method the DC motor is operated at various speed in order to vary the output 3 AC voltage of the PMSG and that is further rectified using an uncontrolled rectifier. The variable rectified DC voltage is either regulated to a constant DC voltage to feed a constant voltage DC load like LED for lighting purpose or regulation of current can be done to charge a battery or to control the torque of a DC motor or further can be given to an AC load using either a 1 or 3 H-bridge inverter. Also an appropriate coding has been done in MATLAB environment to implement the hillclimbing MPPT algorithm to extract the maximum power from the available wind power. The simulation of the closed loop buck converter, the 1 H-bridge inverter using SPWM method is done in MATLAB environment and the hardware output are verified and matched with the simulation results.