Modeling and Analysis of Variable Speed Wind Turbine equipped with PMSG

Abstract

This paper presents the dynamic model and Detail Analysis of a Wind energy conversion system equipped with permanent magnet synchronous generator (PMSG). There are different types of synchronous generators, but the PMSG is chosen, in order to obtain its dynamic model. It offers better performance due to higher efficiency and less maintenance since it does not have rotor current and can be used without a gearbox, which also implies a reduction of the weight of the nacelle and a reduction of costs. Along with the PMSG, wind speed, wind turbine & drive train have been modelled and the mathematical equations that explain their behaviour have been introduced. The generator model is established in the dq-synchronous rotating reference frame. The wind turbine model details the mechanism of variable speed operation of the turbine. In order to verify the presented model simulations with MATLAB/Simulink software have been conducted. Simulation results prove the validity of the model. Moreover, the concept of the Maximum Power Point Tracking (MPPT) has been presented in terms of the adjustment of the generator rotor speed according to instantaneous wind speed.