Novel Fuzzy Based Modeling and Control of Direct Control Variable Speed Wind Turbine with Interior Permanent Magnet Synchronous Generator

Abstract

This paper proposes a noval fuzzy based drive on several aspects of modelling and control of interior permanent magnet (IPM) synchronous generator based grid connected variable speed wind turbine with maximum power extraction (MPE). In this method, the requirement of the continuous rotor position is eliminated as all the calculations are done in the stator reference frame. This thesis presents simple practical methods of determining parameters such as magnet flux, and, d- and q-axes inductances of an IPM synchronous generator. The Fuzzy based direct control scheme is simpler and can eliminate some of the drawbacks of traditional indirect vector control scheme. The proposed control scheme is implemented in MATLAB/Simpower systems and the results show that the controller can operate under constant and varying wind speeds. Finally, a sensorless speed estimator is implemented, which enables the wind turbine to operate without the mechanical speed sensor. The simulation and experimental results for the sensorless speed estimator are presented.

Index Terms—Direct control; interior permanent magnet (IPM) synchronous generator; sensorless speed estimator; Fuzzy