This paper proposes a variable speed control scheme of grid-connected wind energy conversion system, WECS, using permanent magnet synchronous generator. The control algorithm tracking the maximum power for wind speeds below rated speed of wind turbines (WTs) and ensure the power will not exceed the rated power for wind speeds higher than the rated speed of wind turbine. The control algorithm employed fuzzy logic controller (FLC) to effectively do this job. The WT is connected to the grid via back-to-back pulse width modulation-voltage source converter (PWM-VSC). Two effective computer simulation software packages (PSIM and SIMULINK) have been used to carry out the simulation effectively where PSIM contains the power circuit of the WECS and MATLAB/SIMULINK contains the control circuit of the system. The control system has two controllers for generator side and grid side converters. The main function of the generator side controller is to track the maximum power from wind through controlling the rotational speed of the turbine using FLC. In the grid side converter, active and reactive power control has been achieved by controlling d-axis and q-axis current components, respectively.
Received 04 November 2012Accepted 11 March 2013Published online 03 April 2013
The authors acknowledge the College of Engineering Research Center and Deanship of Scientific Research at King Saud University in Riyadh for the financial support to carry out the research work reported in this paper.
Article outline: I. INTRODUCTION II. WIND ENERGY CONVERSION SYSTEM DESCRIPTION A. Wind turbine model B. PMSG model III. CONTROL OF THE GENERATOR SIDE CONVERTER IV. FUZZY LOGIC CONTROLLER FOR MPPT V. CONTROL OF THE GRID SIDE CONVERTER VI. SIMULATION RESULTS VII. CONCLUSION
Source:J. Renewable Sustainable Energy 5, 023125 (
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