In this paper, a different control strategy of a small wind generator, including a permanent magnet synchronous machine (PMSM), has been studied. The objective is to analyze the produced power quality of small wind turbines connected to weak AC grids. The extraction of the electrical energy from the wind turbine is based on a maximum power point tracking (MPPT) algorithm to control a pulse width modulation (PWM) rectifier. The grid connection is realized by means of a PWM voltage source inverter via a filter. This inverter is controlled by three different methods based on current or active and reactive power control. These methods are applicable for different power ranges. The obtained results demonstrate the efficiency of the system and the energetic contribution, mainly for rural weak AC grids.

Issue Section:
Research Papers
Keywords:
wind turbines, permanent magnet motors, synchronous motor drives, machine control, PWM rectifiers, PWM invertors, electric current control, reactive power control, power supply quality, wind energy conversion, variable speed, direct-drive system, current control, power control, maximum power point tracking
Topics:
Control equipment, Currents, Filters, Generators, Machinery, Permanent magnets, Turbines, Wind, Wind turbines, Wind velocity, Algorithms, Torque, Wind power, Wind energy
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Copyright © 2007
 by American Society of Mechanical Engineers
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