Journal of Energy Resources Technology-Transactions of The ASME, Vol.129, No.3, 200-213, 2007
Investigation of different methods to control a small variable-speed wind turbine with PMSM drives
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 A C grids.
Keywords:wind energy conversion;variable speed;direct-drive system;current control;power control;maximum power point tracking