| It is a inexorable trend for Wind Power Generation System (WPGS) to be integrated intopower grid cosmically in order to cope with the shortage of energy and the crisis ofenvironmental pollution. In the other side, power electronic equipments, which bring largeamount of harmonic into grid, are used more and more frequency.The implement ofMaximum Power Point Tracking g (MPPT) and the filtering of harmonic can make efficientuse of wind energy and improve the quality of electric power. Consequently, the study ofWPGS control strategy, including MPPT and grid connected control with Active PowerFiltering (APF), has theoretical and practical significance.A combination control strategy of WPGS to improve quality of power and keep the highutilization efficiency of wind energy is proposed in this thesis. The topological structure,mathematic model of wind turbine, driving system and generator are deeply investigated. Anew method of MPPT is proposed based on the feedback signal method. At the same time, anew wind farm grid-connected control strategy which can realize active power filtering isproposed for harmonic administer, improving the quality of power by take full advantage ofgrid-connected inverter. The harmonic current is calculated by the theory of instantaneousreactive power. A deadbeat control strategy, which is a predictive control method that caninsure the current output accurately equal to the injunction, is applied to realize the control ofgrid-connected inverter. The control strategy is analyzed and verified by simulation withMatlab/Simulink. The results prove the feasibility of the strategy presented above. |
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