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銆€銆€闂�(gu膩n)閸佃锛�棰�(f膿ng)鍔涚櫦(f膩)闆昏畩娴佸櫒锛涙案纾佺櫦(f膩)闆绘(j墨)锛涗綆闆诲绌胯秺锛�

      Research on the Low Voltage Ride through Capability of Directly-driven PM Wind Generation System

      Abstract: The control strategy for directly driven wind turbine with permanent magnet synchronous generator was investigated to enhance its capacity of low voltage ride through (LVRT). The mathematical model of PWM converter is studied, and the power's transformation is analyzed. The controller of grid-side converter uses voltage-oriented vector control strategy and the controller of motor-side converter uses the rotor flux-oriented vector control strategy. That established a good theoretical basis for the direct drive permanent magnet wind power system low voltage ride through technology.

      This paper describes power storage crowbar and the demand of reactive power when grid voltage dips. The paper presents a new power control strategy, when the grid-side converter is failure. Then simulation results verify the effectiveness of the control strategy. Then, the study puts forward a set of control logic for the based low voltage ride through. In the directly-driven permanent magnet wind power system simulation platform built with Matlab/Simulink, the low voltage ride through of directly-driven PM wind generation system is achieved by using the power storage crowbar and reactive power control strategy during the breakdown time.

      Key words锛�Wind Power Converter; Permanent Magnet Synchronous Motor; Low Voltage Ride Through

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