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| Operation and Control on the Grid-Side Converter of the Directly-Driven Wind Turbine With PM Synchronous Generator During Asymmetrical Faults |
| Huang Shoudao, Xiao Lei, Huang Keyuan, Chen Ziqiang, Xiong Shan |
| Hunan University Changsha 410082 China |
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Abstract Fluctuation mechanism on DC voltage of converter and stability control strategy in order to improve the capability of faults ride through were studied when asymmetry faults took place. By the introduction of proportional-integral-resonant controller to grid-side converter, and steady-state non-poor regulation for positive and negative sequence current in the positive-sequence synchronous rotating frame, a new control algorithm was proposed to eliminate the quadratic fluctuations of DC voltage caused by the negative-sequence current out of control, and maintain the wind turbine stable. Simulation and experimental results show that the proposed control algorithm can effectively control positive and negative-sequence currents in the positive-sequence synchronous rotating frame, and eliminate the DC voltage fluctuation.
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Received: 14 May 2010
Published: 07 March 2014
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2011, Vol. 26 
