直驱风力发电系统中多并网变流器直流链路电压控制的改进方法

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition Pub Date : 2009-03-21 DOI:10.1109/APEC.2009.4802938

Weihao Hu, Yue Wang, Xianwen Song, Zhaoan Wang

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引用次数: 9

摘要

为了减小各IGBT的电流，减少进入电网的谐波电流，采用了适用于大功率直驱风力发电系统的多路交-直流-交流全量程变换器。分析了并网变流器直流链路电压波动的原因。针对直驱风力发电系统中多个并网变流器直流链路电压的波动范围，提出了一种改进的直流链路电压控制方法。利用发电机功率和电网电压的瞬时反馈来改善直流链路电压的动态响应。仿真和实验结果验证了分析和结论。

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An Improved DC-Link Voltage Control Method for Multiple Grid Connected Converter in Direct Drive Wind Power Generation System

In order to reduce the current of each IGBT and reduce the harmonic current into the grid, a multiple AC-DC-AC full-scale converter which is suitable for high power direct drive wind power generation systems is adopted. The reasons of DC-link voltage fluctuation of the grid connected converter are analyzed. An improved DC-link voltage control method for multiple grid connected converter in direct drive wind power generation systems is proposed in this paper to limit the fluctuation range of the DC-link voltage. The instantaneous generator power and grid voltage feedbacks are used to improve the dynamic response of the DC-link voltage. Simulation and experimental results verify the analysis and the conclusion.

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2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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