| 适用于直驱式风电系统的Crowbar电路分析 |
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| 引用本文： | 胡书举,李建林,许洪华.适用于直驱式风电系统的Crowbar电路分析[J].电力建设,2007,28(9):0-0. |
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| 作者姓名： | 胡书举 李建林 许洪华 |
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| 作者单位： | 中国科学院电工研究所,北京市,100080;中国科学院研究生院,北京市,100049;中国科学院电工研究所,北京市,100080 |
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| 摘 要： | 新的电网规则要求风力发电系统具有低电压穿越能力, 直驱式风电系统通过增加Crowbar 保护电路, 可以极大地提高其故障穿越能力。基于对适用于直驱式风电系统Crowbar 保护电路的总结, 对常用的Crowbar保护方案进行了分类, 对其工作原理和实现方法进行了详细说明, 并讨论了各自的优缺点。分析表明, 直流侧Crowbar 保护电路是优选方案, 具有较低的成本和较高的可靠性; 串联辅助变换器Crowbar 保护电路补偿性能好, 响应速度快, 具有良好的应用前景。
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| 关 键 词： | 直驱式风电系统 变速恒频 电网电压跌落 低电压穿越 Crowbar电路 |
| 文章编号： | 1000-7229（2007）09-0044-04 |
| 收稿时间： | 2010-01-25 |
| 修稿时间： | 2007-04-16 |
Analysis of Crowbar Circuits Used in Direct-drive WTG Systems |
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| HU Shu-ju,LI Jian-lin,XU Hong-hua.Analysis of Crowbar Circuits Used in Direct-drive WTG Systems[J].Electric Power Construction,2007,28(9):0-0. |
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| Authors: | HU Shu-ju LI Jian-lin XU Hong-hua |
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| Affiliation: | 1.Institute of Electrical Engineering, Chinese Academy of Science, Beijing 100080, China; 2.Graduate School, Chinese Academy of Science, Beijing 100049, China |
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| Abstract: | New power grid regulation requires WTG systems have low voltage ride-through(LVRT) capability.By adding Crowbar protection circuits,the fault ride through capability of direct drive WTG systems can be greatly improved.This paper summarizes Crowbar protection circuits,categorizes commonly used for Crowbar protection schemes,elaborates on their principles and realizations,as well as discusses their own advantages and disadvantages.Analysis shows that Crow circuits are preferred in DC side and have low cost and high reliability;series auxiliary converter Crowbar circuits have favorable compensation performance,fast response and good prospects. |
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| Keywords: | direct-drive WTG system variable speed constant frequency grid voltage drop low voltage ride through Crowbar circuit |
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