| 双馈风电系统网侧变流器控制策略的改进 |
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| 引用本文： | 张克勤,钟鸣,王春宇.双馈风电系统网侧变流器控制策略的改进[J].电源学报,2013,11(1):112-116. |
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| 作者姓名： | 张克勤 钟鸣 王春宇 |
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| 作者单位： | 内蒙古工业大学电力学院,内蒙古工业大学电力学院,内蒙古工业大学电力学院 |
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| 摘 要： | 在传统的矢量控制策略下,当电网电压发生三相对称短路故障时双馈感应发电机(DFIG)变流器直流母线电压会产生剧烈波动,从而影响整个风电系统的稳定运行。为此,需要对DFIG网侧变流器控制策略进行改进。分析了电网电压三相对称跌落时引起直流母线电压波动的原因,并在此基础上提出了新型的前馈控制方法。当电网电压跌落时对网侧变流器电流参考值做必要修正,从而达到减小直流母线电压波动的目的。为了验证该控制方法的有效性,在PSCAD/EMTDC软件环境下建立了容量为2MW的DFIG风电系统模型,并在此模型下进行系统仿真。仿真结果显示,提出的前馈控制策略能够有效的减小直流母线电压的波动。
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| 关 键 词： | 风力发电 DFIG 网侧变流器 低电压穿越 控制策略 |
| 收稿时间： | 2012/9/24 0:00:00 |
| 修稿时间： | 2012/10/11 0:00:00 |
An Improved Control Strategy of Grid-side Converter for DFIG |
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| ZHANG Ke-qin,ZHONG Ming and WANG Chun-yu.An Improved Control Strategy of Grid-side Converter for DFIG[J].Journal of power supply,2013,11(1):112-116. |
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| Authors: | ZHANG Ke-qin ZHONG Ming and WANG Chun-yu |
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| Affiliation: | Institute of electric power, Inner Mongolia University of Technology,Institute of electric power, Inner Mongolia University of Technology,Institute of electric power, Inner Mongolia University of Technology |
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| Abstract: | The dc-lick voltage of back-to-back PWM converter for DFIG will fluctuate seriously when the grid fault occurred in the traditional control strategy with the grid voltage orientation, and the fluctuation of dc-link will affect the stability of the DFIG system. So the traditional control strategy should be improved to keep the dc-lick voltage stability. The reason of dc-lick voltage fluctuation is analyzed. An improved control strategy is proposed to limit the fluctuation of dc-link voltage. The simulation result have shown that the proposed strategy is effective in limiting the fluctuation of the dc-link voltage. |
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| Keywords: | wind power DFIG grid-side converter control strategy low voltage ride through |
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