| 引用本文: | 李啸骢,黄维,黄承喜,等.基于Crowbar保护的双馈风力发电机低电压控制策略研究[J].电力系统保护与控制,2014,42(14):67-71. |
| LI Xiao-cong,HUANG Wei,HUANG Cheng-xi,et al.Analysis of doubly-fed wind power generator low voltage control strategy based on Crowbar protection[J].Power System Protection and Control,2014,42(14):67-71 |
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| 摘要: |
| 针对双馈风力发电机在电压大幅骤降时投入Crowbar电路后引起直流侧过电压和动态无功补偿的问题，基于反馈线性化理论，提出了对网侧变频器进行非线性控制策略。通过协调控制STATCOM对电网进行动态无功补偿。仿真表明：网侧非线性控制器在电压骤降过程中能很好地抑制直流侧过电压；通过引入STATCOM补偿装置，很好地满足系统无功需求，证实了所提出控制策略的正确性，提高了系统的低电压穿越能力。 |
| 关键词: 双馈风力发电机 低电压穿越 电压跌落 网侧变换器 静止无功补偿 |
| DOI：10.7667/j.issn.1674-3415.2014.14.011 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51267001)；广西科学基金资助项目(桂科自0728027)；南宁市市校科技合作专项项目(200801029D)；北海市市校科技合作专项项目(北科合200801027) |
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| Analysis of doubly-fed wind power generator low voltage control strategy based on Crowbar protection |
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LI Xiao-cong, HUANG Wei, HUANG Cheng-xi, LU Jian-cheng, ZHA Zhong-kui, XI Yun
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College of Electrical Engineering, Guangxi University, Nanning 530004, China
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| Abstract: |
| Aiming at the problems of the DC over-voltage and the dynamic reactive power compensation, which caused by the doubly-fed wind generator switch Crowbar circuit when the grid voltage dips, and basing on the feedback linearization theory, the nonlinear control strategy on grid-side converter is proposed. This paper adopts a coordinated control STATCOM to compensate the dynamic reactive power of the grid. Simulation result shows that, the grid-side nonlinear controller can well restrain the DC over-voltage during the grid voltage dip, and meet the requirements of system reactive power by introducing a STATCOM compensation device. The result also confirms the correctness of the control strategy, which improves the ability of low voltage ride through (LVRT) of the system. |
| Key words: doubly-fed induction generator (DFIG) low voltage ride through (LVRT) voltage dip grid-side converter STATCOM |
