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中国电机工程学报 2007, 27(17) 103-108 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 发电 |
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变速恒频双馈风力发电机投切控制策略 |
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杨淑英 张兴 张崇巍 谢震 曹仁贤 |
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合肥工业大学电气与自动化工程学院 合肥工业大学电气与自动化工程学院 合肥工业大学电气与自动化工程学院 合肥工业大学电气与自动化工程学院 合肥阳光电源有限公司 |
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摘要：
对几种变速恒频双馈风力发电投切控制策略进行深入的研究。基于电压开环控制的投切控制策略，虽具有较好的稳定性，但空载定子电压的控制精度受到限制；基于电压有效值闭环的投切控制策略，虽能提高定子空载电压的控制精
度，但在定子电压的三相对称性及定子电压幅值的波动方面仍存在欠缺；基于空间电压矢量闭环控制的投切控制策略，若采用特定的调节器设计，不仅能确保电压控制精度，而且可以有效抑制定子电压幅值的波动。针对基于空间电压矢量闭环控制的这一投切方案，在PI调节器控制的基础上提出了自适应谐振调节器与PI调节器并行控制的控制策略，有效抑制了定子电压幅值的波动，使定子电压具有较好的控制响应，进而实现了双馈风力发电机零电流切入电网的目的。仿真与试验验证了理论分析及方案设计的正确性。
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关键词：
投切控制
空载定子电压
变速恒频
风力发电
双馈电机
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Cut-in/out Control Strategies for Doubly Fed Induction Generator Driven by Variable-speed Wind Turbine |
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Abstract:
Several cut-in control strategies for doubly fed induction generator (DFIG)-based variable-speed constant- frequency (VSCF) wind power generation are studied in the paper. The stator voltage open loop control-based cut-in control strategy is easy to be tuned, but the control precision of the no-load stator voltages cannot be guaranteed. In another control strategy with stator voltage RMS close loop control, the control precision is improved, however, the disadvantages in stator voltage symmetry and in no-load stator voltage waving are still not improved very well. The control strategy with stator voltage space vector close loop control not only can guarantee the control precision of the stator voltages, but also can eliminate the stator voltage waving at slip frequency, when a specific controller is adopted. For the voltage space vector close loop control-based strategy, based on the proportional-plus-integral (PI)-based control scheme, a new control scheme composed of an adaptive resonant controller and a PI controller is proposed in the paper, by which the stator voltage waving is almost elimited, and a very well control performance is achieved for stator voltages, naturally, the softly cut-in control is realized. The results of simulation and experiments have validated the theoretical analysis and the designs of the cut-in/out control strategies.
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Keywords:
cut-in/out control
no-load stator voltages
variable-speed constant-frequency
wind power generation
doubly fed induction generator
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收稿日期 2006-07-04 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 杨淑英 |
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作者简介: |
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作者Email: yangsyhfah@sohu.com;yangsyhfah@sina.com |
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| Copyright by 中国电机工程学报 |
