| 电网不对称故障下直驱风电机组低电压穿越技术 |
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| 引用本文： | 赵紫龙,吴维宁,王伟.电网不对称故障下直驱风电机组低电压穿越技术[J].电力系统自动化,2009,33(21):87-91. |
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| 作者姓名： | 赵紫龙 吴维宁 王伟 |
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| 作者单位： | 国网电力科学研究院/南京南瑞集团公司,江苏省南京市,210003 |
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| 基金项目： | 国家高技术研究发展计划（863计划） |
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| 摘 要： | 分析了直驱风电变流器在电网不对称情况下的表现,提出一种适用于该情况的网侧变流器控制策略,并将其与直流侧Crowbar电路配合,实现电网不对称故障下的低电压穿越.直驱风电机组与电网间的功率交换完全通过变流器实现,电网不对称故障引起的有功功率波动在变流器上表现为直流侧电压大幅波动.控制策略以稳定输出有功功率为目标,基于同步旋转坐标系和正负序分解得出控制模型,并综合考虑电流安全限值、系统复杂程度等问题,给出额定功率附近运行时发生不对称故障的穿越方案.使用MATLAB建立仿真模型,给出不对称故障下的仿真结果,证明方案可行性.
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| 关 键 词： | 直驱 风力发电 不对称故障 低电压穿越 电压源型变流器 |
| 收稿时间： | 5/4/2009 6:47:53 PM |
| 修稿时间： | 2009/10/22 0:00:00 |
A Low Voltage Ride Through Technology for Direct-drive Wind Turbines Under Unbalanced Voltage Dips |
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| ZHAO Zilong,WU Weining,WANG Wei.A Low Voltage Ride Through Technology for Direct-drive Wind Turbines Under Unbalanced Voltage Dips[J].Automation of Electric Power Systems,2009,33(21):87-91. |
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| Authors: | ZHAO Zilong WU Weining WANG Wei |
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| Affiliation: | ZHAO Zilong,WU Weining,WANG Wei(State Grid Electric Power Research Institute,Nanjing 210003,China) |
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| Abstract: | The response of direct-drive wind turbine converters under unbalanced grid conditions is analyzed.A control strategy in this condition is proposed,which coordinates the converter with the DC side Crowbar circuit during unbalanced voltage dips.Since the direct-drive wind turbines exchange full power with grid via converters,the fluctuation of active power caused by unbalanced voltages will lead to DC-link voltage ripples.The control strategy aims to stabilize the active power outputs.The control model is bas... |
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| Keywords: | direct drive wind power unbalanced fault low voltage ride through(LVRT) voltage source converter(VSC) |
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