| 引用本文: | 栗 然,王 倩,卢 云,刘会兰,祝晋尧.Crowbar阻值对双馈感应发电机低电压穿越特性的影响[J].电力自动化设备,2014,34(4): |
| LI Ran,WANG Qian,LU Yun,LIU Huilan,ZHU Jinyao.Impact of Crowbar resistance on low voltage ride through of DFIG[J].Electric Power Automation Equipment,2014,34(4): |
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| 摘要: |
| 研究了Crowbar 阻值选取对双馈感应发电机低电压穿越的影响。从功率耗损的角度对Crowbar 阻值与定、转子暂态直流磁链的衰减关系进行推导分析；讨论了Crowbar 阻值对低电压穿越下双馈感应发电机电磁转矩的影响；提出了通过在Crowbar回路中串联附加电感的方法抑制电压跌落瞬间电磁转矩的振荡。研究表明，过大或过小的Crowbar阻值都将削弱双馈感应发电机低电压穿越能力，Crowbar 阻值的选取存在最优值，附加串联电感在一定程度上可以抑制电磁转矩暂态振荡。 |
| 关键词: 风电 双馈感应发电机 低电压穿越 Crowbar保护 阻值整定 串联电感 |
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| Impact of Crowbar resistance on low voltage ride through of DFIG |
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LI Ran, WANG Qian, LU Yun, LIU Huilan, ZHU Jinyao
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources，
North China Electric Power University，Baoding 071003，China
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| Abstract: |
| The impact of Crowbar resistance on LVRT （Low Voltage Ride Through） of DFIG （Doubly Fed Induction Generator） is researched. The relationship between the Crowbar resistance and the transient DC flux of stator and rotor is derived；the impact of Crowbar resistance on the electromagnetic torque of DFIG during LVRT is discussed；and it is proposed to add a series inductor in Crowbar circuit to suppress the electromagnetic torque oscillation caused by voltage drop. Results show that，either too large or too small Crowbar resistance may weaken the ability of DFIG LVRT，the optimal Crowbar resistance should be selected and the additional series inductor suppresses the transient oscillation of electromagnetic torque. |
| Key words: wind power doubly fed induction generator low voltage ride through Crowbar protection resistance setting series inductance |
