| 引用本文: | 姜惠兰,周陶,贾燕琪,陈娟,张弛,周照清,薛静玮.提高DFIG低电压穿越性能的转子Crowbar自适应切除控制方法[J].电力自动化设备,2018,(9): |
| JIANG Huilan,ZHOU Tao,JIA Yanqi,CHEN Juan,ZHANG Chi,ZHOU Zhaoqing,XUE Jingwei.Adaptive deactivating control strategy of Crowbar for LVRT capability enhancement of DFIG[J].Electric Power Automation Equipment,2018,(9): |
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| 摘要: |
| 针对Crowbar传统控制策略的不足，推导了双馈风力发电机(DFIG)在系统发生三相短路且转子Crowbar电路切除后的转子电流表达式，并提出了一种转子Crowbar自适应切除控制策略。假设当前时刻切除Crowbar，实时计算将出现的转子电流最大值，并在该最大值小于Crowbar动作阈值时将Crowbar切除，保证以Crowbar不会反复投切为前提尽早切除Crowbar，达到从系统少吸收无功和延长Crowbar开关器件使用寿命的目的。通过MATLAB/Simulink仿真验证了所提控制方法的有效性。 |
| 关键词: 双馈风力发电机 低电压穿越 Crowbar 自适应控制 风电 |
| DOI：10.16081/j.issn.1006-6047.2018.09.014 |
| 分类号:TM614 |
| 基金项目:国家自然科学基金资助项目(51477115) |
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| Adaptive deactivating control strategy of Crowbar for LVRT capability enhancement of DFIG |
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JIANG Huilan, ZHOU Tao, JIA Yanqi, CHEN Juan, ZHANG Chi, ZHOU Zhaoqing, XUE Jingwei
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Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
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| Abstract: |
| In view of the imperfect performance of conventional Crowbar control strategy, the rotor current after deactivating Crowbar under three-phase short circuit of the DFIG(Doubly-Fed Induction Generator) system is deduced, and an adaptive deactivating control strategy of Crowbar is proposed. The maximum value of the rotor current that will appear is real-timly calculated assuming cutting off the Crowbar circuit at the current moment, and then the Crowbar is deactivated when the calculated maximum value is less than the operating value of Crowbar. It is ensured that the Crowbar is deactivated as soon as possible without the possibility of being reactivated, and the purpose of reducing the absorbed reactive power from the system as well as prolonging the service life of the switching devices can be achieved. Simulative results with MATLAB/Simulink verify the effectiveness of the proposed control strategy. |
| Key words: doubly-fed induction generator low voltage ride-through Crowbar adaptive control wind power |
