| 引用本文: | 马 静,丁秀香,林湘宁,黄天意,王增平.考虑变流器暂态调控的双馈风电机组三相短路电流计算方法[J].电力自动化设备,2016,36(4): |
| MA Jing,DING Xiuxiang,LIN Xiangning,HUANG Tianyi,WANG Zengping.Three-phase short circuit current calculation considering converter transient regulation for doubly-fed wind-power generator[J].Electric Power Automation Equipment,2016,36(4): |
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| 摘要: |
| 电网发生故障情况下，双馈风力发电机（DFIG）受电机电磁暂态和变流器调控的耦合影响，短路特性更为复杂。针对该问题，提出一种综合考虑网侧和转子侧变流器暂态调控下，双馈风力机组定转子短路电流的计算方法。首先，建立考虑转子侧变流器控制的DFIG故障等值网络，并推导该网络下定转子电流的解析式，在此基础上，计及直流母线电压波动情况，定量描述短路过程中网侧变流器双环暂态调控过程，据此揭示定子短路电流二倍频谐波分量的产生机理，并推导谐波分量的表达式，最终得到定转子全电流解析式。仿真结果验证了所提方法的正确性及可行性。 |
| 关键词: 双馈机组 风电 短路电流 转子侧变流器 网侧变流器 直流母线电压波动 二倍频谐波 |
| DOI： |
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| 基金项目:国家重点基础研究发展计划（973计划）项目（2012-CB215206）；中央高校基本科研业务费专项资金资助项目（2014 -ZZD02）；北京市科技新星项目（Z141101001814012）；霍英东基金资助项目（141057） |
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| Three-phase short circuit current calculation considering converter transient regulation for doubly-fed wind-power generator |
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MA Jing,DING Xiuxiang,LIN Xiangning,HUANG Tianyi,WANG Zengping
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1.State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources，North China Electric Power University，Beijing 102206，China;2.State Key Laboratory of Advanced Electromagnetic Engineering and Technology，Huazhong University of Science and Technology，Wuhan 430074，China
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| Abstract: |
| The short circuit characteristic of DFIG（Doubly-Fed Induction Generator） becomes more complicated during the grid fault because of the motor electromagnetic transient effect coupled with the inverter regulation，aiming at which，a method considering the transient adjustments of GSC（Grid-Side Converter） and RSC（Rotor-Side Converter） is proposed for calculating the stator and rotor short circuit currents of DFIG. The DFIG fault equivalent network considering RSC control is established and an analytical formula of stator or rotor current in this network is derived，based on which and with the consideration of DC bus voltage fluctuation，the dual-loop transient control process of GSC during the short circuit is quantitatively described，the mechanism of double-frequency harmonic component generation in the stator short circuit current is revealed，the expression of harmonic component is derived，and the analytic formula of stator or rotor full current is finally obtained. The simulative results verify the correctness and feasibility of the proposed method. |
| Key words: doubly-fed induction generator wind power short circuit currents rotor-side converter grid-side converter DC bus voltage fluctuation double-frequency harmonic |
