| 引用本文: | 冯雷,蔡泽祥,王奕,刘平.双馈风电机组低压穿越特性对电力系统暂态稳定的影响[J].电力自动化设备,2018,(3): |
| FENG Lei,CAI Zexiang,WANG Yi,LIU Ping.Impact of DFIG LVRT characteristics on transient stability of power system[J].Electric Power Automation Equipment,2018,(3): |
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| 摘要: |
| 双馈风电机组(DFIG)的低压穿越(LVRT)特性与同步发电机不同，使得大规模DFIG接入电力系统后同步发电机的功角特性发生改变，因此分析系统暂态稳定性时有必要考虑DFIG LVRT行为的特殊性。推导机电暂态时间尺度下DFIG撬棒未投入和投入2种工况下的等值模型，基于该模型对典型LVRT策略下DFIG的外特性进行分析；基于等面积定则研究DFIG LVRT策略中无功补偿系数与撬棒电阻对电力系统暂态稳定的影响。时域仿真结果表明，提高无功补偿系数和增加撬棒电阻有利于电力系统的暂态稳定性，验证了理论分析的正确性。 |
| 关键词: 电力系统 双馈风电机组 低压穿越 撬棒电阻 暂态稳定 等面积定则 |
| DOI：10.16081/j.issn.1006-6047.2018.03.003 |
| 分类号:TM614;TM712 |
| 基金项目:广东省自然科学基金资助项目(2017A030313288) |
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| Impact of DFIG LVRT characteristics on transient stability of power system |
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FENG Lei1, CAI Zexiang1, WANG Yi2, LIU Ping1
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1.School of Electric Power, South China University of Technology, Guangzhou 510640, China;2.Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China
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| Abstract: |
| The LVRT(Low-Voltage Ride-Through) characteristics of DFIG(Doubly-Fed Induction Generator) is different from that of synchronous generator, which makes the rotor angle characteristics of synchronous generator change after large scale DFIGs integrated into the power system, so it is necessary to consider the particularity of DFIG LVRT behavior when analyzing transient stability of power system. The equivalent models of DFIG with and without Crowbar on an electromechanical time scale are deduced, on this basis, the external characteristics of DFIG under typical LVRT strategy is analyzed. The impact of reactive power compensation coefficient and Crowbar resistance in DFIG LVRT strategy on transient stability of power system is researched based on equal area criterion. The time-domain simulative results show that the increase of reactive power compensation coefficient and Crowbar resistance is helpful for the transient stability of power system, verifying the correctness of the theoretical analysis. |
| Key words: electric power systems DFIG LVRT Crowbar resistance transient stability equal area criterion |
