风电场短路电压电流频率不一致对距离保护及测试的影响

卜强生; 高磊; 宋亮亮; 宋爽; 陈宁; 高丙团

引用本文:	卜强生,高磊,宋亮亮,等.风电场短路电压电流频率不一致对距离保护及测试的影响[J].电力系统保护与控制,2015,43(8):21-27.
	BU Qiangsheng,GAO Lei,SONG Liangliang,et al.Short circuit current and voltage frequency inconsistency in wind farm and its effect on distance protection and relay protection test[J].Power System Protection and Control,2015,43(8):21-27

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风电场短路电压电流频率不一致对距离保护及测试的影响
卜强生¹, 高磊¹, 宋亮亮¹, 宋爽¹, 陈宁², 高丙团³
1.江苏省电力公司电力科学研究院，江苏南京 211113;2.中国电力科学研究院，江苏南京 210003;3.东南大学电气工程学院，江苏南京 210096

摘要:

基于双馈风机风电场的电力系统等效电路研究了输出线路短路故障点保护设备安装处的电压电流的频率成分，得出了含风电场的电力系统短路故障时所特有的电压电流频率的不一致性。基于Matlab/Simulink仿真平台验证了频率不一致的特性，总结过渡阻抗与短路点电压电流频率成分之间的关系。分析了电压电流频率的不一致性对于距离保护所产生的影响，研究了距离保护及其测试在风电场中存在的适应性问题。最后，算例仿真验证了分析结果的正确性，从而为风电场继电保护的设置和测试工作提供参考。

关键词: 风电场双馈风机距离保护频率不一致

DOI：10.7667/j.issn.1674-3415.2015.08.004

分类号:

基金项目:国家电网科技项目（52100113058M）；国家高技术研究发展计划(863计划)(2012AA050203)

Short circuit current and voltage frequency inconsistency in wind farm and its effect on distance protection and relay protection test

BU Qiangsheng¹, GAO Lei¹, SONG Liangliang¹, SONG Shuang¹, CHEN Ning², GAO Bingtuan³

1.Jiangsu Electric Power Company Research Institute, Nanjing 211113, China;2.China Electric Power Research Institute, Nanjing 210003, China;3.School of Electrical Engineering, Southeast University, Nanjing 210096, China

Abstract:

Firstly, based on the equal circuit of power grid with doubly fed induction generators (DFIG), the paper studies the frequency components of short circuit voltage and current in the place where the protection devices are equipped with. And the analyzing result leads to different frequency characteristics of voltage and current for wind farms during faults. Secondly, simulations based on Matlab/Simulink verifies the particular characteristics and yields the relationship between transition fault impedance and the characteristics of short-circuit voltage and current. Following the frequency’s feature of short circuit current, the reliability and adaptability of distance protection are analyzed. Finally, simulation results verify the adaptive failings of this traditional protection in wind farms, and the results also have some certain instructional significance to relay protection test.

Key words: wind farm doubly fed induction generators (DFIG) distance protection frequency inconsistency

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