| 引用本文: | 赖庆辉,钱国明,陈福锋,许庆强,兰金波,魏 曜.纵联零序方向元件的特殊问题分析及解决方案[J].电力自动化设备,2010,(12): |
| LAI Qinghui,QIAN Guoming,CHEN Fufeng,XU Qingqiang,LAN Jinbo,WEI Yao.Analysis of pilot zero-sequence directional protection special problems and solutions[J].Electric Power Automation Equipment,2010,(12): |
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| 摘要: |
| 讨论了纵联零序方向保护因为零序电压灵敏度不足而失效的各种情况，探讨了采用零序电压补偿措施的必要性。指出同杆并架的双回线若其中一回线因单相故障跳开，由于负荷转移相邻线会出现较大的零序电流，而两侧母线可能均无零序电压，此时投入零序方向电压补偿将造成无故障线路两侧纵联零序保护误跳闸。详细分析了双回线其中一回线单相跳开后影响两侧母线零序电压的因素，并以现场录波数据和仿真数据验证了理论分析的正确性。最后给出了能有效解决相关问题的纵联零序方向保护配置方案。 |
| 关键词: 纵联保护 零序方向 电压补偿 双回线 |
| DOI： |
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| Analysis of pilot zero-sequence directional protection special problems and solutions |
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LAI Qinghui1, QIAN Guoming2, CHEN Fufeng2, XU Qingqiang3, LAN Jinbo2, WEI Yao2
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1.Dehua County Power Supply Co.，Ltd.，Dehua 362500，China;2.Guodian Nanjing Automation Co.，Ltd.，Nanjing 210003，China;3.Jiangsu Electric Power Research Institute Co.，Ltd.，Nanjing 210036，China
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| Abstract: |
| Different conditions causing the sensitivity deficiency of pilot zero-sequence directional protection are analyzed and the necessity of adopting zero-sequence voltage compensation is discussed. It points out that，if one of the double-circuit lines is tripped for single-phase grounding fault，the load shifted to other line may produce large zero-sequence current while its buses at both sides may not present zero-sequence voltage，the application of zero-sequence voltage compensation will cause the maloperation of its pilot zero -sequence directional protections. The factors affecting the zero-sequence voltage of bus are analyzed in detail and proved by site recorded fault data and simulative data. Solutions are proposed to the configuration scheme of pilot zero-sequence directional protection. |
| Key words: pilot protection zero-sequence directional voltage compensation double-circuit line |
