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对模故障分量选相元件的一些探讨
引用本文:林湘宁,刘沛,刘世明,杨春明.对模故障分量选相元件的一些探讨[J].电工技术学报,2001,16(6):70-75.
作者姓名:林湘宁  刘沛  刘世明  杨春明
作者单位:1. 华中科技大学电力系,430074
2. 东方电子信息产业集团综自所,264001
摘    要:根据故障时系统参数的可能变化详细分析了模故障分量选相元件在各种类型故障情况下的性能 ,通过与相电流差突变量选相元件的比较 ,指出 ,对于实际故障 ,该选相元件并不能达到理论上的选择性 ,而且其在弱电源侧依然存在灵敏度不足的问题 ,但整体性能比前者稍优。在全面分析的基础上 ,提出了一种新型的选相方案。最后 ,利用EMTP仿真验证了新方案的有效性。

关 键 词:输电线路  选相元件  模故障分量
修稿时间:2001年1月10日

Studies on Phase-Selector Based on Modal Transformation and Fault Component
Lin Xiangning,Liu Pei,Liu Shiming.Studies on Phase-Selector Based on Modal Transformation and Fault Component[J].Transactions of China Electrotechnical Society,2001,16(6):70-75.
Authors:Lin Xiangning  Liu Pei  Liu Shiming
Affiliation:Lin Xiangning Liu Pei Liu Shiming(Huazhong University of Science and Technology 430074 China)Yang Chunming(Group of Dong Fang Electronic Information Industry Inc 264001 China)
Abstract:The behavior of a modal transformation based on fault component phase selector are discussed in detail with regard to the changes of the system parameters and fault types.In contrast to the phase selector using superimposed line current,it is figured out in this paper that this phase selector still can't attain the theoretic selectivity for a real fault,furthermore,the sensitivity still may be deficient when the relay is located on the side of weak source.However,the integral performance of this phase selector is slightly better than that of the phase selector based on superimposed line current.Thereby,a new scheme of phase selection is proposed.The effectiveness of the scheme is verified with the EMTP simulation.
Keywords:Transmission line  Phase selector  Modal transformation based on fault component  
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