| 输电线路综合电流差动保护方案的研究 |
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| 作者单位： | 清华大学电机工程与应用电子技术系 北京100084(张宁，董新洲)，阿海珐输配电电能自动化与信息公司 英国斯塔福德郡ST174LX(薄志谦，A.KLIMEK) |
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| 摘 要： | 根据实现差动保护功能所需信息类型的不同,提出分相电流差动和综合电流差动的新分类方法,并列举已有的综合电流差动保护方案.在对已有方案的性能评估和分析基础上,给出负序电流与正序电流故障分量相配合的综合电流差动新原理.理论分析和EMTP仿真表明,该方案可以对各种类型的区内故障灵敏动作.
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| 关 键 词： | 综合电流 电流差动保护 灵敏系数 |
Research of synthetic current differential protection schemes for transmission lines |
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| ZHANG Ni,DONG Xin-Zhou,BO Zhi-qian,A.KLIMEK. Research of synthetic current differential protection schemes for transmission lines[J]. Journal of Changsha University of Electric Power(Natural Science Edition), 2007, 0(4) |
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| Authors: | ZHANG Ni DONG Xin-Zhou BO Zhi-qian A.KLIMEK |
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| Affiliation: | ZHANG Ni1,DONG Xin-Zhou1,BO Zhi-qian2,A.KLIMEK2 |
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| Abstract: | Current differential protection is classified into phase segregated current differential protection and synthetic current differential protection in the paper,according to the styles of the currents compared in the protection criteria.A number of existing synthetic current differential protection schemes are outlined and evaluate,and each of them has serious disadvantages.A novel synthetic current differential protection scheme using negative sequence current and positive sequence current fault component is proposed.Theoretic analysis and simulation studies show that the new scheme produces the excellent performance for all types of fault. |
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| Keywords: | Synthetic current Current differential protection Sensitivity coefficient |
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