基于阻抗法和行波法组合的输电线距离保护*

作者：海瑛1 ,钱苏翔1 ,严拱标2 日期：2008-08-18/span> 浏览：3881 查看PDF文档

基于阻抗法和行波法组合的输电线距离保护*

海瑛1 ,钱苏翔1 ,严拱标2
(1.嘉兴学院 机电工程分院,浙江 嘉兴 314001；2.浙江大学 机电工程学院,浙江 杭州 310027)

摘要：为了在某些特殊情况下，使用组合继电器提高保护的可靠性和速度，提出了一种基于阻抗法和行波法组合的距离保护方案。对于死区故障，采用了不受故障初始角及反射波等影响的阻抗法定位;对于一般性故障，采用了不受过渡电阻影响的行波法进行定位;将两种测量方法的优缺点互补组合，并进行了相应仿真试验。仿真试验结果表明：该保护方案能使继电器可靠、灵敏、高速地动作。
关键词：距离保护；故障定位；阻抗分析法；行波分析法；数字信号处理器
中图分类号：TM712文献标识码：A文章编号：1001-4551(2008)08-0083-04

Distance protection of transmission line based on combining the traveling wave
method and the impedance method
HAI Ying 1, Qian Su-xiang1, YAN Gong-biao2
(1.College of Mechanical & Electrical Engineering, Jiaxing University, Jiaxing 314001, China;
2.College of Mechanical & Electrical Engineering，Zhejiang University, Hangzhou 310027, China)
Abstract: For improving the reliability and speed of protection in special condition, a distance  protection  scheme based  on  combing the traveling wave method and the impedance method was presented. For locating the  dead zone  fault , impedance  protection method was adapted, the method was not affected by low inception angles  and  reflective traveling waves, etc. For locating the common fault , traveling wave method was used, which was not affected by the transition resistance at the faulty position. Advantages of two  method were utilized and their disadvantages were avoided, simulation tests show that the protection  scheme can make the relay to response reliable, sensitive and at high-speed.
Key words: distance protection; fault location; impedance method；traveling wave method; digital signal processor(DSP)
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