基于双端同步电压相量的故障测距新算法

作者：赵伟，王波 日期：2009-06-17/span> 浏览：4059 查看PDF文档

基于双端同步电压相量的故障测距新算法

赵伟，王波
(浙江大学 电气工程学院，浙江 杭州 310027)

摘要：针对电子系统中的故障定位问题，提出了一种仅利用线路两端电压相量实现传输线路故障测距的新方法。该方法首先运用对称分量法和线性叠加原理建立故障后的附加正序网络，并且定义了故障点的电压相量平衡指标，进而基于该指标运用遍历搜索方法寻找故障点的位置。该算法仅利用电压相量进行计算，避免了由电流互感器饱和所带来的误差影响。PSCAD仿真实验表明，该算法能够有效地定位故障，并且不受故障类型、过渡电阻等因素的影响。
关键词：故障测距；电压相量；正序附加网络;对称分量法
中图分类号：TM711文献标识码：A文章编号：1001-4551(2009)05-0024-03

Fault location for twoterminal transmission lines using voltages phasor
ZHAO Wei, WANG Bo
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027,China)
Abstract: Aiming at the problem of fault location in the power system, an fault location algorithm using synchronized voltage phasor was proposed. Basing on symmetrical component method and linear superposition principle, the additional positive sequence network was established. Then the balance index on fault point was proposed and with this index the fault was located by traversing search method. By only using synchronized voltage phasor, the fault location accuracy of this method was not affected by the saturation of current transformer. The simulations carried out by PSCAD justify that this method can effectively locate the fault and is not affected by types of faults and transition resistances.
Key words: fault location; voltage phasor; additional positive sequence network; symmetrical component method
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