郑涛;潘玉美;郭昆亚;王增平;孙洁;

• 1:新能源电力系统国家重点实验室(华北电力大学)
• 2:辽宁省电力有限公司沈阳供电公司

摘要(Abstract)：

提出了一种基于节点阻抗矩阵的配电网故障测距改进算法,故障后,系统的网络拓扑结构及参数会随之改变,引起节点阻抗矩阵的变化,形成故障后的节点阻抗矩阵,其中含有未知量故障距离和过渡电阻,利用节点阻抗的物理意义建立测距表达式。该算法仅需要变电站出线电压、电流作为输入量,迭代计算故障区段上游母线的电压、电流,代入已建立的测距表达式求出故障距离和过渡电阻;为适应配网中负荷特性不统一、时变的特点,提出采用静态电压特性的负荷模型模拟负荷,采用此模型可以更加精确地计算故障后各负荷及分支的分流,使得故障测距结果更加准确;并提出结合配电系统的馈线自动化功能减少伪故障点个数实现故障点的定位;文章最后在PSCAD中搭建配电网IEEE 34节点模型,在Matlab中实现文中提出的故障测距算法,仿真测试表明该算法的有效性。

关键词(KeyWords)： 配电网;故障测距;节点阻抗矩阵;静态电压特性负荷模型

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2012AA050208);; 国家电网公司科技项目(KJ[2012]1107)~~

作者(Author): 郑涛;潘玉美;郭昆亚;王增平;孙洁;

Email:

DOI: 10.13335/j.1000-3673.pst.2013.11.038

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