基于故障电流分布因子的单端故障定位方法

为了实现电力电缆的精确定位，提出了一种基于故障电流分布因子的单端故障定位方法。该方法首先根据Kirchhoff电压定理对电力系统等效模型建立表达式，然后检测线路单端三相电压、电流的正序、负序以及零序分量，接着引入故障电流分布因子，用故障类型的加权系数以及故障电流增量值替代故障电流，建立故障定位函数，最后检测出故障距离。仿真实验表明该方法鲁棒性强且具有较高的精确性。...

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Bibliographic Details
Published in电测与仪表 Vol. 55; no. 1; pp. 126 - 130
Main Author 程志友;李小静;汤明金;夏霜
Format Journal Article
LanguageChinese
Published 安徽大学电子信息工程学院,合肥230601%安徽大学电子信息工程学院,合肥,230601 2018
教育部电能质量工程研究中心,合肥230601
Subjects
加权系数
单端
故障定位
故障电流分布因子
电力电缆
单端
故障定位
故障电流分布因子
fault location
weighting coefficient
加权系数
电力电缆
power cable
fault current distribution factor
single terminal
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ISSN1001-1390
DOI10.3969/j.issn.1001-1390.2018.01.021

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Summary:为了实现电力电缆的精确定位，提出了一种基于故障电流分布因子的单端故障定位方法。该方法首先根据Kirchhoff电压定理对电力系统等效模型建立表达式，然后检测线路单端三相电压、电流的正序、负序以及零序分量，接着引入故障电流分布因子，用故障类型的加权系数以及故障电流增量值替代故障电流，建立故障定位函数，最后检测出故障距离。仿真实验表明该方法鲁棒性强且具有较高的精确性。
Bibliography:power cable, fault location, single terminal, fault current distribution factor, weighting coefficient
In order to achieve pkecise positioning of power cable, a single terminal fauh location method based on the fault current distribution factor is proposed in this paper. According to the Kirchhoff theorem of voltage, the expression on power system equivalent model is established. Then, the positive sequence, negative sequence and zero sequence components of single terminal three-phase voltage and current from one end of the line are detected. After that, the fault current distribution factor is introduced, and the fault current is replaced by the weighting coefficient of the fault type and increment value of fault current. Finally, the fault location function is established and the fault distance is detected. Simulation results show that the proposed method has strong robustness and high accuracy.
23-1202/TH
Cheng Zhiyou1,2, Li Xiaojing2, Tang Mingjin2, Xia Shuang2 （1. Power Quality Engineering Research Center,
ISSN:1001-1390
DOI:10.3969/j.issn.1001-1390.2018.01.021