Single-Phase Grounding Fault Location Scheme Based on Levenberg-Marquarat Algorithm

被引：0
|
作者：
Ma W. [1 ]
Qiu Y. [2 ]
Ding D. [1 ]
Wu J. [1 ]
Wang Y. [3 ]
Lin S. [1 ]
Hou W. [1 ]
Zhang W. [1 ]
机构：
[1] State Grid Hangzhou Power Supply Company, Hangzhou, 310009, Zhejiang Province
[2] State Grid Zhejiang Electric Power Company, Hangzhou, 310009, Zhejiang Province
[3] School of Electrical and Electronic Engineering, North China Electric Power University, Changping District, Beijing
来源：
Ma, Wei (jnyz-mawei@163.com) | 2018年 / Power System Technology Press卷 / 42期
关键词：
Fault location; Levenberg-Marquarat algorithm; One-terminal information; Single-phase grounding fault; Transition resistance;
D O I：
10.13335/j.1000-3673.pst.2017.2450
中图分类号：
学科分类号：
摘要：
In view that accuracy of one-terminal fault location method can be improved effectively for transmission line realized using data of multi-time sections, a single-phase grounding fault location scheme based on information from different sampling points is proposed in this paper. Firstly, the current distribution coefficient is regarded as imaginary, and the equations with real and imaginary parts are established based on the measured voltage and current at relaying point after the fault. Then, the overdetermined equations where fault location is unknown are built based on information from two consecutive sampling points. Finally, the fault location is calculated using Levenberg-Marquara algorithm. Simulation results based on PSCAD/EMTDC show that, the scheme can calculate the fault location accurately, not affected by fault phase, location of fault point, transition resistance, line load and system impedance. Compared with the fault location scheme not regarding current distribution coefficient as real, the proposed scheme provides higher accuracy and more stable performance. © 2018, Power System Technology Press. All right reserved.
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页码：3049 / 3054
页数：5
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