Single-phase earth fault location method based on harmonic analysis for the NUGS

2016 ◽  
Author(s):  
Ning Tong ◽  
Jihan Liang ◽  
Hui Li ◽  
Xiangning Lin ◽  
Zhengtian Li
Keyword(s):  
Harmonic Analysis ◽  
Fault Location ◽  
Single Phase ◽  
Location Method ◽  
Earth Fault

Study on Single-Phase Earth Fault Location Method in Mine Non-Effectively Grounded Network Based on WAMS

2014 ◽  
Vol 602-605 ◽  
pp. 2110-2113
Author(s):  
Dan Lu ◽  
Jun Qiang Liu ◽  
Xiu Gang Yin
Keyword(s):  
Fault Location ◽  
Single Phase ◽  
Load Capacity ◽  
Logical Relationship ◽  
Location Method ◽  
Earth Fault ◽  
Zero Sequence ◽  
Supply Model ◽  
Relationship Of ◽  
New Location

In allusion to the low reliability and sensitivity of existing single-phase earth fault location method, this article proposed a new location method based on WAMS in mine non-effectively grounded network. It analyzed the logical relationship of zero-sequence current of each branch when single-phase earth fault occurred and deduced zero-sequence current formulae of each branch. The detailed description is given to calculating differential variable of zero-sequence current and explicating principle and realization of fault section location. The coal mine power supply model based on WAMS is introduced and the scheme was verified by simulation via MATLAB and calculation via Fast Fourier Transform. The results indicate that it avoids influences by load capacity and the voltage initial phase angle, then effectively enhances fault location reliability and sensitivity.

Transmission line fault location for single-phase-to-earth fault on non-direct-ground neutral system

1998 ◽  
Vol 13 (4) ◽  
pp. 1086-1092 ◽  
Author(s):  
Zhang Qingchao ◽  
Zhang Yao ◽  
Song Wennan ◽  
Fang Dazhong
Keyword(s):  
Transmission Line ◽  
Fault Location ◽  
Single Phase ◽  
Neutral System ◽  
Earth Fault

The Method Analysis of Overhead Transmission Line Single-Phase Grounding Fault Detection and Location

2014 ◽  
Vol 1030-1032 ◽  
pp. 1360-1365
Author(s):  
Yun Hong Dai ◽  
Shi Bin Liang ◽  
Ming Yao Hu ◽  
Ying Na Li ◽  
Zhen Gang Zhao ◽  
...  
Keyword(s):  
Fault Detection ◽  
Transmission Line ◽  
Fault Location ◽  
Single Phase ◽  
Small Current ◽  
Location Method ◽  
Overhead Transmission Line ◽  
Advantages And Disadvantages ◽  
Supply And Distribution ◽  
Space Truss

Small current grounding power system is widely used in overhead transmission line in medium voltage distribution network in China. Because of its long lines, branch, space truss structure is complex, low level of automation, It is easily influenced by outside force and the natural environment, and single-phase grounding failure rate is high. It is an important topic to quickly and accurately detect the location of the fault line, and improve the reliability of power supply and distribution system.This paper has carried on the induction and the comparison of various fault detection and location method of overhead transmission line which is currently used in single phase to ground, and analyzed their advantages and disadvantages,given the corresponding conclusions, provided the reference for finding out the reasonable single-phase earth fault location method or improvement.

Sign in / Sign up

Export Citation Format

Share Document