A Grounding Fault Location Method for Petal-type Urban Power Grid Based on Zero-Sequence Current Correlation

2019 ◽  
Author(s):  
ZiGang Zhao ◽  
ShaoBo Geng ◽  
YaKun He ◽  
XiaoLong Chen ◽  
Shu Yuan ◽  
...  
Keyword(s):  
Fault Location ◽  
Power Grid ◽  
Location Method ◽  
Current Correlation ◽  
Zero Sequence ◽  
Grid Based

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.

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