A new fault location method avoiding wave speed and based on traveling waves for EHV transmission line

2008 ◽  
Author(s):  
Zhang Feng ◽  
Liang Jun ◽  
Zhang Li ◽  
Yun Zhihao
Keyword(s):  
Transmission Line ◽  
Traveling Waves ◽  
Wave Speed ◽  
Fault Location ◽  
Location Method

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.

Travelling Wave Fault Location for Distribute Cable Network Based on Distributed Measurement

2013 ◽  
Vol 373-375 ◽  
pp. 976-980
Author(s):  
Yan Xu ◽  
Shi Qiu ◽  
Di Feng Shi ◽  
Guo Lin Huang
Keyword(s):  
Wave Speed ◽  
Fault Location ◽  
Travelling Wave ◽  
Transient Wave ◽  
Grounding Resistance ◽  
Location Method ◽  
Cable Network ◽  
Type D ◽  
Transmission Distance ◽  
Distributed Measurement

This template carries out a three-terminal accurate fault location method for distribute cable network. It is improved from type D principle fault location method. Radial distribution network is decomposed into T-type networks. A set of formulas based on three-terminal data can calculate fault distance and find fault branch. Only first transient wave heads is needed. Shorter transmission distance makes it more accurate to extract first wave heads with wavelet. The distributed measurement offers redundant transient voltage data. These data is fully used to improve location success rate and accuracy. The simulation result in ATP-EMTP shows that the location accuracy isnt influenced by wave speed, catadioptric wave, grounding resistance and initial fault phase angle.

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