Composite fault location method of single-phase-to-earth about rural distribution networks

2009 ◽  
Author(s):  
Feng Yan ◽  
Zengwei Guo
Keyword(s):  
Fault Location ◽  
Single Phase ◽  
Distribution Networks ◽  
Location Method

A New Fault Location Method for 10 KV Distribution Lines with Branches

2014 ◽  
Vol 986-987 ◽  
pp. 1437-1442
Author(s):  
Feng Yan ◽  
Shuang Shuang Li
Keyword(s):  
Pattern Recognition ◽  
Traveling Wave ◽  
Fault Location ◽  
Single Phase ◽  
Distribution Networks ◽  
Support Vector ◽  
Location Method ◽  
Vector Machines ◽  
Recognition Function ◽  
Simulation Results

By using the advantages of C-type of traveling wave fault location method in distance measuring and the pattern recognition function of support vector machines (SVM),a new fault location method is presented.The first step of the method is determining the fault distance by C-type of traveling wave location method; the second one is locating the fault section by SVM. It also adopts the wavelet to reduce the noise of fault signal,and the accuracy can be more precise when the parameters of SVM are optimized.The simulation results of ATP and MATLAB show that the method can determine the single phase grounding fault point in 10kv distribution networks with branches accurately.

Research on Single-Phase Grounding Fault in Distribution Networks with a DC Power Positioning Method

2014 ◽  
Vol 530-531 ◽  
pp. 353-356
Author(s):  
Run Sheng Li
Keyword(s):  
Power Distribution ◽  
Single Phase ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Distribution Network ◽  
Power Outage ◽  
Location Method ◽  
Fault Resistance ◽  
Ground Fault ◽  
Positioning Method

Due to the high ground fault resistance and the complexity of power distribution network structure (such as too many nodes, branches and too long lines), adopting common traveling wave method and ac injection method can not effectively locate the single-phase grounding fault in the distribution network system.To solve above problems and determine the position of the point of failure prisely, this paper adopted the dc location method of injecting the dc signal from the point of failure under the power outage offline. This paper introduces the single phase dc method and the method of three phase dc, and the simulation shows that the dc location method is effective and feasible.

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.

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