Research on Earth Fault Location for Distribution Network Based on Zero Sequence Current Ratio

2013 ◽  
Vol 7 (6) ◽  
pp. 1292-1298
Author(s):  
YAN Suyun ◽  
WANG Yi
Keyword(s):  
Fault Location ◽  
Distribution Network ◽  
Current Ratio ◽  
Earth Fault ◽  
Zero Sequence

scholarly journals Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1293 ◽  
Author(s):  
Krzysztof Lowczowski ◽  
Jozef Lorenc ◽  
Jozef Zawodniak ◽  
Grzegorz Dombek
Keyword(s):  
Fault Location ◽  
Overhead Lines ◽  
Earth Fault ◽  
Ground Fault ◽  
Detection And Identification ◽  
Zero Sequence ◽  
Network Experiment ◽  
System Configurations ◽  
Zero Sequence Voltage ◽  
Core Current

The paper analyzes the utilization of cable screen currents for earth fault identification and location. Attention is paid on cable and mixed feeders—cable and overhead lines. The principle of operation is based on utilization of 3 criterion values: Ratio of cable screen earthing current and zero sequence cable core current—RF110/15, phase shift between cable screen earthing current and zero sequence cable core current—α and cable screen admittance defined as a ratio of cable screen earthing current and zero sequence voltage—Y0cs. Earth fault location is possible thanks to discovered relation between RF110/15 and α, whereas Y0cs allows for reliable detection of earth faults. Detection and identification are very important because it allows to increase the reliability of supply—reduce downtime and number of consumers affected by the fault. The article presents a phase to ground fault current flow for different power system configurations. At the end solution, which improves location capabilities is proposed. The solution is analyzed in PSCAD software and verified by network experiment.

Study of Earth-Fault Location Method for Distribution Network Based on Transient Signal

2011 ◽  
Vol 105-107 ◽  
pp. 742-746
Author(s):  
Zhi Chao Huang ◽  
Yi Zhong ◽  
Cai Lin Li ◽  
Mu Liu ◽  
Sheng Zhen Yang
Keyword(s):  
Frequency Band ◽  
Fault Location ◽  
Characteristic Impedance ◽  
Distribution Network ◽  
Transient Current ◽  
Transient Signal ◽  
Location Method ◽  
Earth Fault ◽  
Current Energy ◽  
Feature Frequency

According to the generating process and propagation characteristics of earth-fault transient signal, an earth-fault location method for distribution network based on transient signal is presented. In the method, in order to change line characteristic impedance, a resonant filter circuit is paralleled in line segment border, so that it could cause transient current energy differences in feature frequency band on both sides of detection device. The location method achieves earth-fault area location through comparing transient current energy and energy attenuation coefficient in feature frequency band. The simulation test result shows that the method isn't influenced by distribution system grounded style, operation style and other factors and which could detect the earth-fault area rapidly and reliably in distribution network and has a high project application value.

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.

scholarly journals Evaluation of earth fault location algorithm in medium voltage distribution network with correction technique

2019 ◽  
Vol 9 (3) ◽  
pp. 1987
Author(s):  
N. S. B. Jamili ◽  
M. R. Adzman ◽  
S. R. A. Rahim ◽  
S. M. Zali ◽  
M. Isa ◽  
...  
Keyword(s):  
Fault Location ◽  
Distribution Network ◽  
Distance Estimation ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Earth Fault ◽  
Ground Fault ◽  
The Earth ◽  
Correction Technique ◽  
Location Algorithm

This paper focused on studying an algorithm of earth fault location in the medium voltage distribution network. In power system network, most of the earth fault occurs is a single line to ground fault. A medium voltage distribution network with resistance earthing at the main substation and an earth fault attached along the distribution network is modeled in ATP Draw. The generated earth fault is simulated, and the voltage and current signal produced is recorded. The earth fault location algorithm is simulated and tested in MATLAB. The accuracy of the earth fault location algorithm is tested at several locations and fault resistances. A possible correction technique is explained to minimize the error. The results show an improvement fault location distance estimation with minimum error.

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