scholarly journals Method of Locating Ground Fault in Low Resistance Grounding Distribution Network by Grounding Wire Current

2021 ◽  
Vol 2066 (1) ◽  
pp. 012100
Author(s):  
Bo Yang ◽  
Yuanchun Fan ◽  
Chen Yang ◽  
Jun Xu ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Current Distribution ◽  
Fault Location ◽  
Distribution Networks ◽  
Distribution Law ◽  
Ground Fault ◽  
The Earth ◽  
Ground Current ◽  
Small Resistance ◽  
Urban Distribution ◽  
Earth Electrode

Abstract Three-core cables are increasingly used in urban distribution networks. The shielding layer, armor layer of the three-core cable and the earthing electrode constitute the earth-electrode network. When a ground fault occurs, a regular ground wire current distribution is formed in the network. This paper analyzes the distribution law of ground current, and according to the distribution law, puts forward a kind of grounding fault location method of neutral point small resistance grounding grid, and finally designs and implements the grounding fault location system.

scholarly journals Reflected Traveling Wave Based Single-Ended Fault Location in Distribution Networks

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3917 ◽  
Author(s):  
Yangang Shi ◽  
Tao Zheng ◽  
Chang Yang
Keyword(s):  
Traveling Wave ◽  
Power Distribution ◽  
Fault Location ◽  
Single Phase ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Distribution Networks ◽  
Reflected Waves ◽  
Ground Fault ◽  
Location Methods

Traveling wave (TW)-based fault-location methods have been used to determine single-phase-to-ground fault distance in power-distribution networks. The previous approaches detected the arrival time of the initial traveling wave via single ended or multi-terminal measurements. Regarding the multi-branch effect, this paper utilized the reflected waves to obtain multiple arriving times through single ended measurement. Potential fault sections were estimated by searching for the possible traveling wave propagation paths in accordance with the structure of the distribution network. This approach used the entire propagation of a traveling wave measured at a single end without any prerequisite of synchronization, which is a must in multi-terminal measurements. The uniqueness of the fault section was guaranteed by several independent single-ended measurements. Traveling waves obtained in a real 10 kV distribution network were used to determine the fault section, and the results demonstrate the significant effectiveness of the proposed method.

A Novel of Fault Localization Method to Determine Fault Distance for Single Line to Ground Fault in the Distribution Network

2015 ◽  
Vol 785 ◽  
pp. 353-357
Author(s):  
L.J. Awalin ◽  
Hazlie Mokhlis ◽  
A.H.A. Bakar ◽  
Hazlee Azil Illias
Keyword(s):  
Input Data ◽  
Large Scale ◽  
Fault Location ◽  
Distribution Network ◽  
Distribution Networks ◽  
Voltage Sag ◽  
Test Results ◽  
Localization Method ◽  
Ground Fault ◽  
Location Algorithm

In this paper, a novel fault location algorithm in distribution networks based on combination of impedance based method is presented. The voltage sag and current swell from the measurement node are used as input data to estimate the fault distance. To improve the accuracy of the proposed method, the voltage sag and current swell in the un-faulted phase also considered. Test results using a large scale distribution network from Malaysia confirms the accuracy of the proposed method. A comparison is made with the existing method which shows that the proposed method gives more accurate fault distance.

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.

scholarly journals Traveling-Wave Based Fault Location for Phase-to-Ground Fault in Non-Effectively Earthed Distribution Networks

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5028
Author(s):  
Yani Wang ◽  
Tao Zheng ◽  
Chang Yang ◽  
Li Yu
Keyword(s):  
Traveling Waves ◽  
Traveling Wave ◽  
Wavelet Decomposition ◽  
Distribution Systems ◽  
Fault Location ◽  
Distribution Networks ◽  
Frequency Component ◽  
Time Frequency ◽  
Ground Fault ◽  
Measurement Units

This paper presents a multi-terminal traveling-wave-based fault location method for phase-to-ground fault in non-effectively earthed distribution systems. To improve the accuracy of fault location, a two-terminal approach is used to identify the faulty branch and a single-ended approach is followed to determine the fault distance based on the arrival time of reflected traveling waves. Wavelet decomposition is employed to extract the time-frequency component of the aerial-mode traveling waves. Magnitude and polarity of the wavelet coefficients are used to estimate the fault distance starting from the propagation fault point to the branch terminal. In addition, the network is divided into several sub-networks in order to reduce the number of measurement units. The effectiveness of this approach is demonstrated by simulations considering the phase-to-ground fault that happens at different positions in the distribution network.

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