Typical Fault Cause Recognition of Single-Phase-to-Ground Fault for Overhead Lines in Nonsolidly Earthed Distribution Networks

2020 ◽  
Vol 56 (6) ◽  
pp. 6298-6306
Author(s):  
Yong-Liang Liang ◽  
Ke-Jun Li ◽  
Zhao Ma ◽  
Wei-Jen Lee
Keyword(s):  
Single Phase ◽  
Distribution Networks ◽  
Overhead Lines ◽  
Ground Fault

scholarly journals Model and Experimental Detection of Single Phase-to-Ground Fault for Overhead Wires in Distribution Networks by Location Method

2020 ◽  
Vol 216 ◽  
pp. 01043
Author(s):  
Minullin Renat ◽  
Piskovatsky Yuri ◽  
Kasimov Vasil
Keyword(s):  
Transmission Line ◽  
Simulation Model ◽  
Single Phase ◽  
Signal Propagation ◽  
Distribution Networks ◽  
Field Conditions ◽  
Location Method ◽  
Overhead Lines ◽  
Overhead Transmission Line ◽  
Ground Fault

The simulation model of the overhead transmission line channel implemented in PSCAD software allowing researches of location signal propagation via overhead lines of the distribution networks 6–35 kV under conditions of single phase-to-ground fault is considered. The model reflectograms are compared with their appropriate experimental reflectograms registered under the laboratory and field conditions for the overhead lines during simulation of various types of the single phase-to-ground faults.

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.

scholarly journals Non-Directional Earth Fault Passage Indication in Isolated Neutral Distribution Networks

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4732
Author(s):  
Amir Farughian ◽  
Lauri Kumpulainen ◽  
Kimmo Kauhaniemi
Keyword(s):  
Single Phase ◽  
Distribution Networks ◽  
Voltage Measurement ◽  
Negative Sequence ◽  
Overhead Lines ◽  
New Methods ◽  
Zero Sequence ◽  
Isolated Neutral ◽  
Negative Sequence Current ◽  
Symmetrical Sequence

In this paper, two new methods for locating single-phase to ground faults in isolated neutral distribution networks are proposed. The methods are based on the analysis of symmetrical sequence currents. They are solely based on currents, not requiring voltage measurement. The first method employs only the zero sequence current and the second one utilizes the negative sequence current in combination with the zero sequence current. It is revealed why using only zero sequence current with a simple threshold is insufficient and may lead to false results. Using the proposed methods, earth faults with high resistances can be located in isolated neutral distribution networks with overhead lines or cables.

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.

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