Influence of harmonic voltages on single line to ground faults in distribution networks with isolated neutral or resonant earthing

2005 ◽  
Author(s):  
S. Sorensen ◽  
H. Nielsen ◽  
H.J. Jorgensen
Keyword(s):  
Distribution Networks ◽  
Single Line ◽  
Ground Faults ◽  
Isolated Neutral

scholarly journals Location of Single Phase to Ground Faults in Distribution Networks Based on Synchronous Transients Energy Analysis

2020 ◽  
Vol 11 (1) ◽  
pp. 774-785 ◽  
Author(s):  
Xuewen Wang ◽  
Hengxu Zhang ◽  
Fang Shi ◽  
Qiuwei Wu ◽  
Vladimir Terzija ◽  
...  
Keyword(s):  
Single Phase ◽  
Energy Analysis ◽  
Distribution Networks ◽  
Ground Faults

scholarly journals APPLICATION OF GSM TECHNOLOGY FOR IDENTIFICATION OF PHASE-TO-GROUND FAULTS IN ELECTRIC NETWORKS WITH ISOLATED NEUTRAL AND PIN-TYPE ISOLATION

2018 ◽  
Vol 2018 (5) ◽  
pp. 96-99
Author(s):  
V.M. Bezruchko ◽  
◽  
R.O. Buinyi ◽  
A.Y. Strogii ◽  
V.I. Tkach ◽  
...  
Keyword(s):  
Electric Networks ◽  
Ground Faults ◽  
Isolated Neutral

scholarly journals A Novel Protection Method for Single Line-to-Ground Faults in Ungrounded Low-Inertia Microgrids

Energies ◽  
2016 ◽  
Vol 9 (6) ◽  
pp. 459 ◽  
Author(s):  
Liuming Jing ◽  
Dae-Hee Son ◽  
Sang-Hee Kang ◽  
Soon-Ryul Nam
Keyword(s):  
Single Line ◽  
Protection Method ◽  
Ground Faults

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.

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