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2000
Volume 18, Issue 8
  • ISSN: 2352-0965
  • E-ISSN: 2352-0973
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Abstract

Background

Tree-contact single-phase-to-ground fault (TSF) is a kind of common fault in the distribution grid. Since the initial electrical signal of TSF is weak, it is difficult to detect and remove it in time. Finally, it may evolve into more severe faults such as arc fault.

Objective

Therefore, establishing a numerical model capable of depicting the trend of TSF transition resistance can contribute to clarifying the development of TSF and provide a reference for early fault detection. The moisture content of branches is one of the important factors affecting TSF development, yet the mechanism of moisture content affecting the fault development is still ambiguous.

Methods

In order to explore the fault development process of branches with various moisture content, a TSF experimental platform of a 10kV distribution network line is built to evolve a characteristic curve of transition resistance influenced by moisture content and the temperature change curve during the development of TSF. Based on the experimental data, a numerical model of TSF transition resistance considering moisture content of trees is established. According to the trend of experimental data, a segmented model with the first peak of leakage current as the dividing point is established.

Results

The segmented model takes the change of tree resistivity with temperature as the core, reduces the dependence on the traditional empirical parameters, and improves the fitting degree with different tree branch parameters. The improved model has a higher matching degree with the experimental measurement data.

Conclusion

The comparison between simulation results and experimental data shows that the improved model can efficiently predict the development process of TSF transition resistance under various tree parameters.

© 2025 The Author(s). Published by Bentham Science Publishers.
This is an open access article published under CC BY 4.0 https://creativecommons.org/licenses/by/4.0/legalcode
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2024-07-15
2025-11-15

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Numerical Simulation of Transition Resistance for TSF: Influence of Moisture Content
Recent Advances in Electrical & Electronic Engineering 18, 1286 (2025); https://doi.org/10.2174/0123520965304622240703052236
/content/journals/raeeng/10.2174/0123520965304622240703052236
/content/journals/raeeng/10.2174/0123520965304622240703052236
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  • Article Type:     Research Article
Keyword(s): changing rate of resistance; contact resistance; high impedance fault; moisture content; transition resistance; Tree-contact single-phase-to-ground fault

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