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2024年6期
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Comprehensive study on tree-contact single-phase-to-ground faults:Modelling,risk analysis,and detection recommendations
Comprehensive study on tree-contact single-phase-to-ground faults:Modelling,risk analysis,and detection recommendations
摘要
Tree-contact single-phase-to-ground faults(TSFs)present a significant fire hazard in electrical distribution systems,and research on the development,modelling,and moni-toring is insufficient.This article investigates the electro-thermal coupling mechanisms during the current rise of TSFs,constructing a simplified power-frequency model that leverages actual physical parameters like tree size for prolonged simulations of the first TSF stage zero-sequence current.Validated through full-scale testing,the model enables digital simulations across various tree sizes,concluding that the detection sensitivity for grounding faults should not exceed 0.5 A to mitigate fire risks effectively.This approach surpasses the limitations of traditional high-impedance fault models reliant on empirical parameters and the shortcomings of generalised conclusions from experimental in-ductions,offering a new paradigm for TSF research that enhances the predictive accuracy and applicability of fault analysis in electrical distribution networks.
Author：
Dong Liang
Bingyin Xu
Pengwei Wang
Wei Wang
作者单位：
School of Electrical & Electronic Engineering,Shandong University of Technology,Zibo,China
年，卷(期)：
2024, 9(6)
机标分类号：
TP393.08
S
TP273
在线出版日期：
2025年6月25日
