植被尺寸对导线触树高阻接地故障特性的影响研究
Analysis of the influence of vegetation size on the characteristics of high resistance ground of wire touching tree
文嘉果 1王棣生 1王军 1宁鑫2
作者信息
- 1. 西华大学 电气与电子信息学院,四川 成都 610039
- 2. 国网四川省电力公司电力科学研究院,四川 成都 610041
- 折叠
摘要
针对植被尺寸对导线触树高阻接地故障(THIF)特性影响规律不明确、引燃难以预测的问题,本文深入分析了THIF故障过程中引燃现象及泄漏电流的变化规律.探讨了不同植被尺寸与泄漏电流之间的关系,并研究了植被尺寸对树线接触位置电弧放电特性的影响.在此基础上,推导了植被尺寸参数与泄漏电流之间的数值关系,并建立了综合考虑植被直径和长度的明火时刻泄漏电流预测模型.研究成果可为配电线路走廊植被管理及山火防治提供重要依据.
Abstract
In response to the unclear impact of vegetation size on the characteristics of high impedance ground fault(THIF)caused by wire tree contact and the difficulty in predicting ignition,this article deeply analyzes the ignition phenomenon and the variation of leakage current during the THIF fault process.Explored the re-lationship between different vegetation sizes and leakage current,and studied the influence of vegetation size on arc discharge char-acteristics at tree line contact positions.On this basis,the numeri-cal relationship between vegetation size parameters and leakage current was derived,and a leakage current prediction model at open flame time was established that comprehensively considers vegetation diameter and length.The research results can provide important basis for vegetation management and mountain fire pre-vention in distribution line corridors.
关键词
导线触树/高阻接地故障/泄漏电流/植被尺寸/预测模型Key words
wire contact tree/high resistance ground fault/leak-age current/vegetation size/prediction model引用本文复制引用
基金项目
国家电网科技项目(52199921002U)
出版年
2024
NETL
NSTL
维普
万方数据