典型高风险植被火条件下导线——板间隙击穿特性  

Breakdown Characteristics of Conductor-plane Gap Under Typical High Risk Vegetation Fire Condition

作　　者：周恩泽 饶章权 刘琦 黄勇 向谆 王华清 黄道春[2] ZHOU Enze;RAO Zhangquan;LIU Qi;HUANG Yong;XIANG Zhun;WANG Huaqing;HUANG Daochun(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广州510080 [2]武汉大学电气与自动化学院,武汉430072

出　　处：《高压电器》2024年第3期179-185,共7页High Voltage Apparatus

基　　金：南方电网科技项目(GDKJXM20198386);国家自然科学基金资助项目(51677138)。

摘　　要：为准确评估山火条件下架空输电线路的跳闸风险,提升电网安全运行水平,文中对南方电网典型高风险植被火条件下导线—板间隙击穿特性进行了研究。搭建模拟植被火燃烧特征试验平台和模拟山火间隙击穿试验平台,研究了云南松、水杉、速生桉、灌木和茅草5种植被的火焰燃烧特征参数和间隙击穿特性,对不同植被的火焰温度、火焰高度、灰分含量和可燃物热值与导线—板间隙击穿特性的关系进行研究。研究结果表明上述因素与间隙平均击穿电压梯度近似呈线性关系,并拟合得到其多元线性回归公式。使用熵权法得到火焰温度在植被燃烧特征中所占权重最高,上述5种植被中云南松的山火跳闸风险最高。文章研究结果可为架空输电线路山火跳闸风险评估提供参考。For predicting accurately the trip risk of overhead transmission lines under the condition of mountain fire and improve safe operation level of power grid,the breakdown voltage characteristics of conductor-plane gap under the condition of typical high-risk vegetation fire of Southern Power Grid are studied.The fire combustion characteris-tics simulation test platform and mountain fire gap breakdown simulation test platform are set up for the study of flame combustion characteristics and gap breakdown characteristic of such five vegetations as the pinus yunnanen-sis,metasequoia,eucalyptus,shrubs,and thatch,and the replationship between the flame temperature of different vegetation,flame height,ash content,and fuel heating value and breakdown characteristic of conductor-plane gap is studied.The study results show that the relationship between the above factors and the average gap breakdown volt-age gradient is approximately linear and its multiple linear regression formula is obtained by curve fitting.It is found by using the entropy-weight method that flame temperature has the highest weight in vegetation combustion characteristics,and pinus yunnanensis has the highest risk of fire trip among the five vegetations.The study results can provide a reference for predicting risk assessment of mountain fire trips of overhead transmission lines.

关 键 词：架空线路 跳闸风险 山火 植被种类 间隙击穿特性 

分 类 号：TM75[电气工程—电力系统及自动化]