雨雪天气下特高压交流单回试验线段电晕损失实测分析  

Analysis on Corona Loss Measurement of Ultra High Voltage AC Single Circuit Test Line in Rain and Snow Weather Conditions

作　　者：律方成[1] 尤少华[1] 刘云鹏[1] 万启发[2] 

机构地区：[1]华北电力大学河北省输变电设备安全防御重点实验室,保定071003 [2]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第9期2089-2095,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB209401);教育部霍英东教育基金基础性研究课题(121058);中央高校基本科研业务费专项资金(09ZG06);高等学校博士学科点专项科研基金(20100036110004)~~

摘　　要：为了研究特高压交流输电线路在雨天、雪天气象条件下的电晕损失特性,基于我国特高压交流试验基地单回试验线段展开实测研究,采用研制的光电数字化输电线路电晕损失监测系统,实现了试验线段电晕损失全天候条件下实时在线测量,根据监测结果分析不同降雨率及大雪气象条件下电晕损失。研究结果表明,正常运行电压下,特高压交流单回试验线段雨天单相单位长度电晕损失约为20～60 W/m,在大雪气象条件下,根据监测结果,特高压交流单回试验线段单位长度电晕损失最大值为:边相达到53.54 W/m,中相达到62.95 W/m,与等值降雨率推算结果较为符合。电晕损失随降雨率增大呈非线性增长,在大雨条件下逐渐趋于饱和,并初步获得8×LGJ-500/35分裂导线降雨率与电晕损失拟合模型。该试验获得的特高压交流单回试验线段电晕损失实测结果,为特高压交流输电线路导线选型设计及运行经济性衡量提供了参考。In order to research corona loss characteristic of ultra high voltage（UHV） AC power transmission line in rain and snow weather conditions,UHV AC test base single circuit test lines were experimentally studied.Optical-electric digital corona loss monitoring system of transmission line was applied to realize the real-time online measurement of UHV AC test line corona loss wholly of the day,and to analyze corona losses under different rain rates and heavy snow atmosphere conditions according to monitoring results.The research results show that single phase corona loss per meter of UHV AC single circuit test line under rain is 20~60 W/m,under heavy rain the monitored maximum results per meter of the test line are 53.54 W/m for the side phase,62.95 W/m for the middle phase,which was fit to the estimate values as adopting equivalent rainfall rate.Corona loss increases nonlinearly as rainfall rate increases,and saturates gradually,thus a abecedarian fitting model between rainfall rate and corona loss of 8×LGJ-500/35 bundle conductors is obtained.Corona loss measurements of UHV AC single circuit test line in the test provide a reference for UHV AC transmission line conductors mode selection,design,and economy characteristic evaluation.

关 键 词：特高压(UHV) 分裂导线 电晕损失 监测 单回试验线段 降雨率 大雪 

分 类 号：TM723[电气工程—电力系统及自动化] TM835