特高压直流导线在单双极电晕笼中的可听噪声测量与分析  

Measurements and Analysis on UHVDC Conductor's Audible Noise in Unipolar and Bipolar Corona Cages

作　　者：刘元庆[1] 郭剑[1] 陆家榆[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2012年第5期1-5,共5页Power System Technology

基　　金：国家重点基础研究发展计划项目(973项目)(2011CB209402);国家自然科学基金项目(51107125)~~

摘　　要：利用国家电网公司特高压直流试验基地直流电晕笼,对特高压直流导线在正极、负极、正负双极电晕笼中的可听噪声测量方法进行了研究。对单双极电晕笼内直流导线的表面电场进行了有限元仿真计算。计算结果表明,若施加相同等级的电压,单双极电晕笼中直流导线表面的平均最大标称电场相对差值在0.4%之内,采用单、双极电晕笼试验对导线表面场强的影响可以忽略不计。对单双极电晕笼中的特高压直流正极、负极、正负双极导线的可听噪声进行了全电压测量与分析。结果表明,对于我国现有的直流线路来说,利用正单极电晕笼代替正负双极电晕笼进行可听噪声试验是可行的。The measurement approach of audible noises of UHVDC conductor inside positive-, negative- and bi-polar corona cages located in UHVDC power transmission test base of State Grid Corporation of China is researched. The simulation and finite element calculation of surface electric fields of UHVDC conductor inside mono- and bi-polar corona cages are performed. Calculation results show that if the voltage of the same voltage class is applied, the relative difference values of average maximum nominal electric field of UHVDC conductor surface inside mono- and bi-polar corona cages are less than 0.4%, and the influences of surface electric field strength on audible noise can be neglected. The full voltage measurement and analysis on audible noises of UHVDC positive-, negative- and bi-polar conductors inside mono- and bi-polar corona cages are performed. Results of measurement and analysis show that as for existing UHVDC transmission lines in China it is feasible to carry out audible noise test by positive mono-polar corona cage instead of bi-polar corona cage.

关 键 词：电晕笼 特高压直流线路 可听噪声 正极 双极 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]