高电压技术2013，Vol.39Issue(6)：1324-1330,7.DOI:10.3969/j.issn.1003-6520.2013.06.006
基于电晕笼试验的特高压正极直流线路可听噪声频谱特性
Audible Noise Spectrum Characteristics of UHVDC Positive Line Using Corona Cage
摘要
Abstract
In order to measure audible noise of UHVDC transmission lines in outdoors accurately,and to study the relation between corona discharge and the audible noise,using a corona cage in UHVDC Test Base of State Grid Corporation,we experimentally measured and analyzed corona noise and some different typical background noise spectra of DC lines.The difference between spectrum characteristics of positive corona noise and background noise was studied firstly,as well as the difference in spectrum characteristics of positive corona noises aroused by different conduct surface electric fields.Then,stability of relations between A sound level and its spectral components of corona noise was analyzed.A stable corona noise band differing largely from background noises was obtained,and a numerical difference of 11dB between the corona noise' s A sound level and 8 kHz audible noise band component which were measured in the corona cage was obtained.An audible noise test of 4 × 1 000 mm2 conductor in the corona cage confirmed the validity of the proposed method.关键词
特高压/直流/可听噪声/电晕笼/频谱特性/A声级Key words
UHV/ DC/ audible noise/ corona cage/ spectrum characteristic/ A weighting sound level引用本文复制引用
刘元庆,郭剑,陆家榆..基于电晕笼试验的特高压正极直流线路可听噪声频谱特性[J].高电压技术,2013,39(6):1324-1330,7.基金项目
国家重点基础研究发展计划(973计划)(2011CB209402) （973计划）
国家自然科学基金(51107125) （51107125）
Project supported by National Basic Research Program of China(973 Program) (2011CB209402),National Natural Science Foundation of China(51107125). （973 Program）
