淋雨后高压直流导线电晕产生的可听噪声特性  

The Characteristics of Audible Noise Produced by Corona of HVDC Conductors after Raining

作　　者：刘元庆 杨晓洪 姜脉哲 史丽鹏 李振杰 Liu Yuanqing;Yang Xiaohong;Jiang Maizhe;Shi Lipeng;Li Zhenjie(China Electric Power Research Institute,Beijing 100192 China;School of Electrical and Electronic Engineering North China Electric Power University,Beijing 102206 China)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《电工技术学报》2020年第S02期371-376,共6页Transactions of China Electrotechnical Society

基　　金：国家电网有限公司总部科技资助项目(超/特高压直流线路全系列导线起晕电场强度试验及预测研究)。

摘　　要：可听噪声是高压直流线路设计中必须考虑的一个重要因素,但目前导线在淋雨后的可听噪声特性缺乏深入研究。该文依托户外电晕笼试验平台,针对淋雨后高压直流分裂导线在电晕放电情况下对其产生的可听噪声随时间的变化特性进行研究。试验结果表明,导线淋雨后,随着时间的推移,导线产生的可听噪声逐渐增大;导线的电晕放电越强烈,由电晕产生的可听噪声稳定下来所需的时间越短;在高电场强度下的电晕放电稳定后再将电压降低至较弱电晕放电时,电晕放电产生的可听噪声依然很稳定。该文的研究结果对超/特高压直流输电线路的可听噪声测量和环保评价有重要意义。Audible noise is an important factor to be considered in the design of HVDC transmission lines.However,the characteristics of audible noise of conductors after rain are still lacking in-depth study.Based on the outdoor corona cage test platform,characteristics of audible noise generated by HVDC split conductor under corona discharge after raining are studied in this paper.Test results show that the audible noise generated by conductors increases gradually with time after raining.The stronger the corona discharge of the conductor,the shorter the time required for the audible noise produced by the corona to stabilize.When the corona discharge is stable at high field strength and then the voltage is reduced to weak corona discharge,the audible noise produced by corona discharge is still stable.Results of this paper are of great significance to the measurement of audible noise and environmental protection evaluation of UHVDC transmission lines.

关 键 词：高压直流导线 可听噪声 淋雨 湿导线 表面电场强度 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]