高海拔特高压直流线路可听噪声频域特性研究  

Study on Frequency Domain Characteristics of Audible Noisein UHVDC Line at High Altitude

作　　者：郎族吉 郝建红[1] 赵录兴 LANG Zuji;HAO Jianhong;ZHAO Luxing(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China)

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

出　　处：《湖北电力》2019年第5期1-6,共6页Hubei Electric Power

基　　金：国家自然科学基金项目(项目编号:51607162);国家电网公司科技项目(项目编号:GY71-18-056)。

摘　　要：为研究高海拔环境下特高压直流线路电晕放电产生的可听噪声的特性,基于国家电网有限公司西藏羊八井特高压直流实验基地的试验线段,对直流线路的可听噪声进行了测量,开展了可听噪声频域特性的研究,得到了正、负极侧可听噪声1/3倍频程谱,比较并分析了双极性导线正、负极侧的频谱差异和A声级的差异;比较了高海拔环境的直流线路可听噪声与按传统BPA经验公式计算的理论值的差异,分析了造成差异的原因,得出考虑高海拔因素的可听噪声修正值,改良了BPA经验公式。研究结果为高海拔特高压直流线路可听噪声的进一步预测和分析提供了有力支撑。In order to study the characteristics of audible noise generated by corona discharge in UHVDC lines at high altitudes,and based on the test line section of Tibet Yangbajing UHVDC Experimental Base of the State Grid Corporation Limited of China,this paper measures the audible noise of the DC line,and makes a study on the frequency domain characteristics of audible noise,obtaining the 1/3 octave spectrum of audible noise on both the positive and negative side,and comparing and analyzing the difference in the frequency spectrum of the positive and negative side of the bipolar wire and the difference in Sound Level A. And then,the paper makes comparisons on the difference between the audible noise of DC lines in high altitude environment and the theoretical value calculated by use of the traditional BPA empirical formula. The paper also analyzes the reason of the difference,obtaining the correction value of audible noise considering the factor of high altitude,and improving BPA empirical formula. The results provide a strong support for the further prediction and analysis of audible noise of UHVDC lines at high altitude.

关 键 词：高海拔 特高压直流 可听噪声 频谱 A声级 电晕放电 

分 类 号：TM835[电气工程—高电压与绝缘技术]