特高压交流输电线路电磁场分布特性与纯声衰减规律研究  

Research on Distribution Characteristics of Electromagnetic Field and Attenuation Law of Pure Sound for UHV AC Transmission Line

作　　者：罗超[1] 方书博[2] 查智明[1] 韩晴[2] 姚为方[1] 华雪莹[1] 徐鹏[1] 张晓琴[2] LUO Chao FANG Shubo ZHA Zhimingl HAN Qing YAO Weifang HUA Xueying XU Peng ZHANG Xiaoqin(Anhui Electric Power Company Electric Power Research Company of State Grid Electric Power Institute, Hefei 230601, China Wuhan NARI Limited Liability Research Institute, Wuhan 430074, China)

机构地区：[1]国网安徽省电力公司电力科学研究院,合肥230601 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074

出　　处：《高压电器》2017年第8期94-99,共6页High Voltage Apparatus

摘　　要：特高压交流输电线路低频噪声对走廊沿线居民生活影响不容忽视,尤其是交流纯声沿线路横向衰减慢且传播距离远,对临近居民生活影响往往更为严重。为了研究纯声的分布规律及影响程度,文中按照电磁环境参数测量方法分别测量了特高压交流同塔双回输电线路直线塔和耐张塔下方50、100、200 Hz的3种纯声频率噪声及直线塔电磁场分布值,获得了相应噪声的频谱直方图、瀑布图和电磁场随距离变化曲线,分析了各频率噪声随距离的变化规律,结果表明:不同频率低频噪声随远离线路中心的衰减规律不同,50 Hz频率噪声从线路中心至边相导线外20 m处的最大噪声分别为42.4 d B和49.3 d B,在工业企业厂界噪声排放标准昼间规定的限值内。通过对线路下方一定高度伞面处嗞嗞噪声现象分析和电场强度测量,证明电场易受畸变而产生可听噪声且4 kV/m是人或其他物体从线路下方经过时开始出现噪声的电场强度。The influence of low-frequency noise on health of the residents along UHV AC transmission line corridor cannot be ignored. Especially,the influence of AC pure sound is worse due to its longer propagation distance and slower attenuation.In order to understand the distribution law and influence of AC pure sound, this study measured three kinds of pure acoustic frequency noise of respective 50,100,and 200 Hz under the straight-line tower and strain tower of UHV AC double-circuit transmission line on the same tower,and obtained the corresponding spectrum histogram,waterfall chart ,and electromagnetic field versus distance curve.The change law of different frequency noise with the distance was analyzed.The results showed that the noise with different low frequency exhibited discrepant attenuation according to the distance from the line center,and the maximum 50 Hz noises were 42.4 dB and 49.3 dB at line center and the position 20 meters away from the side-phase conductor, respectively, which were both within the limit of noise emission standard in the daytime for industrial enterprises. Analysis on DTH sound and measurement of electric field at certain height of umbrella surface prove that the electric field is susceptible to distortion to produce audible noise,and the 4 kWm is the very electric field intensity starting to produce noise when human or other objects move under the transmission line.

关 键 词：交流纯声 特高压同塔双回线路 频谱直方图 噪声排放标准 

分 类 号：TM75[电气工程—电力系统及自动化]