高海拔地区大截面导线束的无线电干扰特征研究  

Study on the radio interference of large section conductor bundles at high altitude

作　　者：万保权[1] 冯华 何旺龄 丰佳 李有春 WAN Baoquan;FENG Hua;HE Wangling;FENG Jia;LI Youchun(State Key Laboratory of Power Grid Environmental Protection,China Electric Power Research Institute,Wuhan Hubei 430074;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou Zhejiang 310007;School of Electrical and Electronic Engineering,North China Electric Power University,Baoding Hebei 071003;State Grid Jinhua Power Supply Company,Jinhua Zhejiang 321000)

机构地区：[1]中国电力科学研究院电网环境保护国家重点实验室,湖北武汉430074 [2]国网浙江省电力有限公司,浙江杭州310007 [3]华北电力大学电气与电子工程学院,河北保定071003 [4]国网金华供电公司,浙江金华321000

出　　处：《环境污染与防治》2021年第8期933-936,979,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51907065);国网浙江省电力有限公司科技项目(No.5211JH2000RU)。

摘　　要：利用青海高海拔特高压交流电晕笼(8 m×8 m×35 m,海拔2261 m),对3种大截面导线束(型号分别为8×LGJ720、8×LGJ900、10×LGJ720)在干燥和不同降雨量条件下的导线电晕放电干扰无线电的特征进行了试验研究。分析了表面场强及降雨量对线路无线电干扰的影响规律。对于8×LGJ720导线,表面场强在10、12 kV/cm时,无线电干扰水平随着降雨量的增大呈现出近似线性增大的趋势。对于8×LGJ900、10×LGJ720导线,当降雨量>2.0 mm/h,表面场强≥12 kV/cm时,降雨量对于无线电干扰的影响很小。尽管导线在干燥和降雨条件下无线电干扰值较为接近,但是表面电晕放电的形态存在不同。研究成果可以为高海拔地区交流输电线路的选型提供参考。Qinghai high altitude ultra-high-voltage corona cage(8 m×8 m×35 m,altitude 2261 m)was employed to test the radio interference(RI)characterastics of three large section conductor bundles(8×LGJ720,8×LGJ900 and 10×LGJ720)caused by corona cage under fair weather condition and different rainy conditions.Then the influence of the electric field and rain rate on RI characteristics was analyzed.It was found that,for 8×LGJ720,RI levels displayed an approximate linear increase with the increasing of rain rate in electric field strength of 10 and 12 kV/cm.For 8×LGJ900 and 10×LGJ720,when the rain rate was more than 2.0 mm/h and the electric field strength was more than 12 kV/cm,the fluctuation of RI level was very small.Although the RI levels for bundles in dry and rainy conditions were similar,but the corona discharge states were different.The results concluded in this paper could provide reference data for high-altitude power lines selection.

关 键 词：输电线路 高海拔 大截面导线束 电磁污染 无线电干扰 

分 类 号：TM75[电气工程—电力系统及自动化]