嵌套在人工气候罐中的电晕笼设计  

Design of Corona Cage Placed in Artificial Climate Chamber

作　　者：冯天佑[1] 陈豫朝[2] 张广洲[2] 王晓燕[2] 文远芳[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074 [2]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2010年第12期2930-2936,共7页High Voltage Engineering

基　　金：国家电网公司重大科技项目(SG0861)~~

摘　　要：为了准确模拟高海拔地区特、超高压输电线路由于电晕产生的可听噪声、无线电干扰、电晕损耗等电晕效应,设计出能够放置在人工气候环境试验室中对不同型式导线进行电晕特性试验的电晕笼,基于已知的常规电晕笼设计原则,使用电磁场计算软件ANSYS仿真得到电晕笼内不同型式导线达到指定表面电场强度时所加电压,分析电晕笼不同截面尺寸下、在不同海拔高度的绝缘裕度,以得到电晕笼截面尺寸的合适值,然后根据人工气候环境室的实际可用空间大小来决定电晕笼的长度以及截面尺寸。最终以8分裂导线所得参数为主,设计出能放置在人工气候环境室中电晕笼,其截面边长为6m、长度为19m。将该电晕笼放置在人工气候环境试验室中进行实测,根据所测无线电干扰值,绘出对应不同海拔高度下的无线电激发函数曲线,曲线表明随着海拔高度的升高,导线上产生的无线电干扰值变大。In order to accurately simulate audible noise,radio Interference,corona loss generated by corona in UHV or EHV transmission lines of high altitude area,the corona cage was designed with which the corona characteristics of different types of wires could be tested in an artificial climate environmental test chamber.By current design principles of conventional corona cage,we adopted the electromagnetic field calculation software ANSYS to calculate the voltage of different types of wires in corona cage when the specified surface electric field strength was reached.At different altitudes,the insulation properties of the corona cages with different cross section in size were analyzed to get an appropriate value of section size of corona cage,and the length of the corona cage was determined by the actual available space size of artificial climate chamber.Finally,mainly based on the parameters of eight-split wire,the corona cage was designed which could be placed in the artificial climate chamber,and the corona cage was placed in an artificial climate environment for measurement to display radio interference excitation function curve of test results,indicating that the value of radio interference increased as the altitude increased.

关 键 词：特高压 电晕特性 电晕笼 导线表面场强 高海拔因素 绝缘裕度 

分 类 号：TM851[电气工程—高电压与绝缘技术]