摘要
利用特高压电晕笼开展了13种导线的无线电干扰试验,获得了单位长不同导线的无线电干扰激发函数,分析了导线表面场强、子导线线径、分裂间距和分裂数等因素对导线电晕无线电干扰激发函数的影响规律。结果表明:无线电干扰激发函数与导线表面场强的负倒数呈线性关系;在相同的导线表面场强下,无线电干扰激发函数与子导线线径、分裂数的对数呈线性递增关系,而分裂间距对无线电干扰激发函数影响不大。通过多元回归分析方法对试验数据进行统计分析,回归方程和相关系数的显著性分析结果表明回归方程高度显著,且逼近效果好,回归方程各系数也是高度显著的,可对无线电干扰激发函数进行有效的预测,通过无线电干扰激发函数法可转化为实际特高压输电线路无线电干扰水平,为我国特高压输电线路导线选型设计提供参考。
Corona effect of 13 bundles was tested in the UHV corona cage,and the radio interference excitation function of each bundle was obtained.Furthermore,effects of surface gradient of conductor,diameter of sub-conductor,split space and split number on the radio interference excitation function were studied in detail.The results show that radio interference excitation function is in linear relation with negative reciprocal of gradient.In the same surface gradient case,radio interference excitation function is in linear increasing relation with diameter of sub-conductor and logarithm of split number.However,the influence of split space can be neglected.For analyzing the test data,multi-variant regression method is introduced.The obtained regression equation and its coefficients are verified to be highly significant by test of significance.Finally,methods for predicting radio interference generated from UHV lines are proposed,which are suitable for actual situation of China.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第12期2942-2947,共6页
High Voltage Engineering
基金
中国电力工程顾问集团公司科技项目(DG1-T01-2010)~~
关键词
特高压
交流输电线路
电晕效应
电晕笼
无线电干扰
激发函数
ultra high voltage（UHV）
AC transmission lines
corona effect
corona cage
radio interference
excitation function
