正极性导线电晕声音和无线电干扰变化都不大；负极性导线电晕声音和无线电干扰都增大。
The corona voice strengths and levels of radio interference produced by positive polarity wire have little changes, and those produced by negative polarity wire increase with temperature.
因此研究高海拔地区输电线路导线电晕特性、放电机理及其影响因素具有重要的学术意义和工程应用价值。
This paper elaborates theoretically the corona current characteristics of insulator strings under high voltage application and verifies them by experiment.
电晕笼是一种可对导线电晕特性进行试验研究的设备，采用电晕笼进行导线电晕特性试验可弥补试验线段的不足。
Corona cage is one of indispensable equipments for conductor corona performance researches. Tests of conductor corona characteristics in corona cages can cover the shortages of those with test lines.
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