The transmission line corridor will inevitably cross the icing area in China. Long-term researches have been carried out on corona characteristics of the conductor. However

studies on effect of icing on transmission line corona inception characteristics are seldom researched at present. This paper presents a platform that can be used to do some researches about that issue. The test is done in the corona cage

in which a smooth stainless steel tube is applied to simulate the single conductor. In order to research the influence of different icing degree to the corona inception characteristics of the conductor

conductor icing test was done with configuring three different conductivity of icing water. The test result shows that the conductivity of icing water has little impact on corona inception voltage of conductor in certain range. Owing to the ice

the distortion of the conductor electric field is serious. With the increase of icicle length

conductor corona current increases significantly

correspondingly

conductor corona inception voltage and equivalent roughness coefficient decrease. When icicle length increases to about 18 mm

the corona inception voltage and equivalent roughness coefficient remain almost unchanged.