Influence of positive DC electric field on rime icing on the insulator and its experimental verification in the natural environment  

作　　者：Zongyuan Liu Yuyao Hu Xingliang Jiang Lei Chen Mingchen Chi Feiyan Han Chong Zhao 

机构地区：[1]College of Electrical and Electronic Engineering,Shandong University of Technology,Zibo,China [2]State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing,China

出　　处：《High Voltage》2023年第5期954-966,共13页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:51907109。

摘　　要：The electric field imposes a significant effect on ice accretion on the insulator.The impact of an AC electric field on insulator icing in an artificial climate chamber has been addressed.Compared with AC,DC electric field exerts an attraction on supercooled water droplets,which is more detrimental to the power system.Moreover,the icing on energised insulators is rarely studied in the natural environment.In the present research,an electrical,fluid coupled‐field simulation was carried out on the insulator.The force characteristics and motion deviation features of water droplets at different positive DC electric field strengths were studied.On this basis,rime icing on the insulator energised with different positive DC voltages was investigated in the field.Results show that the charged droplet shifts along the electric field line under a positive DC voltage.The deviation degree of the droplet increases with the increment of the voltage and droplet size and decreases with an increase in wind speed.As the voltage rises,the surface roughness,icing amount and icing length of rime ice‐covered insulator increase.Consequently,compared with that without energisation,the local collision coefficient,icing amount and icing length increase by 17.6%,46.4%and 63.9%,respectively,under a 40 kV DC voltage.

关 键 词：INSULATOR FIELD POSITIVE 

分 类 号：TM41[电气工程—电器]