导线表面电场强度对导线覆冰的影响  

Influences of Electric Field of Conductors Surface on Conductor Icing

作　　者：尹芳辉[1,2] 蒋兴良 Masoud Farzaneh[2] YIN Fanghui1,2, JIANG Xingliang1, Masoud Farzaneh2(1. State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology, Chongqing University, Chongqing 400044, China; 2. Canada Research Chair on Engineering of Power Network Atmospheric Icing （INGIVRE）, University of Quebec at Chicoutim, Chicoutimi G7H2B 1, Canada)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]魁北克大学希库蒂米分校电网设备大气覆冰试验室,加拿大希库蒂米G7H281

出　　处：《高电压技术》2018年第3期1023-1033,共11页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501);国家创新研究群体基金(51021005)~~

摘　　要：为研究导线表面电场强度对导线覆冰的影响,在魁北克大学希库蒂米分校电网设备大气覆冰试验室（INGIVRE）的人工气候室内通过电晕笼进行导线带电覆冰试验。试验结果表明导线表面电场强度对导线覆冰质量、形状、冰凌间距、电晕损失以及泄漏电导和导线电容等产生影响。电场强度的增加使雾凇表面产生水膜、雨凇冰凌长度减少。当导线表面电场强度≤20 kV/cm时,导线表面覆冰质量随电场强度的增加而增加。电场强度进一步增加时,导线表面覆冰质量减少。当被导线捕获的水滴在重力作用下流到导线下表面后立即被冻结时,冰凌间距和场强无关。当降雨量较大时,冰凌间距随着场强的增加而减少。导线在雾凇和雨凇覆冰时,电晕损失和由电晕产生的电导随场强的增加而增加。雨凇覆冰时,由于冰凌长度的影响,导线表面电场强度为5 kV/cm时导线的单位长度电容反而比电场强度为25 kV/cm时大。To investigate the influences of electric field of conductors surface on conductor icing, experiments were carried out in a climate room based on corona cage at INGIVRE laboratories, University of Quebec in Chicoutimi（UQAC）. The experimental results show that the electric field has significant influences on ice weight and appearance, icicle spacing, corona loss, leakage conductance, and capacitance. With the increase of electric field, water film could be observed on the conductor surface under rime accretion and the length of icicles decreases under glaze ice accretion. Under both rime and glaze ice conditions, the weight of ice accreted increases with electric field strength up to 20 k V/cm and then decreases as it increases further. When the precipitation rate is low, and the water film is frozen immediately when it reaches the bottom of the conductor due to gravity, the icicle spacing is independent of the conductor surface electric field. When the precipitation rate is sufficient, icicle spacing decreases as the electric field at the surface of the conductor increases. For both rime and glaze ice accretion, the corona loss and the leakage conductance induced by corona discharge increase with an increase of electric field. Under glaze ice condition, due to longer icicles, the capacitance per unit length is higher when the electric field is 5 k V/cm compared with that of 25 k V/cm.

关 键 词：带电覆冰 冰凌间距 电晕笼 电晕损失 泄漏电导 导线电容 

分 类 号：TM752[电气工程—电力系统及自动化]