电网技术Issue(7)：2035-2040,6.
雨凇对导线起晕电压影响规律的研究
Influence of Glaze on Corona Inception Voltage of Stranded Conductor
摘要
Abstract
Glaze affects secure operation of transmission line seriously, and icicles caused by glaze makes the electric field on conductor surface distorted and then the corona onset voltage characteristic of conductor is affected. A lot of researches on corona characteristics of conductors are performed home and abroad, most of them utilize aluminum pipes to simulate actual conductors and the influences of ice-coating on corona onset voltage of conductor are not analyzed in depth. A series of AC corona tests for ice-covered steel cored aluminum stranded wire LGJ-185/25 due to glaze are implemented in artificial climate chamber, in the tests the ultraviolet imager and curve fitting method are used to measure and analyze the corona onset voltage of stranded conductor, and according to the form of glaze-caused icicles a finite-element model is established to calculate the maximum field strength. Test results show that glaze leads to the decrease of corona onset voltage of stranded conductor;the increase of ice-coating thickness makes the corona onset voltage of stranded conductor continuously decreased and finally it gradually decreases to its steady value;the form of glaze does not changed with different conductivities of freezing water, however the increase of salinity makes the corona onset voltage of stranded conductor continuously decreased. The obtained results are available for reference to the design of transmission lines located in the region where the glaze frequently occurs.关键词
钢芯铝绞线/雨凇覆冰/起晕电压/覆冰水电导率/紫外成像Key words
stranded conductor/glaze-caused ice-coating/corona onset voltage/conductivity/ultraviolet imagery分类
信息技术与安全科学引用本文复制引用
陈吉,蒋兴良,舒立春,胡建林,张志劲,张满..雨凇对导线起晕电压影响规律的研究[J].电网技术,2013,(7):2035-2040,6.基金项目
国家重点基础研究发展计划项目(973计划)(2009CB-724502,2009CB724501)；国家重点实验室项目(2007DA10512708101,2007DA10512708102)。@@@@Project Supported by National Basic Research Program of China (973 Program)(2009CB724502, 2009CB724501) and State Key Laboratory Project (2007DA10512708101, 2007DA10512708102) （973计划）
