输电线路融冰初期冰闪机理试验研究  

The Experiment Study of Flashover Mechanism in the first Icing Period of Transmission Lines

作　　者：彭向阳[1] 姚森敬[1] 周华敏[2] 魏远航[2] 

机构地区：[1]广东电网公司电力科学研究院,广州500800 [2]广东电网公司,广州500800

出　　处：《南方电网技术》2011年第A02期41-41,共1页Southern Power System Technology

摘　　要：覆冰绝缘子串的冰闪事故一般发生在输电线路融冰初期。针对这一现象提出了盐析及污秽在冰层中迁移的观点。通过盐析及污秽在冰层中迁移试验，从机理上解释了该现象的原因。试验证明污秽程度越高，迁移过程越快；融冰水电导率为覆冰水电导率的1．5～2．5倍，且凝结时间愈长，迁移时间愈充分，融冰水电导率的变化愈明显。Flashover faults on insulator strings usually happened in the first icing period of transmission lines. For that phenomena a view of salting-out and the transport of filth in ice is proposed in this paper. Through salting-out tests and filth transport tests in ice, the phenomena is explained, and it is certified that the higher level of unclean, the faster the migration process, and the conductivity of meltwater is 1.5 to 2.5 times of icing water, and the longer the condensing time, the longer the migration time, resulting in a obvious change of meltwater conductivity.

关 键 词：盐析 冰闪机理 覆冰试验 迁移 

分 类 号：TM216[一般工业技术—材料科学与工程]