Influence of Oil Paper Composition on the Space Charge Characteristics
Influence of Oil Paper Composition on the Space Charge Characteristics
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DOI：
10.17775/cseejpes.2015.00029
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发表时间：
2015-09-01
影响因子：
7.1
通讯作者：
Li, Shengtao
中科院分区：
文献类型：
--
作者：
Chen, C. H.;Wu, Kai;Li, Shengtao
油纸绝缘内部的空间电荷会严重扭曲电场分布，导致材料电性能下降。大量关于不同条件下油纸绝缘空间电荷特性的文章已经发表；然而，很少报道油纸成分的影响。本文对变压器油（昆仑25号油和尼纳斯油）和纸张（XD厂生产的ⅰ型、法国进口的ⅱ型）四种组合的空间电荷分布和电导率进行了比较。结果表明：ⅱ类纸与昆仑油的组合性能较好，材料内部电荷积累最小；为了理解这种现象，空间电荷测量的结果和电导率是相关联的。对两种纸张进行了显微检查，以获得纸张的表面状况。讨论了空间电荷注入量与纸张表面状况的关系。观察到较高的油导电率和光滑致密的纸表面可以抑制油纸绝缘中的空间电荷。
Space charge inside oil paper insulation can severely distort the electric field distribution and lead to degradation of electrical performance of materials. A vast number of articles about the space charge characteristics of oil paper insulation under different conditions has been published; however, few report the influence of oil paper composition. In this paper, a comparison of the space charge distribution as well as the electrical conductivity of four combinations of transformer oil (Kunlun #25 and Nynas oil) and paper (type I from XD factory, type II imported from France) is carried out. The results show that the combination of type II paper and Kunlun oil performs well with minimal charge accumulation inside the materials. To understand the phenomenon, results of space charge measurements and electrical conductivity are associated. A microscopic inspection of two types of paper is conducted to acquire the surface condition of the paper. The relationship between space charge injection quantity and surface condition of the papers is discussed. It is observed that a relatively higher conductivity of oil as well as a smooth, dense surface of paper can suppress space charge in oil paper insulation.