Research on breakdown characteristics of converter transformer oil-paper insulation under compound electric field in alpine region
In the paper,existing research and operating experience was summarized.On the basis,the particularity of oil-paper insulation operation condition for converter transformer was combined for studying the influence of temperature on oil-paper insulation field intensity distribution of converter transformers under different AC contents within wide temperature scope(-40℃~105℃).The law of temperature gradients on space charge accumulation was analyzed.The breakdown or flashover characteristics of typical oil-paper compound insulation structure under the action of DC,AC and AC-DC superposition voltage at different temperatures were explored.The design principles of converter transformer oil-paper insulation structures in alpine region was proposed.The principle was adjusted and optimized properly according to the operation temperature scope and withstood AC-DC proportion.The reliability of transformer operation was improved on the one hand,and the insulating medium can be rationally utilized for reducing the manufacturing cost of the transformer on the other hand.
C Xu Z W Gao S Lan H X Guo M C Gong
State Grid Heilongjiang Electric Power Company Limited Electric Power Research Institute,7 Xiangjiang River Road,Harbin,China
国际会议
三亚
英文
1-8
2017-11-18（万方平台首次上网日期，不代表论文的发表时间）