电工技术学报2016，Vol.31Issue(23)：132-140,9.
G/E在液氮和变压器油中的雷电冲击沿面闪络特性对比
Compare of Lightning Impulse Surface Flashover Characteristics for G/E in Liquid Nitrogen and Transformer Oil
摘要
Abstract
As the voltage level of super conducting power devices increasing,the significance of the study on flashover characteristics in liquid nitrogen becomes more and more important.Glass fiber reinforced epoxy composite material(G/E)is an important insulating and supporting material for HTS device.For deeper exploring the surface flashover characteristics in liquid nitrogen,the differences of flashover voltages,flash over time and flashover traces for G/E material are compared under different voltage applied methods in liquid nitrogen and transformer oil by experiments.It is believed that because of the different characteristics of liquid nitrogen and transformer oil,there would have different stresses caused by temperature shock on the surface of solid dielectric and differences on forming process,constituents and decomposition product of gas layers when flashover in the two environments.Those are the main reasons of different flashover phenomenon in the two environments.By the method of contrastive analysis,the impulse surface flashover characteristics in liquid nitrogen are deeper explored,the results could provide principle reference for dielectric design of HTS devices.关键词
雷电冲击沿面闪络/液氮/变压器油/玻璃纤维增强环氧树脂复合材料/气化层Key words
Lightning impulse surface flashover/liquid nitrogen/transformer oil/G/E/asifying layer分类
信息技术与安全科学引用本文复制引用
杨鑫,李卫国,魏斌,张宏杰,丘明..G/E在液氮和变压器油中的雷电冲击沿面闪络特性对比[J].电工技术学报,2016,31(23):132-140,9.基金项目
国家自然科学基金面上项目(51277063)和国家自然科学基金青年基金项目(51407013)资助. （51277063）
