高压开关柜用介电功能梯度绝缘隔板电场调控特性分析  

Analysis on electric field control characteristics of dielectric functional gradient insulation partitions for high voltage switchgear

作　　者：沈海波 卞秋野 孙永健 史德生 郭振伟 SHEN Haibo;BIAN Qiuye;SUN Yongjian;SHI Desheng;GUO Zhenwei(State Grid Shandong Electric Power Company Lijin County Power Supply Company,Dongying 257400,China;State Grid Shandong Electric Power Company Dongying Power Supply Company,Dongying 257000,China)

机构地区：[1]国网山东省电力公司利津县供电公司,山东东营257400 [2]国网山东省电力公司东营供电公司,山东东营257000

出　　处：《绝缘材料》2024年第9期97-105,共9页Insulating Materials

基　　金：国网山东省电力公司科技项目资助,“应用于高盐雾环境的高压开关柜绝缘件制备技术研究”(520616230006)。

摘　　要：针对高压开关柜中绝缘隔板电场分布不均匀、局部电场畸变严重容易导致绝缘故障的问题,将介电功能梯度材料引入到绝缘隔板的制备中,提出了内部绝缘结构优化和表面绝缘结构优化两种优化方案。通过改变材料的介电常数上限、绝缘隔板厚度以及表面涂层厚度等参数进行电场、温度场仿真计算,对比分析其对电场分布优化效果的影响,最后对两种优化方案进行了仿真及介质损耗特性试验对比。结果表明:相较于传统的匀质绝缘隔板,在不考虑开关柜内部运行环境因素影响的条件下,改变内部绝缘结构和增加表面涂层都可以使沿面最大场强降低。当绝缘隔板厚度增加到12 mm时电场优化效果最优,沿面最大场强可降低69.8%;当表面涂层厚度为1 mm时电场优化效果最优,沿面最大场强可降低62.9%。通过仿真及试验对比证明,内部绝缘结构优化的隔板电场调控效果及绝缘性能更优。In view of the problem of uneven electric field distribution and severe local electric field distortion in insulation partitions of high-voltage switchgear,dielectric functional gradient materials were introduced into the preparation of insulation partitions,and two optimization schemes,which are internal insulation structure optimization and surface insulation structure optimization,were proposed.By changing the upper limit of dielectric constant of material,the thickness of insulation partition,and the thickness of surface coating,electric field and temperature field simulation calculations were carried out to compare and analyze their effects on the optimization of electric field distribution.Finally,simulations and dielectric loss characteristics tests were conducted to compare the two optimization schemes.The results show that compared to the traditional homogeneous insulation partitions,changing the internal insulation structure and adding surface coatings can reduce the maximum field strength along the surface without considering the influence of internal operating environmental factors in the switchgear.When the thickness of insulation partition increases to 12 mm,the electric field optimization effect is optimal,and the maximum field strength along the surface can be reduced by 69.8%.When the surface coating thickness is 1 mm,the electric field optimization effect is optimal,and the maximum field strength along the surface can be reduced by 62.9%.Through simulation and experimental comparison,it is proved that the partition with optimized internal insulation structure has better electric field control effect and insulation performance.

关 键 词：高压开关柜 介电功能梯度 绝缘隔板 电场调控 介质损耗 

分 类 号：TM215[一般工业技术—材料科学与工程]