1 MV气体绝缘Tesla变压器支撑绝缘子的闪络特性实验与优化设计  

Experiment and optimal design of flashover characteristics of supportinsulators for 1 MV gas insulated Tesla transformer

作　　者：葛建伟 李俊娜[1] 李奇胜 刘建 史浩良 李楚男 陈旭良 崔光曦 Ge Jianwei;Li Junna;Li Qisheng;Liu Jian;Shi Haoliang;Li Chunan;Chen Xuliang;Cui Guangxi(State Key Laboratory of Electrical Insulation,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学电气绝缘国家重点实验室,西安710049

出　　处：《强激光与粒子束》2023年第9期111-116,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(52177157)。

摘　　要：输出高电压等级的同时,为实现Tesla变压器的小型化、轻量化设计,研究了0.5 MPa SF_(6)气体环境中支撑绝缘子沿面闪络特性与表面电场的关系,利用有限元法建立了Tesla变压器的电场仿真模型,结合实验研究分析了支撑绝缘子沿面闪络过程,阐明了Tesla变压器关键绝缘部件的场等效实验方法和结论,根据上述分析优化支撑绝缘子结构。优化后的支撑绝缘子凹侧沿面电场最大值下降约81.5%,切向电场强度平均值降低约10.3%,法向电场强度平均值降低约30%,沿面距离增长11.8%,电场不均系数从5.03下降为1.20,电场分布改善明显,预计可以耐受1 MV负极性微秒脉冲电压。To realize the miniaturization and lightweight design of Tesla transformer with high output voltage,the relationship between the surface flashover characteristics of support insulators and the surface electric field in a0.5 MPa SF_(6)gas environment is studied.The electric field simulation model of Tesla transformer is established usingthe finite element method.Combined with experimental research,the surface flashover process of support insulators isanalyzed,and the field equivalent experimental methods and conclusions of key insulation components of Teslatransformer are clarified.Based on the above analysis,the structure of support insulators is optimized.Afteroptimization,the maximum electric field along the concave side of the support insulator decreases by about 81.5%,theaverage value of tangential electric field intensity decreases by about 10.3%,while the average value of normal electricfield intensity decreases by about 30%,the distance along the surface increases by 11.8%,and the electric fieldunevenness coefficient decreases from 5.03 to 1.2.The electric field distribution is significantly improved,and theoptimized insulator can withstand 1 MV negative polarity microsecond pulse voltage.

关 键 词：TESLA变压器 支撑绝缘子 微秒脉冲 沿面闪络 表面电场 

分 类 号：TM854[电气工程—高电压与绝缘技术]