刘　君，胡　琳，刘翔宇，干建伟，沈文洋

(1.国网成都供电公司，四川 成都　610041；2.湖北兴和电力新材料股份有限公司，湖北 黄冈　438001)



封闭式绝缘管母线典型缺陷研究

刘君1，胡琳1，刘翔宇1，干建伟1，沈文洋2

(1.国网成都供电公司，四川 成都610041；2.湖北兴和电力新材料股份有限公司，湖北 黄冈438001)

摘要：为提高封闭式绝缘管母线运行可靠性，更有效地对其开展技术监督，开展封闭式绝缘管母线典型缺陷研究。根据聚四氟乙烯绕包成型封闭式绝缘管母线实际物理结构，建立JMAG电磁场仿真模型，设立层间逐层短路、受潮、气隙等不同典型缺陷，分析其电势、电场分布，并通过电容量及介损试验，研究其物理表征。

关键词：管母线；缺陷；仿真；试验

Abstract：In order to improve the operation reliability of enclosed insulated pipe bus and carry out more effective technical supervision, the study on typical defects of enclosed insulated pipe bus is carried out. According to the actual physical structure of enclosed insulated pipe bus winded by PTFE, the JMAG electromagnetic field simulation model is established. In the model, the different typical defects such as short circuit, moisture and air gap are built layer by layer, and their electric potential and electric field distribution are analyzed. The physical characterization is also studied through the tests of capacitance and dielectric loss.

Key words：pipe bus; defect; simulation; test

0引言

封闭式绝缘管母线由于其载流量大、集肤效应低、允许应力大、整体绝缘便于设计和安装，在变电站增容改造及新型紧凑型变电站中逐步使用[1-2]。封闭式绝缘管母线作为主变压器和用户母线的重要联结导体，直接影响着系统运行的稳定性及供电可靠性。封闭式绝缘管母线的全绝缘性能在一定程度上能避免变压器低压侧由于小动物、污秽、凝露等引起的近区短路，但由于当前封闭式绝缘管母线在我国的应用还处于初始阶段，质量监管未成体系，运行经验不足，因封闭式绝缘管母线受潮、放电、击穿等缺陷造成的停电事故时有发生[3-4]。因此，封闭式绝缘管母线绝缘结构的理论研究还需深入，对其监督方法还需要大量的积累和验证[5]。……