摘要 在空气间隙中引入隔板组成气固复合绝缘,可以显著提高间隙的耐压水平。为了研究不同因素对多隔板气固复合绝缘工频击穿特性的影响,本文通过改变多层隔板的水平位置、竖直尺寸、材料进行耐压实验,用摄像仪捕捉击穿路径分析放电规律,最后结合仿真分析电场分布变化。结果表明:双层隔板和三层隔板都对击穿电压起到了提升作用,隔板竖直尺寸越大,隔板水平位置离电极越近,击穿电压越高;三种材料隔板中,聚氯乙烯隔板对耐压性能的改善效果较优。隔板竖直尺寸是影响路径概率变化的重要因素,实际击穿路径大部分是沿着隔板表面发展;击穿路径长度越长,击穿电压越高;不同隔板位置对击穿电压的影响主要取决于电场分布的变化。研究结果可以为气固复合绝缘的设计和优化提供参考。 The withstand voltage level of air-insulated gap can be significantly improved by introducing a polymer barrier inserted into the air gap to form a hybrid gas-solid insulation.In order to study the influence of different factors on AC breakdown characteristics of multi-barrier hybrid gas-solid insulation.The breakdown experiment is carried out by changing the horizontal position,vertical size,and material of the multi-barriers,and the breakdown path is captured by a camera to analyze the discharge behavior,finally the electric field distribution is analyzed by simulation.The results show that both two-barrier hybrid insulation and three-barrier hybrid insulation have a positive effect on improving the breakdown voltage.When the vertical size of barrier is larger and the barrier is closer to the electrode,the breakdown voltage is higher.Among three kinds of barriers,polyvinyl chloride barriers have better improvement effect on the withstand voltage property.The barrier size is a key factor affecting the path probability,and most of the breakdown paths develop along barrier surface.When the breakdown path lengthis longer,the breakdown voltage is higher.The influence of different barrier positions on the breakdown voltage mainly depends on the variation of the electric field distribution.The research results can provide a reference for the design and optimization of hybrid gas-solid insulation.
机构地区 福州大学电气工程与自动化学院
出处 《电气开关》 2021年第1期59-64,共6页 Electric Switchgear
基金 国家自然科学基金项目(51607041) 电力系统国家重点实验室资助课题(SKLD19KM06)
关键词 多层隔板 气固复合绝缘 击穿电压 击穿路径 multiple barriers hybrid gas-solid insulation breakdown voltage breakdown path
