摘要
鉴于安装在1000MW级大型发电机组出口处母线上的保护用超大电流互感器(HPCT),会受到邻相母线电流产生的强电磁干扰的影响,本文基于数值仿真分析,对HPCT的铁心结构进行了优化设计。具体地,对HPCT在铁心气隙总长度一定条件下,不同气隙数量对HPCT稳态及暂态工作状态的影响进行了计算和分析;并对HPCT铁心气隙与邻相母线相对位置的不同情况下HPCT的抗电磁干扰性能进行了研究,进而提出了为确保HPCT具有足够大抗电磁干扰能力的铁心结构的优化改进措施。
This paper introduces the researche on the core structure optimization design of heavy protective current transformers which are used in the 1000MW large generator and affected by the adjacent bus-bar.Firstly,the effect of the number of air gaps in the core on the steady and transient state of HPCT is evaluated.Secondly,the ability of resistance to electromagnetic interference is researched based on the air gaps relative to the position of the adjacent bus-bar.Finally,the further improvement measures on the core structure,which will make sure HPCT having enough ability of resisting electromagnetic interference are given.
出处
《电测与仪表》
北大核心
2013年第5期1-4,76,共5页
Electrical Measurement & Instrumentation
关键词
保护用超大电流互感器
电磁干扰
铁心结构
优化设计
protective current transformer
electromagnetic interference
core structure
optimization design
