保护用超大电流互感器结构优化设计数值仿真分析  

Numerical Simulation Analysis on Core Structure Optimization of Heavy Protective Current

作　　者：邢金[1] 江波[2] 赵伟[1] 黄松岭[1] 

机构地区：[1]清华大学电机工程与应用电子技术系电力系统国家重点实验室,北京100084 [2]四川电力科学研究院,成都610072

出　　处：《电测与仪表》2013年第5期1-4,76,共5页Electrical Measurement & Instrumentation

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.

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 

分 类 号：TM452[电气工程—电器]