摘要
集磁环式光学电流互感器(OCT)利用磁光材料的法拉第磁光效应进行电流测量。根据安培环路定律,集磁环式OCT将磁场集聚在光学材料附近,通过对光学材料的磁场测量能近似反映整个闭合回路的磁场情况,进而反映电网的电流信息。因此,集磁环结构的设计对传感头的测量效果起关键作用。通过建立集磁环式OCT磁路的数学模型,阐述其工作原理和基本特性,其中包括灵敏度特性、磁特性和抗干扰特性。将这3种基本特性作为优化集磁环式OCT性能的指标,利用Ansoft有限元仿真软件对互感器的结构进行优化,确立了最佳优化尺寸。优化后的集磁环式光学电流互感器精度达到0.2级设计要求。
Faraday magnetooptical effect is applied in the OCT（Optical Current Transformer） with magnetic concentrator ring,which intensifies the magnetic field nearby the optical material according to the Ampere loop law. The current information is obtained by measuring the magnetic field of optical material. Therefore,the structural design of magnetic concentrator ring is the kernel. Its mathematical model is established and its working principle is explained. Three basic factors are introduced： sensitivity characteristic,magnetic property and anti-interference characteristic,which are taken as its optimization indicators. Ansoft,the finite element simulation software,is used to optimize its structure and the precision of optimized OCT reaches the 0.2-class.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第9期23-26,31,共5页
Electric Power Automation Equipment
基金
国家自然科学基金重大项目(11004040)~~
关键词
互感器
光学电流互感器
磁路
磁场
磁光效应
集磁环
气隙
设计
electric instrument transformers
optical current transformer
magnetic circuits
magnetic fields
magnetooptical effects
magnetic concentrator ring
air gap
design
