CT励磁特性测试的直流原理实现  

Test excitation characteristics of current transformer by DC methods

作　　者：袁世炯 

机构地区：[1]四川电力试验研究院,四川成都610072

出　　处：《中国测试》2010年第6期18-20,共3页China Measurement & Test

摘　　要：电流互感器励磁特性是计量和保护的重要参数,前者涉及电能计量和损耗测试,后者关乎保护装置的灵敏度和电力系统可靠运行。针对CT的常规测试要求,采用对励磁特性的相关测试方法,推出基于等效磁通原理的直流测试,该方法可以省去传统方法的升流升压设备,大幅度有效降低测试电压和设备体积,不仅适用于励磁特性曲线测试,还适用于精确励磁线性参数测试并用于计量误差计算。Excitation characteristics are essential for metering and protecting current transformers.In the sense of metrology,the characteristics affect power measurement and loss test,and in the sense of protection,they relate with the sensitivity protection of the equipment and the reliability of electric power systems.This paper briefly reviewed common requirements on metrology,protection and related test methods for current transformer,which was taken as a basis for unfolding DC testing method with the principle of equivalent magnetic flux.The method features with portable and low voltage design and reduces the traditional accessories like voltage and current ramping up equipment.It can be used to measure excitation curve,and it also can be used to measure accurate excitation linear parameter and error calculation.

关 键 词：励磁特性 励磁损耗 励磁特性曲线 误差 拐点电压 

分 类 号：TM452[电气工程—电器] TM930.12