带有自供电功能的电流测量传感器的设计  

Design of a current measuring sensor with self-power supply function

作　　者：邵庆祝[1] 谢民[1] 王同文[1] 俞斌[1] 李雪冬 SHAO Qingzhu;XIE Min;WANG Tongwen;YU Bin;LI Xuedong(State Grid Anhui Electric Power Company,Hefei 200090,China;Beijing Join Bright Digital Power Technology Co.,Ltd.,Beijing 100085,China)

机构地区：[1]国网安徽省电力公司,安徽合肥200090 [2]北京中恒博瑞数字电力科技有限公司,北京100085

出　　处：《电力系统保护与控制》2020年第16期155-162,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51707117);国网安徽省电力有限公司科技项目资助(52120017001G)。

摘　　要：为保证电力系统在线监测工作的顺利展开,促进电流传感器的自供能和智能化,设计了一种自供电型电流测量传感器。该传感器可以同时实现测量和供电两个功能。通过推导互感器一次侧电流与二次侧电压电流之间的数学关系,建立了通过整流桥前后电压、电流信号进行线路电流测量的模型,给出了电流测量装置的总体设计思路。最后用实验验证了不同测量模型的正确性,分析了负载变化时的测试结果。In order to ensure the smooth development of online monitoring of an electric power system,and promote the development of self-power and intelligence of a current sensor,a type of current measuring sensor with self-power supply function is designed.The two functions of measuring and supplying power are realized using one transformer.This paper deduces the mathematical relationship of voltage and current between primary side and secondary side of the transformer,and the situations before and after the rectifier bridge are taken into account.The general design idea of the current measuring device is given.Finally,the correctness of different measurement models is verified by experiment,and the test results of the load change are analyzed.

关 键 词：电流测量 在线监测 自供电 互感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM73[自动化与计算机技术—控制科学与工程]