抗冲击弱电流传感器特性分析  

Characterization Analysis of Anti-impact Weak Current Sensor

作　　者：苏成志 徐玉东[1] 王恩国[1] 曹国华[1] 

机构地区：[1]长春理工大学机电工程学院,长春130022

出　　处：《高压电器》2013年第2期49-54,共6页High Voltage Apparatus

基　　金：吉林省科技支撑基金(20100371)~~

摘　　要：在线监测电涌保护器漏电流,判断其失效程度,减少因雷电和电力需求增加引起的电涌造成电气设备损失。提出了一种基于互感型电流传感器的电涌保护器失效程度在线监测的方法,建立了雷电电流和电流传感器数学模型,分析了线圈匝数、负载电阻和杂散电容对电流传感器测量精度和抗冲击性影响,采用雷击和被测电流叠加后的复合信号作为激励,仿真研究了参数优化后电流传感器的时域响应特性。实验证明,在0.2～9 mA的电流测量范围内,笔者设计的互感型式电流传感器可抵抗50 kA大电流冲击,电流测量误差小于0.11 mA,满足漏电流在线监测要求。The electrical equipment loss caused by the lightning and power＇s increasing demand is reduced by monitoring the extent of the surge protector failure using measuring its leakage current on-line. Proposed a method of monitoring the surge protector＇s failure degree online based on mutual inductance current sensor, established its mathematical model, analyzed the influence of coil turns, load resistance and stray capacitance on the effect of current sensor＇s measuring accuracy and impact resistance use lighting and tested current compound signal incentive after superposition.Experiments show： where the measured current range is 0.2-9 mA, the mutual inductance current sensor designed can resist the impact of 50 kA high current, the current measurement error can be less than 0.11 mA, and meet requirement of the leakage current on-line monitoring.

关 键 词：互感线圈 电流传感器 抗冲击 在线监测 

分 类 号：TM862[电气工程—高电压与绝缘技术] TP212[自动化与计算机技术—检测技术与自动化装置]