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Design of Self-powered Lightning Current Measurement System
Author(s): DU Lin, LUO Yuying, LIU Jun
Pages: 1306-
1311
Year: 2014
Issue:
5
Journal: High Voltage Engineering
Keyword: lightning current monitoring; signal coil; power harvesting coil; signal conditioning; self-powered; power supply circuit;
Abstract: 为向输电线路雷击大电流测量装置提供稳定可靠的电源,基于电磁感应原理设计了一种自供能雷电流监测装置,在雷电流入地通道(杆塔、避雷针、接地引下线)上安装信号线圈和取能线圈,当取能单元被雷电流触发后,即开始获取雷电流电磁能量,同时,信号线圈将对雷电流极性和峰值进行采样和存储.通过理论推导并借助Saber软件,最终确定取能和信号线圈的结构,并合理选取其尺寸等参数.研究结果表明,前置取能线圈能够通过连接相应的电能适配电路,向负载电路进行稳定供能.雷电流传感器能够对幅值介于10~200kA之间的雷电流进行线性测量.
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