面向工厂过电保护的避雷器动态监测研究

Research on Dynamic Monitoring of Lightning Arrester for Factory Over-voltage Protection

避雷器动态监测关系到工厂的供电系统安全。为此,研究结合谐波数字分析法与全电流绝对测量法构建面向工厂过电保护的避雷器动态监测模型。受潮实验结果表明,一般受潮情况下避雷器各测点的电流范围为2.29mA,整体避雷器泄露电流的的阻性峰值和全电流峰值分别为0.329mA和2.864mA;严重受潮情况下避雷器各测点的电流范围为1.26mA-3.06mA,整体避雷器泄露电流的的阻性峰值和全电流峰值范围分别约为3.636mA和3.393mA。以上结果说明,避雷器动态监测模型的稳定性好、精度高,是一种理想的避雷器动态监测方法。

The dynamic monitoring of arrester is related to the safety of power supply system.Therefore,the dynamic monitoring model of arrester for factory over-current protection is built by combining harmonic digital analysis method and full current absolute measurement method.The experimental results show that the current range of each measuring point is 2.29 mA,and the peak value of resistance and total current are 0.329 mA and 2.864 mA respectively.The current range of each measuring point of the arrester is 1.26 mA~3.06 mA in the case of severe damp,and the peak resistance and full current range of the overall arrester leakage current are about 3.636 mA and 3.393 mA respectively.The above results show that the dynamic monitoring model of arrester has good stability and high precision,and it is an ideal dynamic monitoring method of arrester.