论文部分内容阅读
绝缘子泄漏电流的检测是开关柜在线监测的一个重要方面。由于泄漏电流十分微弱,因此传感器的准确度和灵敏性至关重要。从电流互感器的误差角度入手,通过分析误差公式,讨论影响泄漏电流传感器准确度的6种因素,并设计了一套信号调理电路,同时对电流互感器和信号调理电路采取相应的保护措施。经实验验证所设计的泄漏电流传感器线性度误差为1.43%,分散性只有0.99%,满
Insulator leakage current detection switchgear is an important aspect of online monitoring. Due to the very weak leakage current, the accuracy and sensitivity of the sensor are crucial. Starting from the error of current transformer, by analyzing the error formula, the paper discusses six kinds of factors that affect the accuracy of the leakage current sensor, and designs a set of signal conditioning circuit. At the same time, it takes corresponding protection measures for the current transformer and signal conditioning circuit. The experimental verification of leakage current sensor linearity error of 1.43%, dispersion of only 0.99%, full