【摘要】 根据高压电能计量系统故障特点,设计了四组八路故障检测电路.通过分析系统故障,选取检测点.针对电能表端口电压信号微弱,不易检测的问题,在电能表端口处增加了前置放大器以提高检测信号的信噪比.基于计量系统阻抗检测模型,对测量互感器进行了大量试验,确定并优化检测电路参数,提高了系统对电流互感器一次侧短路故障的检测能力.实际应用表明电路能有效地提供故障检测数据.更多还原

【Abstract】 According to the fault characteristics of high voltage electric power metering system,we design eight-way detection circuits.With the analysis of system fault we choose detection points.In view of weak voltage signal of port of electric energy meter and difficulty in detection,we add a preamplifier to the port of electric energy meter to improve signalto-noise ratio of detection signal.On the basis of impedance detection model for high voltage electric power metering system,we carry out a lot of experiments on the measurement transformer to determine and optimize parameters,and improve the ability of the system to detect short circuit fault of the primary side of circuit transformer.The practical application shows that circuits can effectively provide data for fault detection.更多还原