电能计量设备防电流法窃电新技术  

A novel technique of preventing electricity-stealing in current method for electric power measuring equipment

作　　者：韩谷静[1] 殷小贡[1] 秦亮[1] 杨玲君[2] 

机构地区：[1]武汉大学电气工程学院,武汉430072 [2]武汉大学电子信息学院,武汉430072

出　　处：《电测与仪表》2007年第10期29-32,共4页Electrical Measurement & Instrumentation

摘　　要：对单相或三相电能计量设备的电流变送器进行改进,每相增加两组高频互感线圈。高频探测信号由计量设备侧向计量电流互感器二次侧注入,用先进的ARM微处理器对耦合回路计量设备侧的高频信号进行采样和实时计算,即能准确识别计量电流互感器二次侧回路正常、开路及短路状态,从而有效防止电流法窃电。The novel technique proposed modifies the current coupling device in single-phase or three-phase electric power measuring equipment, and adds two high-frequency coupling windings to each. The high-frequency detection signals generated in electric power measuring equipment are injected into current transformer secondary side. At the same time, the advanced ARM microprocessor is adopted for sampling the high-frequency signals coupled back and real-time computation. It can recognize the normal, opened or shorted state of current transformer secondary side circuit correctly and prevents electricity-stealing in current method effectively.

关 键 词：防窃电 电流法窃电 电流互感器 高频信号 ARM微处理器 

分 类 号：TM933.4[电气工程—电力电子与电力传动]