基于MSP430单片机的用电管理终端CT检测新技术  

A new technology of CT Testing in electro-managing terminals based on microcontroller MSP430

作　　者：刘欲燃[1] 全惠敏[1] 戴瑜兴[1] 季硕[1] 刘国清[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]长沙矿山研究院有限责任公司,湖南长沙410012

出　　处：《电源技术》2012年第12期1876-1879,共4页Chinese Journal of Power Sources

基　　金：广东省教育部产学研结合项目(2010B090400213)

摘　　要：提出一种利用终端内部电路检测外部一次计量电流互感器(以下简称CT)二次侧接线状态的方法。该方法在终端内将测试CT的一次侧与被测CT的二次侧连接,在测试CT的二次侧接上电容与反相器组成自激振荡电路。同时利用终端内置MSP430单片机测试自激振荡电路波形的频率特征,来获得该被测CT二次侧电路的开路、短路、部分短路或正常的接线状态信息。通过实验和现场应用,得出该设计合理、性能稳定、算法可行。A method with the internal circuits of terminals to detect their extemal wiring states of primary measuring current transformers （CT）＇ secondary sides was proposed in this paper. Through connecting the primary side of the testing CT with the secondary side of the tested CT in the terminal, and connecting the secondary side of the testing CT with a capacitance and an inverter, which made up a self-oscillation circuit, meanwhile using the built-in microcontroller MSP430 of the terminal to test frequency characteristics of the circuit waveform of the self-oscillation, circuit of the tested CT＇ secondary side, such as open circuit, short circuit, partial short circuit, normal circuit was obtained. The experiments and field applications prove this design is reasonable, whose function is stable and the arithmetic is feasible.

关 键 词：CT检测 用电管理终端 开短路 部分短路 

分 类 号：TM452[电气工程—电器]