【作者】 李楠；

【导师】 王忠勇；

【作者基本信息】 郑州大学 ， 通信与信息系统， 2011， 硕士

【摘要】 各类电力计量装置在安装使用前必须依据相应的检测规定进行实验室首检,但在实际现场应用中,仅计量装置本身准确并不一定能最终保证电力计量的准确。在实际运行过程中,由于计量方式的不合理、运行方式的改变、电压互感器二次回路电压降过大、接线错误等原因,会造成计量误差过大,电量损失严重。现场检测仪能较直观、简便、迅速地检查和判断交流电力计量装置是否工作在正常状态,一旦发现交流电能表超差,即可及时予以调换,从而使用电单位在计量校准过程中免受停电所带来的困扰。本文综述了电力计量现场检测的意义,分析了电能表产生误差的原因,阐述了现场检测仪的原理；系统以MSP430F149控制器为核心,利用电能计量芯片ADE7753等,设计了电力计量装置的检测电路、时钟和数据存储等硬件模块；基于C和VHDL语言编写了系统软件,可对计量装置的一次和二次回路进行在线测量,实现了键盘输入、液晶显示、打印输出等功能。本设计的突出优点是采用2片电能计量芯片ADE7753同时对一次、二次回路的电压电流输入进行测量。由于ADE7753电流通道中多了HPF环节和数字积分器环节,电流通道输出数据较电压通道更稳定。因此,在对一次回路测量时将电压信号加在第1个ADE7753的电压通道,而将二次回路的电压信号加在第2个ADE7753的电流通道。实际上,由于一次、二次回路的电压都是相电压220V,这样取第2个ADE7753电流通道的输出值作为相电压的测量值会更加精确。这对提高仪表整体的精度等级是很有意义。更多还原

【Abstract】 All kinds of power measurement before the installation must be tested in laboratory based on the corresponding inspection regulations for the first prosecution. But in actual applications, only accurate measurement system itself does not finally guarantee the measuring precise. In the actual operating process, due to measurement way of unreasonable, operation mode change, voltage transformer secondary circuit voltage drop too large and wiring error, the measurement error will be excessive and the power will loss seriously. The field monitor can check and judge the communication power metering device whether it is working in normal condition intuitively easily and quickly. Once founding the watt-hour meter error is big, we can change it in time. From this way, power customers can avoid beset by blackout in calibration process.This article gives an overview of the significance of the field monitor of power measurement, analyzes the reasons for the errors caused by electric energy meter, elaborates the priniple of the field monitor of power measurement. With the core of MSP430,the system takes advantage of ADE7753, and designs hardware such as clock, data store and detection circuitry and so on. Write the system software with C and VHDL, measure the first and the second circuit on line and Carried out keyboard entry, liquid crystal display and print functions like output, etc.The prominent advantages of the design is that with two pieces of ADE7753, we can measure the voltage, electric current of primary loop and secondary circuit at the same time. Because the current ch of ADE7753 has digital integrator and HPF, the output of it is more stable than the voltage ch. Therefore, we put the voltage signal of primary loop into the voltage ch of the first ADE7753, and put the voltage signal of secondary circuit into the current ch of the second ADE7753. For all practical purpose, the voltage of primary loop and secondary circuit is both 220V, in this way, taking the second ADE7753 current output value of the same measurements as the voltage will be more accurate. This is very meaningful to raising the whole accuracy rate of meter.更多还原