The Field Monitor Of Power Measurement Based On ADE7753

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.