Based On The Research Of ATT7022C Three-phase Design Of Smart Meters

With the recent construction of the State Grid Corporation of intelligent network planning, electronic energy meter of rapid technological development, information collection for electricity, two-way interaction, anti-tamper, remote meter reading and other technology advances, current development trend is Wide range of high reliability, due to the higher multiple of power meter overload, power meter more accurate measurement of the wide load range, so choose the wide range of highly reliable line of multi-functional smart meter can reduce customer load growth in the work of replacement of energy meter volume.Design of domestic equipment manufacturers are remote meter monitoring instruments, handheld instruments, portable and multifunctional analytical instruments. Point the remote instrumentation is installed in the field, the resulting data to the means of communication to first-bit data set upload a unified analysis and processing machines, not real-time online two-way interaction. Hand-held portable instruments by the technical staff, measurement analysis is relatively simple. Portable data processing function of a powerful instrument, but mainly for the special test site, the price is higher. In the technical solution, the traditional single chip can not meet the multi-functional and low precision, high-speed information exchange does not apply to real-time processing applications. DSP-based high-speed peripheral expansion of computer chips need more, more complex systems, development costs are higher, do not have practical value. Select measurement chip ARM processor plus ATT7022C can be human-computer interaction and data communications features are focused on the ARM subsystem, so that the whole system, small size, low power consumption, wide range, high reliability, have practical value.From the practical point of view the design and production of a technical index, functional requirements, electrical performance, adapt to the environment, anti-jamming and reliability are all consistent with the State Grid Corporation of smart meter technology requirements of the standard three-phase intelligent power meter. The entire hardware system, including power modules, data acquisition measurement modules, data storage module, MCU module, RS485 communication module, an external power line carrier communication module, keypad and display module, clock and alarm modules, and on this basis, the details of the whole various parts of the system software and hardware development process. The results show that, after the system hardware and software debugging, design phase intelligent power meter, stable performance, the indicators consistent with the State Grid Corporation of basic smart meter technology standards.