The Research And Design Of Multi-function Electronic Watt-Hour Meter Based On Energy IC ATT7022B

In recent years ,with the full implementation of the policy of national regulation peak averting electricity price, the demands of multi-function electric watt-hour meter go up rapidly. At the same time, DL/T645-2007"multi-function watt-hour meter communication protocol" and the DL/ T614-2007"multi-function watt-hour meter"are in the implementation, it is an urgent need for manufacturer to design a kind of multi-function watt-hour meter with the new industry standards and communication protocol as soon as possible.The article initially studies the measurement principle and the principle of work of multi-function electric watt-hour meter.In accordance with the relevant national standards and requirements, taking into account the performance and cost to determine the system design:use micro-controller chip M30624FGPFP and increase special measure chip ATT7022B as a basic platform, coupled with real-time clock RX-8025, 485 communication interface, data storage chips, power supply, display driver and other peripheral circuits to achieve the overall construction of the hardware.On the basis of hardware, it focuses on the use of modular software design methods to achieve the active and reactive energy measurement time, the amount required to measurement, communications, key display, anomaly detection and event records, such as brown-out detection functionality. The improvement of Flash memory file system for the construction, real-time clock of the temperature drift error by using software compensation technology is especially valuable for other areas to learn. The article analysis the reliability of the design of system, and introduces anti-jamming hardware technology and software technology and solve problems such as data security.Finally, multi-function watt-hour meter on a detailed test data show that the system hardware, software design meet the desired design requirements. The three-phase multi-function watt-hour meter accuracy class 0.5S for the active, reactive 2.0, meet the majority of low-voltage requirements of multi-function watt-hour meter and reach the design goal.