Abstract
With the high development of our economy and the improvement of our living level，the electric power consumption is increasing greatly. It is very important for the implement of attempting automatically，assurance safety and economical running the electric Power network with fast and accurate testing and passing their parameters. It can also effectively help to improve the work and economy efficiency of our national power management.
Design of system is based on MCU ATmega16. Special electric power measurement chip named ADE7758 produced by AD Corporation is used for the collection of electric power. ADE7758 is a newest production with high precision. The ADE7758 is a high accuracy 3-phase electrical energy measurement IC. It can monitor the electric information of six passages，including active, reactive, apparent energy，VRMS，IRMS，power factor and etc. RS-485 can realize the inter link between the data and electric power information management system. 12864 can display multifarious real-time information of electric power.
In all，firstly，this paper introduce the development of electric instrument and the develop process and basic method of intelligent. Specially，the characteristic of ADE7758 and AVR microprocessor are introduced. Secondly，according to the technique index and function characteristic，it should decide the realization scheme of the whole system and divide whole system into four parts such as input transform system，AVR microprocessor，communication system，12864 display. Thirdly，base on the whole system scheme，the soft and hardware process of every part is described. The system can collect plentiful data information，work stably and reliable. Moreover，it has high accuracy and obvious intelligence.
Keywords: ADE7758; ATMEGA16; energy measurement; 12864
