ABSTRACTWith the development of economy and the increasement of the electrical quantity, the running of the grid is threaten heavily. Countries to take multi-rate electricity policy to the peak and valley filling, balanced power. Multi-rate watt-hour meter has been replaced by a single-mode rate meter. With the increasing development of single chip technology based on single chip main control of the Electronic Energy Meter scale of production has become. However, low-cost, stable operation, high reliability and interference ability of the electronic power meters have to be developed.
This paper reviews the multi-function electronic energy meter energy measurement situation and the development of basic, focusing on the ΣA / D conversion principle for analysis. Articles in the energy measurement and digital signal processing theory, based on the United States for the ADI Corporation Health ADE7755 energy metering chips to the main control chip PIC16F877, using SCM technology designed and developed a single-phase multi-rate electronic energy smart Table. Modular hardware peripheral circuits voltage and current sampling module that will power can not be directly measured in a large voltage and high current can be used to deal with a small voltage and small current measurement. The source module provides the whole system stable power. Data storage module, infrared communication module and RS485 module can storage and exchange the power information. LCD module provides users with clear and real-time energy information. Software includes dynamic checking module, power pulse collection module, data storing and exchanging module, interrupted Communication module. Under the control of the single chip PIC16F877, the whole system can measure the electrical quantity in different periods of time and finishes the data exchanging.Key Words: electronic Watt-hour Meter, ADE7755, energy measurement, signal processing