Design Of The Single-phase Inteligent Multi-tarif Watt-hour Meter

With the development of economy and the increasement of the electrical quantity, the running of the grid is threaten heavily. The government of China has adopted the policy of different prices of the electrical power, in order to keep balance of the electrical quantity comsuption. Multi-tarif Watt-hour Meter has taken the position of the single-tarif Watt-hour Meter widely. With the development of sigle-chip technology, the research of electronic Watt-hour Meter is produced in a huge range. But, the low-price Meter which runs stably and has strong ability to resist interference still need to be designed.The paper is based on the research of electric energy measurement theory and digital signal processing theory, mainly utilizes chip ADE7755 produced by ADI company to measure power, single chip PIC16F877 to control the whole system. The paper finished the design of The Single-phase Intelligent Multi-tarif Watt-hour Meter.The peripheral hardware adopted module design. Voltage and electricity module converts the high voltage and electricity to low ones that can be measured. 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.