Study On The Design Technique Of MSP430 Based Digital Electricity Meter

The electric energy is a guarantee to national economy and daily life in modern society. With the fast development of the society, contradiction between the demand and production of electrical energy occurs. Time-scheduled tariff system, that changes user's behavior in energy consuming and rationalizes the electrical energy utilization, is an effective and valuable measure to solve this problem. For the energy measurement the traditional mechanical electricity meter no longer can meet the requirements of this new tariff system, and microcontroller-based digital E-meter becomes the prerequisite and backbone of this tariff system.The author of this dissertation carried out the study on the design technique of digital E-meters that support time-scheduled tariff system, main job includes:● An overall design of an MSP430 microcontroller-based E-meter with cost-effectiveness and unique voltage and current input channels;● A study on the TI's Reduced Scan Principle, and transplanted this algorithm into a average power based approach for electric energy measurement;● Design methods that integrates the MSP430C323's limited hardware and software resources to implement real-time clock, I2C and serial communication interfaces;● With E-meter as a platform, a study on the fundamental's and techniques of low-power design that might be of reference value to other low-power process measuring devices.