Design Of Three-phase Electric Power Meter Based On Multi-communication Mode

From the initial inductive meters to the popular used electronic meter, electronic power meter has a history of more than 100 years. Modern high-end electric meter had greatly inproved in accuracy, reliability, and function diversity,etc. The development of intelligent grid put forward new requirements to measuring meter, including digital information collection, standardized communication platform, modular software and hardware design, intelligent function and perfect communication security system.Paper designed a three-phase electronic meter based on multi-communication mode, using MCU and special measuring chip ATT7022B. There are three external communication modes, them are power line carrier-current, GPRS, and RS485. The meter has high accuracy and reliability, rich function, and low price. Full text is divided into five parts.Chapter 1 is the introduction part, which introduced the development statusnd tendency of energy meters, pointed out the background adn significance of the research, and expounded the main research contents of this paper.Chapter 2 expouned the relevant principle of three-phase energy meter, including the principle of energy metering and communication using SPI and I2C bus, and the research of lower level channel and uplink channel of communication.Chapter 3 is the hardware design part. Based on the basic principle analysis in chapter 2, and according to the function requirements of energy meter,designed the related circuit. Including the information collecting and electricity measuring module, data storage module, external communication module, power supply module and the disigning of MCU peripthe circuit.Chapter 4 is the software design part. Software design is based on the hierarchical, modular designed each level, including system initialization, the clock module, drop electric processing modules, electricity measurement modules, external communication module, SPI bus module, and the I2C bus software realization.The conclusion of this paper summarized the main work, innovative point system is presented and the shortage, points out the future research direction.