DESIGN OF SINGLE-PHASE POWER METER BASED ON ETHERNET

According to the related technology about power meter, single-phase power meter based on Ethernet is designed and researched. Single-chip processor MC9S12NE64 is used as system's CPU and in charge of the system control and information processing. Power measurement chip CS5460A is applied to calculate electrical parameters. EMAC and EPHY modules which are MC9S12NE64's inter parts are adopted to accomplish Ethernet communication, and how to design Ethernet protocol and data processing are illuminated in detail. The system has realized real-time settlement of electric charge and other network-controlled functions such as power stoppage and supply. It overcomes current problems about electric charge's disagreement due to offline running of power meter. The power meter is mainly used in the environment where Internet network has been realized, and it is unnecessary to establish wired communication network in addition. Resources of network sharing can be achieved and cost can be saved greatly. Keywords: Ethernet; single-phase power meter; single-chip processor; communication protocols, power measurement.