GAO Xiong, SHI Zhe, PENG Yong gang, WEI Wei

(College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, China)

Abstract: Aiming at the problems of bidirectional energy independent measurement, power quality parameter monitoring, distributed power control, power subsidies billing casing by a lot of distributed power access to the smart grid, a review was given on bidirectional energy independent measurement, AMI system, harmonic measurement, communication protocol, energy efficiency management and so on, analyzing the function requirements of smart bidirectional measurement and monitoring terminal, by referencing smart meter design solutions, designed a smart bidirectional measurement and monitoring terminal which is based on "STM32F207 microcontroller + metering chip” and a variety of communication interfaces. Using FreeRTOS operating system as platform, designed the overall mission, bidirectional energy measurement task, power quality monitoring mission, energy efficiency management tasks, data storage and control tasks flowchart, and used calibration equipment and other related equipment to test its functions. The results indicate that the terminal energy metering meets the accurate requirements, and can achieve real time gathering power grid quality, bidirectional communication, bidirectional energy metering and billing and other functions. The system is stable and reliable.

Key words: bidirectional metering; STM32F207; FreeRTOS; advanced metering infrastructure