The Design And Realization Of Three-phase Smart Meters Based On IEC62056Protocol

The terminal part of smart grid is watt-hour meters, which is the key to realizedata exchange, timely and accurate billing function and intelligent scheduling. Withthe development of smart grid, it has put forward higher requirements on watt-hourmeters. At present, most of the watt-hour meters are based on DL/T645standard, Inthe context of continued development of watt-hour meter technology,the applicationshows that DL/T645has a lot of limitations and become increasingly unsuited to therapid development of smart meters. IEC62056standard protocols, the best watt-hourmeter communication standard by far, can have good interconnectivity andinteroperability. Developing smart meters based on IEC62056Protocol can not onlyimprove the competitiveness of watt-hour meters in the international market, butalso has a certain promotion significance in regulating the domestic energy metermarket.Firstly, the development of watt-hour meters and significance of the study willbe talked about. And a smart meter design idea based on IEC62056Protocolcombining SCM and special metering IC hardware, is proposed by comparison andverification. This design has a very high Cost-effevtive. Then, a detailed analysisand introduction of the hardware circuit and software functional module of thewatt-hour meter will be given. Finally, the performance test, accuracy test,functional test and DLMS/COSEM conformity of some prototypes test are done todemonstrate that the meter meets all specifications, and some test methods and partof results are shown.This article mainly focuses on the design and implementation of softwarefunctionality, by designing task scheduling and message-handling mechanism basedon single chip microcomputer to make the smart meter become a softwaredevelopment platform based on IEC62056. On the basis of this platform, we canquickly and easily upgrade the products and do a secondary development which issignificant to reduce software duplicate development effort and fast responsing tothe market needs. Also a remote upgrade function, which is very rare in theapplication of watt-hour meters is designed. The products, which has been invited tobe sent to Singapore, Indonesia, Saudi Arabia for functionality and performanceassessment, has a good performance.