基于IR46标准的新型智能双芯电表设计

摘要

针对国际法制计量组织新制定的International Recommendation 46《有功电能表》标准要求,设计了一款智能双芯电表.智能双芯电表采用计量芯片和管理芯片独立运行,两个芯片互相隔离,通过串行外设接口(SPI)通信进行数据交互.该设计使得电表计量功能和其他功能相互独立,既能够满足智能电网要求,又可满足IR46所提出的标准.着重介绍了软件升级的实现方法,同时探讨了电能表的误差来源,并在计量芯上用软件实现了三点校表法,提高了电表计量精度.经过校准后,该电表可使电能表精度在千分之一以内.所设计的智能双芯电表实现了一代国网表使用中提出的新需求,兼容和支持各种通信资源,是一款功能完备的新型智能电表.智能双芯电表是未来电表的发展趋势,必将成为智能电表方向的主流产品.%In accordance with the International Recommendation 46 "Active Energy Meter" standard which is newly developed by organization international metrologie legale,a smart dual core electric energy meter has been designed.In this meter,the metering chip and the management chip run independently and these two chips are isolated from each other,there is only one way of SPI communication for data exchange.So,the design makes metering functionand other functions of the meter independent to each other, which meets the requirement of the smart grid and the standard of IR46. The implementation method of software upgrade is introduced emphatically,the sources of error of the electric energy meter is investigated.The meteringchip achieves three-point calibration method by using certain software,and the accuracy of the energy meter can be improved to 0.1% after calibration.This smart dual Smart dual core electric energy meter achieves the expectation of the new requirements of State Grid,the compatibility and the capability of supporting a variety of communication resources,it is a new smart meter with comprehensive functions.Smart dual coremeter is the development trend of the energy meter in the future;it will become the mainstream product in the field of smart meters.