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The Design and Implementation of Carrier Energy Meter Base on ATT7028A

Author: ShengHaiBo
Tutor: ZhuQing
School: Hunan University
Course: Electronic Science and Technology
Keywords: Carrier Meter Spread Spectrum Communication ATT7028A Electromagnetic Compatibility
CLC: TM933.4
Type: Master's thesis
Year: 2010
Downloads: 117
Quote: 4
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Abstract


With carrier communication technology and computer technology, as well as national power grids and smart grid proposed as measurement terminal carrier power meter applications more widely, it is not only solve the artificial home electric energy meter reading data trouble, but also for Real-time monitoring of the electricity sector electricity consumption electricity users to provide the channel. Aiming at the power meter market trends and customer needs, the design of a high-precision power meter, this meter to achieve through the power line carrier communication. This paper first introduces the research background and significance, outlines the development trend of the carrier energy meter and paper mainly organizational structure, and then the carrier energy meter electric energy measurement and metering of the basic principle is analyzed on the power line carrier communication communications and spread spectrum communication are introduced. Then this paper conducted a carrier energy meter hardware design and software design. Hardware design, first proposed the carrier energy meter overall design scheme, in accordance with sub-meter four-part structure has been designed for energy meter, including the power supply and measurement board, logic board, display board and carrier communication board, focusing on the power metering and metering plate portion and a carrier communication board hardware design. Through the various functional board circuit analysis and design, implementation of the national grid and the customer carrier meter functional requirements in all aspects of the hardware implementation. Hardware design, selection of key components are: selection of high-precision measurement chip measurement ATT7028A; logic board CPU use NEC's 78K0/KD2 series microprocessor; carrier communication chips use spread spectrum communication chips PLCi36. Finally, summarize the carrier from the mass obtained meter core component of the system of quartz crystal resonators selection method. In the energy meter software design gives the first modular design and software design flow chart of the overall design, the focus of the measurement part of the calibration process, electrical energy accumulation calculations, parameter setting and software features to achieve carrier communication. Finally, the paper carrier meter tested and gives the experimental analysis, in which part of the performance test accuracy and impact of the amount of test and the test data were analyzed and summarized. Electromagnetic compatibility (EMC) test, first a brief introduction to EMC, EMC tests conducted focus of burst test, electrostatic discharge test, high voltage batons, such as testing, analysis of the phenomenon during the test and test data, and summarizes the carrier energy meter PCB layout in some of the experiences of EMC. The research and design of the carrier energy meter accuracy class 0.5S class, using the software calibration. Through testing and linked network run, to meet the national grid of the carrier energy meter functional specification, the same time meet the customer's specific requirements. As a result of the latest DL / T 645-2007 Statute, the grid can accommodate future upgrades to meet future electricity meter market development needs.

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CLC: > Industrial Technology > Electrotechnical > Electrical measurement techniques and instruments > Power the number of measurements and instrumentation > Power measurement,power meter
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