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Design of a high-precision energy meter according to the Measuring Instruments Directive
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Design av en högprecisionsenergimätare enligt Mätinstrumentdirektiven (Swedish)
Abstract [en]

This thesis investigates how an energy meter should be constructed in order to apply to the Measurement Instrument Directive. The measuring instrument directive is a statutory industry standard. All meters used for billing purposes must abide by this standard. Multiple systems were investigated in order to find the optimal system according to the agreed upon demands. Each system is presented individually and need to be able to withstand 230V and 35A. The system which fulfills the demands the best is implemented. The choosen system is based around the M90E32AS and Atmega328pb IC:s from Microchip. The sensors used are current transformers and voltage dividers. The M90E32AS samples data from the sensors and forwards it to the Atmega328pb where they can be read by a computer. Communication is conducted via SPI (Serial Peripheral Interface). Isolation is needed to provide protection to low voltage components and other equipment. Because of this the transformers and optocouplers are used. The end result is a functioning energy meter. It measures voltage and current in a satisfying way with a very small margin om error. According to the test made regarding energymetering the measurement error is just above 1%. This is a bigger error than what was wanted but the tests are not very precise and the error is probably smaller in reality.

Place, publisher, year, edition, pages
2018. , p. 99
Keywords [en]
energimätare, analog design, trefas, effektelektronik
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-150148ISRN: LiU-ITN-TEK-A--18/014--SEOAI: oai:DiVA.org:liu-150148DiVA, id: diva2:1238584
Subject / course
Electrical Engineering
Uppsok
Technology
Supervisors
Examiners
Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2018-08-14Bibliographically approved

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Design of a high-precision energy meter according to the Measuring Instruments Directive(3970 kB)130 downloads
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CiteExportLink to record
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Citation style
  • apa
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Output format
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