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Utveckling av koncept för att reglera reaktiv effekt vid generatordrift via PLC: Framtagande och provning av prototyp
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
2019 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Development of concepts for regulating reactive power during generator operation via PLC : Creation and testing of prototype (English)
Abstract [sv]

I projektet utreds möjligheterna kring att kunna kontrollera en generators reaktiva effektproduktion genom att styra magnetiseringsströmmen från en PLC. Som metod för styrning från PLC beslutades att en signal på 0-5V skulle användas. För att reglera magnetiseringen, och därmed i förlängningen den reaktiva effekten, beslutades att den befintliga manuella potentiometern skulle ersättas med två parallellkopplade digitala potentiometrar av typen MCP4261 som kontrollerades av en mikrokontroller. Att de digitala potentiometrarna skulle parallellkopplas beslutades efter en förstudie som visade på att det skulle resultera i en noggrannare reglering utan någon inskränkning på användbart reglerspann. Praktisk provning av mikrokontroller och digitala potentiometrar gav ett tillfredsställande och bra resultat med god upplösning.

Abstract [en]

This project investigates the possibilities of being able to control a generators reactive power production by controlling the excitation current from a PLC. As a method for controlling from PLC, it was decided that a signal of 0-5V should be used. In order to regulate the magnetization, and hence in the long term the reactive power, it was decided that the existing manual potentiometer would be replaced by two parallel-connected digital potentiometers of the type MCP4261 controlled by a microcontroller. The fact that the digital potentiometers would be connected in parallel was decided after a feasibility study which showed that in this way it would result in a more accurate regulation without any restriction on the usable control span. Practical testing of microcontrollers and digital potentiometers provided a satisfactory result with a good resolution.

Place, publisher, year, edition, pages
2019. , p. 21
Keywords [en]
reactive effect, reactance, reactivity, capacitance, capacitivity, inductance, inductivity, generator, phase compensation, microprocessor, PLC, arduino, potentiometer
Keywords [sv]
reaktiv effekt, reaktans, reaktivitet, kapacitans, kapacitivitet, induktans, induktivitet, generator, faskompensering, mikroprocessor, PLC, arduino, potentiometer
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-83408OAI: oai:DiVA.org:lnu-83408DiVA, id: diva2:1318232
Educational program
Marine Engineering Programme (4 years) with onboard practical training placement, 180 credits
Presentation
2019-05-15, 13:10
Supervisors
Examiners
Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Output format
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