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Tillämpning av effektstabilisering i PLC
Karlstad University, Faculty of Technology and Science.
Karlstad University, Faculty of Technology and Science.
2008 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Syftet med examensarbetet är att digitalt tillämpa en stabilisering av pendlingar i den aktiva effekten hos en synkrongenerator för vattenkraft kopplad till ett distributionsnät.

Implementeringen är tänkt att ske i en PLC som redan hanterar andra delar av magnetiseringen.

Effektstabiliseringen görs genom att en motverkande styrsignal skickas till magnetiseringsutrustningen vilken i sin tur påverkar generatorns uteffekt. Denna motverkande styrsignal kan tas fram på olika sätt.

Två modeller, av IEEE standardiserade, för effektstabilisering undersöks, PSS1A och PSS2B.

En Simulink-modell över ett distributionsnät med generator byggs upp för att testa effektstabiliseringen.

Diskretisering av den ena standarden utförs för att digital implementering ska kunna ske. Tester utförs även på denna modell för att kunna validera dess funktion i jämförelse med den kontinuerliga.

Den tidsdiskreta modellen görs om till ett matematiskt uttryck tillämpbart i PLC:n.

Jämförelse sker mellan simuleringarna och den tillämpade modellen genom mätningar.

Abstract [en]

The purpose of the degree project is to make a digital realization of a stabilizer for oscillations in the active power from a hydropower synchronous generator, connected to a power network.

The implementation is supposed to be done in a PLC which already handles part of the excitation system.

The power stabilization is achieved by sending a counteracting reference signal to the excitation system which controls the generator’s output power. This counteracting signal can be achieved in several ways.

Two existing models, standardized by IEEE, for power system stabilizing will be examined, PSS1A and PSS2B.

A Simulink-model of a distribution net with a generator is constructed to test the stabilizers.

To perform a digital implementation a discrete transformation of one continuous model is done. This discrete model is also tested to verify the function in comparison to the continuous one.

The discrete model is reorganized in a form possible to implement in the PLC.

Comparison between the simulated and the implemented model is made by measurement.

Place, publisher, year, edition, pages
2008. , p. 31
Keywords [en]
Power System Stabilizer
Keywords [sv]
Effektstabilisering, PLC, Synkrongenerator
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kau:diva-1717Local ID: ELI-21OAI: oai:DiVA.org:kau-1717DiVA, id: diva2:5695
Subject / course
Electronic Engineering, Bachelor of Science
Presentation
2008-06-04, 10:30
Uppsok
Technology
Supervisors
Examiners
Available from: 2008-07-10 Created: 2008-07-10 Last updated: 2016-04-08

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CiteExportLink to record
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  • apa
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