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Analysis and Reporting of the control tests conducted in connection withcommissioning for control systemupgrade at Ringhals 2.
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering.
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

This master thesis project was carried out at Ringhals AB Unit 2. It is focused on modeling and introducing a new control strategy for control loop 21414V141/131 which is a condensate water system. Existing control strategy of the selected control loop is simple feedback control system with one PID controller. Results of current control strategy were taken into account for improvements in terms o f system stability, valve movements and unwanted transients. Problems found in selected loop were; large variations in process variable, extra movement in valve positions and inefficient opening of valves.Simulation model with similar control strategy and results as of real power plant was createdand validated, as new control strategy can be applied and results can be compared. The main recommendation to improve the control system performance was found through cascade control strategy that could assist the current controller. The recommendation was evaluated by designing and implementing the cascade control strategy on the Dymola simulation model. Simulation results pointed out considerable increase in system performanceaccording to the requirements of Vattenfall AB.

Place, publisher, year, edition, pages
2013. , 75 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kau:diva-31759OAI: oai:DiVA.org:kau-31759DiVA: diva2:707462
External cooperation
Vattenfall AB Sweden
Subject / course
Electrical Engineering
Educational program
Master of Science in Engineering, Degree Programme in Engineering Physics (120 ECTS credits)
Presentation
2013-03-05, Karlstad University Sweden, Karlstad, 14:00 (English)
Supervisors
Examiners
Available from: 2014-03-25 Created: 2014-03-24 Last updated: 2014-03-25Bibliographically approved

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Master Thesis(2137 kB)549 downloads
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CiteExportLink to record
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Output format
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