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Analys av stationsreglering vid Forsmarks kärnkraftverk: koppling mot eldynamiska simuleringsverktyg och modeller
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2016 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Analysis of Plant Controller at Forsmark Nuclear Power Plant (English)
Abstract [en]

This master thesis is done within the Energy Systems Engineering program at Uppsala University and performed for Forsmarks Kraftgrupp, Vattenfall. The nuclear power plant at Forsmark consists of three BWR units and is an important component in the Swedish power system. The nuclear power units are individually connected to the 400 kV transmission grid to export their production, but also to supply the units with auxiliary power when needed. As a backup the units are also connected to the 70 kV grid and each have several sub grids supported by backup diesel engines and batteries.This is to guarantee that the nuclear power units always have electrical power to support their vital auxiliary systems.

To evaluate the function of the separate local power grids of Forsmark’s nuclear units and their interaction with the offsite grid, the simulation software Simpow have been used. With Simpow, the function of controllers, pumps and motors, vital for the plants safety, can be analyzed for different operation conditions and plant changes. Today the Electrical Power Analysis and Plant Engineering Group are in the process of changing from Simpow to new simulation software, PowerFactory. During this process the question of how to best implement the plant controller have been raised. The plant controller controls the thermal power, pressure and water level of the reactor, all contributing to the dynamics of the units power supply during operation. An implementation of the plant controller exist in Simpow for the plant’s older units Forsmark 1 and 2, but for the newest unit Forsmark 3 there is only a standard model of a steam turbine with governor implemented.

In this thesis the effect of the plant controller systems are investigated to serve as a basis for implementation of the plants dynamics in the modelling of Forsmark 3 in PowerFactory.

Place, publisher, year, edition, pages
2016. , 36 p.
UPTEC ES, ISSN 1650-8300 ; 16011
Keyword [sv]
stationsreglering, kärnkraft, Forsmark, dynamik, störning, reglering
National Category
Energy Engineering Engineering and Technology
URN: urn:nbn:se:uu:diva-295633OAI: oai:DiVA.org:uu-295633DiVA: diva2:934404
External cooperation
Forsmarks Kraftgrupp AB
Educational program
Master Programme in Energy Systems Engineering
Available from: 2016-06-09 Created: 2016-06-08 Last updated: 2016-06-09Bibliographically approved

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