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Strömbegränsare i synkrongeneratorer: En studie av strömbegränsarmodeller i PSS/E
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 thesis
Abstract [en]

It is well known that a crucial factor determining the transmission capacity with regards to the voltage stability limit of a stressed power system, is the limitation of field and stator current of overexcited generators. These limiters are commonly referred to as overexcitation limiters (OEL) and stator current limiters (SCL). This thesis investigates the representation of overexcitation limiters and stator current limiters in the Swedish power system and how they could be implemented in the power system simulator PSS/E. Dynamic simulations in PSS/E are performed to investigate and validate differences between model types and parameters. The thesis compares different types of limiters and presents a representative set of parameters based on the documentation and implements them into PSS/E. The result from the study is a recommendation to migrate to limiter model MAXEX2 for generators without stator current limiters. The MAXEX2 model uses an inverse time characteristic which is becoming more common in installed voltage regulators. This feature makes it possible for extended use of generators before limiter action is applied. The MAXEX2 model is also possible to tune into a fixed time delay to represent older types of limiters.

Place, publisher, year, edition, pages
2016. , 69 p.
UPTEC ES, ISSN 1650-8300 ; 16006
Keyword [en]
Power systems, overexcitation limiter, stator current limiter, dynamic simulation, PSS/E, automatic voltage regulator
Keyword [sv]
Kraftsystem, fältströmbegränsare, statorströmbegränsare, strömbegränsare, PSS/E, spänningsreglering, dynamisk simulering
National Category
Energy Systems
URN: urn:nbn:se:uu:diva-282507OAI: diva2:917119
External cooperation
Svenska kraftnät
Educational program
Master Programme in Energy Systems Engineering
Available from: 2016-04-06 Created: 2016-04-05 Last updated: 2016-04-06Bibliographically approved

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