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Batterier i elnätet: Analys för användning vid driftstörning
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2018 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Batteries in the electric grid : Analysis for usabilty during power outages (English)
Abstract [en]

The energy consumption in Sweden has risen remarkably over the last 40 years and the society is more and more dependent on electricity to maintain socially important functions. Authorities, grid-owners and consumers are increasing their demands for a more secure energy delivery.

Skellefteå Kraft is doing continuous investments in this area and its focus is to get the electric grid durable and weather resistant. It is, however, not possible to this is within the same year due to technical- and economic reasons which is why there ́s a need for an effective preventive maintenance solution.

Batteries have seen a huge breakthrough thanks to the electric car and increasing demand to store renewable energy. Hopefully batteries are powerful enough to be a viable solution as backup power when a power failure occurs which is what this project have been investigating.

This project consists of a literature study regarding the current battery technology that ́s in use today but also the future technologies that are under development and expects to be commercially available within the next 15 years.

The project has also done a theoretical set-up to see if today ́s batteries are capable of providing enough power to a normal size house over at least 12 hours while they also are light enough to transport by one or two technicians. This set-up includes two different inverters and four battery alternatives that are compared to each other.

The results show that it ́s theoretically possible to use smaller batteries to provide enough power when connected to each other to form a battery bank. It does however require between 20 to 32 batteries to reach enough capacity which also results in weights up to 700 kg and costs up to 500 000 SEK in total.

Luckily experts ́ analysis and prognostics are positive and a potential investment in five years might be reasonable. A comparable battery bank in five years might cost 70 % less based on price reductions the past five years and new technology might even reduce weight and costs by 80 % in less than 15 years. If one wants to be prepared for a future investment a future project or degree project would be to do a small-scale prototype to evaluate the batteries real performance in the field.

Place, publisher, year, edition, pages
2018.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-69695OAI: oai:DiVA.org:ltu-69695DiVA, id: diva2:1221319
External cooperation
Skellefteå Kraft AB
Subject / course
Student thesis, at least 15 credits
Educational program
Energy Engineering, bachelor's level
Examiners
Available from: 2018-06-20 Created: 2018-06-19 Last updated: 2018-06-20Bibliographically approved

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