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Integrating vanadium redox flow batteries with large-scale wind power
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Vanadium redox flow batteries have, in previous studies, shown to have great potential for large-scale energy storage applications. Due to their beneficial characteristics, such as long lifetime, safety and flexible sizing the technology could be used for several different applications. In this study, the economic and technological feasibility of integrating a vanadium redox flow battery with a 100 MW wind farm is assessed. Different applications and operating schedules were tested. Simulating models have been built using conditional statements or linear optimisation and solved in MATLAB. Results suggested that a model which stacked power levelling with frequency regulation had the highest profitability. For this model the payback time was shown to be 10 years and the net present value was around 1.2 M€ for a 5 MW/10 MWh battery. However, the battery had around 820 annual charge/discharge cycles, which could be a limiting factor of the battery’s lifetime. A sustainability assessment was carried out which concluded that the battery can be seen as sustainable, given that the battery is manufactured and operated under safe conditions.

Abstract [sv]

Vanadin redox-flödesbatterier har visat stor potential för storskaliga energilagringsapplikationer i tidigare studier. På grund av deras fördelaktiga egenskaper, såsom lång livstid, säkerhet och skalningsflexibilitet har teknologin många användningsområden. I denna studie utreds den ekonomiska och teknologiska möjligheten att integrera ett vanadium redox-flödesbatteri med en 100 MW vindpark. Olika applikationer och driftsstrategier testades. Simuleringsmodeller har byggts där linjäroptimering eller villkorssatser har tillämpats och dessa har lösts i MATLAB. Den mest ekonomiskt gynnsamma modellen var en modell där kraftbalansering och primär frekvensreglering kombinerades. Denna modell visade en återbetalningstid på 10 år och ett nuvärde på 1.2 M€ för en batteristorlek på 5 MW/10 MWh. Däremot hade batteriet 820 laddning/urladdnings cykler på år, vilket kan vara en begränsade faktorn för batteriets livstid. En hållbarhetsbedömning gjordes där slutsatsen kunde dras att batteriet kan anses hållbart, förutsatt att batteritillverkningen och driften görs under säkra förutsättningar.

Place, publisher, year, edition, pages
2018. , p. 84
Series
TRITA-ITM-EX ; 2018:147
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-232542OAI: oai:DiVA.org:kth-232542DiVA, id: diva2:1235319
External cooperation
ÅF - Renewables and Energy Strategy
Supervisors
Examiners
Available from: 2018-07-25 Created: 2018-07-25 Last updated: 2018-07-25Bibliographically approved

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CiteExportLink to record
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