A power market-based operation support model for sub-daily hydropower regulation practices

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Torabi Haghighi, A.Water, Energy and Environmental Engineering Research Unit, University of Oulu, PO Box 4300, 90014, Finland (author)

A power market-based operation support model for sub-daily hydropower regulation practices

Article/chapterEnglish2019

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Elsevier Ltd,2019
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LIBRIS-ID:oai:DiVA.org:kth-263474
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263474URI
https://doi.org/10.1016/j.apenergy.2019.113905DOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

Notes

QC 20191206
With increasing power production from renewable energy sources, sub-daily variations in energy demand need to be balanced. Today, hydropower is commonly used as balancing power. In this study, we quantified the impact of capacity constraints, in terms of reservoir volume and hydropower capacity, on the potential to comply with instant energy demand. To evaluate the impact, we developed two new metrics, power market impact and system efficiency ratio, which are based on two threshold flow regimes derived from natural flow as lower threshold release and regulated flow (based on hourly energy prices) as upper threshold release. The operation support model comprises 96 different regulation scenarios based on varying combinations of hydropower and reservoir capacities. For each scenario, an hourly water balance was simulated, to obtain the highest complying with upper threshold release based on actual energy demand. We tested the framework on the Kemijoki river with defined thresholds based on the natural flow regime (tributary river Ounasjoki) and the hourly energy price in Finland in 2017, and estimated the impact of regulation on hourly flow regime at the Taivalkoski hydropower station. The annual flow regime impact in 2013, 2014 and 2015 was estimated to be 74%, 84% and 61%, respectively, while the monthly impact varied from 27% to 100%. Our framework for evaluating interactions between the power market and sub-daily regulation practices is a useful novel tool for sustainable river management and can be easily applied to different rivers and regions and evaluated for different timescales.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Vattenteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Water Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Infrastrukturteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Infrastructure Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Naturresursteknik Energisystem hsv//swe
ENGINEERING AND TECHNOLOGY Environmental Engineering Energy Systems hsv//eng
Flow regime alteration
Hydropeaking
Power market
Renewable energy
River regulation
Sub-daily variation
Commerce
Energy management
Hydroelectric power
Reservoirs (water)
Rivers
Daily variations
Flow regimes
Renewable energies
Power markets
alternative energy
demand analysis
energy market
flow regulation
hydrological regime
power generation
regulatory framework
river management
threshold
water budget
Finland
Kemijoki River
Lappi [Finland]
Land and Water Resources Engineering
Mark- och vattenteknik

Added entries (persons, corporate bodies, meetings, titles ...)

Ashraf, F. B.Water, Energy and Environmental Engineering Research Unit, University of Oulu, PO Box 4300, 90014, Finland (author)
Riml, Joakim,1979-KTH,Resurser, energi och infrastruktur(Swepub:kth)u1265deb (author)
Koskela, J.Finnish Environment Institute (SYKE), Latokartanonkaari 11, Helsinki 00790, Finland (author)
Kløve, B.Water, Energy and Environmental Engineering Research Unit, University of Oulu, PO Box 4300, 90014, Finland (author)
Marttila, H.Water, Energy and Environmental Engineering Research Unit, University of Oulu, PO Box 4300, 90014, Finland (author)
Water, Energy and Environmental Engineering Research Unit, University of Oulu, PO Box 4300, 90014, FinlandResurser, energi och infrastruktur (creator_code:org_t)

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In:Applied Energy: Elsevier Ltd2550306-26191872-9118

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