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Ancillary Services Potential For Flexible Combined Cycles
Univ Genoa, Mech Engn, I-16145 Genoa, Italy..
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-7804-667X
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2021 (English)In: Proceedings of the ASME Turbo Expo, American Society of Mechanical Engineers (ASME) , 2021, USA, 2021Conference paper, Published paper (Refereed)
Abstract [en]

Combined Cycle Gas Turbines, CCGTs, are oftenconsidered as the bridging technology to a decarbonized energysystem thanks to their high exploitation rate of the fuel energeticpotential. At present time in most European countries, however,revenues from the electricity market on their own are insufficientto operate existing CCGTs profitably, also discouraging newinvestments and compromising the future of the technology. Inaddition to their high efficiency, CCGTs offer ancillary servicesin support of the operation of the grid such as spinning reserveand frequency control, thus any potential risk of plantdecommissioning or reduced investments could translate into arisk for the well-functioning of the network. To ensure thereliability of the electricity system in a transition towards ahigher share of renewables, the economic sustainability ofCCGTs must be preserved, for which it becomes relevant tomonetize properly the ancillary services provided. In this paper,an accurate statistical analysis was performed on the day-ahead,intra-day, ancillary service, and balancing markets for the wholeItalian power-oriented CCGT fleet. The profitability of 45 realproduction units, spread among 6 market zones, was assessed onan hourly basis considering local temperature, specific plantlayouts, and off-design performance. The assessment revealedthat net income from the ancillary service market doubled, onaverage, the one from the day-ahead energy market. It wasobserved that to be competitive in the ancillary services marketCCGTs are required to be more flexible in terms of ramp rates,minimum environmental loads, and partial load efficiencies.This paper explores how integrating a Heat Pump and a ThermalEnergy Storage within a CCGT could allow improving itscompetitiveness in the ancillary services market, and thus itsprofitability, by means of implementing a model of optimaldispatch operating on the ancillary services market

Place, publisher, year, edition, pages
USA, 2021.
Keywords [en]
Gas Turbine, Flexibilization, Ancillary Services, Heat Pump, Modelling, Combined Cycle
National Category
Energy Systems
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-303967DOI: 10.1115/gt2021-59587Scopus ID: 2-s2.0-85115441796OAI: oai:DiVA.org:kth-303967DiVA, id: diva2:1605316
Conference
ASME Turbo Expo 2021
Note

QC 20211221

Available from: 2021-10-22 Created: 2021-10-22 Last updated: 2022-09-13Bibliographically approved

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García, JoséMantilla, WeimarGuédez, Rafael

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Citation style
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