Experience and Challenges With Short-Term Balancing in European Systems With Large Share of Wind Power

Söder, Lennart; Abildgaard, Hans; Estanqueiro, Ana; Hamon, Camille; Holttinen, Hannele; Lannoye, Eamonn; Gómez‐Lázaro, Emilio; O’Malley, Mark; Zimmermann, Uwe

doi:10.1109/tste.2012.2208483

Cited by 47 publications

(24 citation statements)

References 6 publications

(6 reference statements)

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“…Ireland is a small and isolated electricity system, with a minor amount of interconnection compared to other European states [2]. The interconnection that does exist is HVDC only, with no synchronised AC interconnection.…”

Section: Nomenclaturementioning

confidence: 99%

Demand Side Management of public clean water supply

Kernan

Liu

McLoone

et al. 2015

2015 50th International Universities Power Engineering Conference (UPEC)

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Section: Nomenclaturementioning

confidence: 99%

Demand Side Management of public clean water supply

Kernan

Liu

McLoone

et al. 2015

2015 50th International Universities Power Engineering Conference (UPEC)

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“…Therefore, the operating range (from minimum to maximum power) is limited by the manufacturers in order to avoid damage. Years ago, turbines used to operate around the best efficiency point but nowadays power plant operators are very interested in increasing the regulation capacity, because this is translated into a large increase in revenues [1] even though the lifetime of the machine is reduced.…”

Section: Introductionmentioning

confidence: 99%

Extension of Operating Range in Pump-Turbines. Influence of Head and Load

Valero

Egusquiza

et al. 2017

Energies

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Due to the increasing share of new renewable energies like wind and solar in the generation of electricity the need for power regulation and energy storage is becoming of paramount importance. One of the systems to store huge amounts of energy is pumped storage using reversible hydropower units. The machines used in these power plants are pump-turbines, which can operate as a pump and as a turbine. The surplus of electrical energy during low consumption hours can be converted into potential hydraulic energy by pumping water to a higher level. The stored energy can be converted into electricity again by operating the runner as a turbine. Due to new regulation requirements machines have to extend the operating range in order to match energy generation with consumption for the grid stability. In this paper the consequences of extending the operating range in existing pump-turbines have been studied. For that purpose, the data obtained after two years of condition monitoring were analyzed. Vibrations and pressure fluctuations of two pump-turbines of 85 MW each have been studied during pump and turbine operation. For turbine operation the effects of extending the operating range from the standard range of 45-85 MW to and increased range of 20-85 MW were analyzed. The change in vibration levels and signatures at very low load are presented with the identification of the phenomena that occur under these conditions. The influence of head in the vibration behavior is also presented. The appearance of fluid instabilities generated at part load that may produce power swing is also presented. Finally, the effect of head on the vibration levels for pump operation is shown and analyzed.

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“…In the outcome of these studies, a significant share of the electricity production in 2050 comes from renewables, ranging between 40% and 100%. Their variable output and limited predictability result in a need for back-up generation capacity and balancing services [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Quantifying the flexibility of residential electricity demand in 2050: a bottom-up approach

Stiphout

Engels

Guldentops

2015

2015 IEEE Eindhoven PowerTech

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This work presents a new method to quantify the flexibility of automatic demand response, combined with real time pricing, applied to residential electricity demand using price elasticities. A stochastic bottom-up model of flexible electricity demand in 2050 is presented. Three types of flexible devices are implemented: electric heating, electric vehicles and wet appliances. Each house schedules its flexible demand w.r.t. a varying price signal, in order to minimize its electricity cost. Own-and cross-price elasticities are obtained through a regression analysis. Via a Monte Carlo approach-based method, the elasticities are scaled up to a country level. The results show that the electric energy demand will double and that, when combining automatic demand response with real time pricing, power peaks in demand could be incurred that are 5 to 8 times greater than today. The elasticity matrices show that for Belgium most flexibility is available in winter and least in summer.

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Experience and Challenges With Short-Term Balancing in European Systems With Large Share of Wind Power

Cited by 47 publications

References 6 publications

Demand Side Management of public clean water supply

Demand Side Management of public clean water supply

Extension of Operating Range in Pump-Turbines. Influence of Head and Load

Quantifying the flexibility of residential electricity demand in 2050: a bottom-up approach

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