Searched for: subject%3A%22Ancillary%255C+services%22
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Wu, Dan (author), Seo, Gab-Su (author), Xu, Lie (author), Su, Chi (author), Kocewiak, Łukasz (author), Qin, Z. (author)
Offshore wind is expected to be a major player in the global efforts toward decarbonization, leading to exceptional changes in modern power systems. Understanding the impacts and capabilities of the relatively new and uniquely positioned assets in grids with high integration levels of inverter-based resources, however, is lacking, raising...
journal article 2024
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Malamaki, Kyriaki-Nefeli D. (author), Fu, A. (author), Mauricio, Juan Manuel (author), Cvetkovic, M. (author), Demoulias, Charis S. (author)
As the penetration of Converter-Interfaced Dis-tributed Renewable Energy Sources (CI-DRES) increases, several problems are revealed in electric power systems, e.g., power quality issues, reverse power flows and frequency instability. A solution to tackle these issues is the mitigation of high CI-DRES active power ramp-rates (RRs) by utilizing...
conference paper 2023
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Damianakis, Nikolaos (author), Yu, Y. (author), Bauer, P. (author)
Smart-Charging of Electric Vehicles (EVs) is able to provide frequency regulation capacity services to the System Operator (SO) upon an automation generation control (AGC) signal. While the amount of available regulation capacity is of-fered in the Day-Ahead Market (DAM), there is high uncertainty on the actual amount of reserves that will be...
conference paper 2023
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van Lonkhuyzen, Joost (author)
Ambitious decarbonization targets are introduced to combat climate change. According to the European Commission, sector coupling is required to achieve these targets. This includes the inclusion of renewables into sectors that are difficult to decarbonize, but also using resources more efficient, and introducing new clean fuels. Recent research...
master thesis 2022
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Evans, Michael (author), Tindemans, Simon H. (author), Angeli, David (author)
This paper proposes a framework for the procurement of flexibility reserve from aggregated storage fleets. It allows for arbitrary tree structures of aggregation hierarchy, as well as easily implementable disaggregation via broadcast dispatch. By coupling discharge and recovery modes, the proposed framework enables full-cycle capacity to be...
journal article 2022
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Alpizar Castillo, J.J. (author), Ramirez Elizondo, L.M. (author), Bauer, P. (author)
Renewable energy power plants and transport and heating electrification projects are being deployed to enable the replacement of fossil fuels as the primary energy source. This transition encourages distributed generation but makes the grid more weather-dependent, thus reducing its inertia. Simultaneously, electrical network operators face...
journal article 2022
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Otte, Marcel (author)
In order to decrease carbon emissions of the transport sector, the roll-out of plug-in electric vehicles (PEV) aims a replacement of conventional combustion-based vehicles. Their intended power system integration goes along with increasing the share of renewable energies. Hereby, PEV have the prerequisites for intelligent charging to support...
master thesis 2021
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Damianakis, Nikos (author)
With the current urge around the globe for switching to “green energy” and Renewable Energy Sources (RES) utilization, the electrification of the transportation sector has become a necessity. While the emerging Electric Vehicles (EVs) can provide several benefits to the power grid, such as voltage and frequency regulation and power quality...
master thesis 2021
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Poplavskaya, K. (author)
Balancing and redispatch are essential services for the security and stability of the electricity network. Balancing refers to continuously maintaining a balance between supply and demand through activating flexible resources. Redispatch refers to changing the dispatch of generators to remedy network congestion. The need for flexibility...
doctoral thesis 2021
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Marshall, Jack (author)
In order to decarbonize the electricity grid, renewable energy sources must be utilised in con- junction with energy storage to provide ancillary services, which maintain electricity supply quality, reliability and restorability, whilst remaining aordable. Due to a lack of knowledge about the potential of stacking UK ancillary services and...
master thesis 2021
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Evans, Michael (author), Tindemans, Simon H. (author)
This paper presents a framework for deriving the storage capacity that an electricity system requires in order to satisfy a chosen risk appetite. The framework takes as inputs user-defined event categories, parameterised by peak power-not-served, acceptable number of events per year and permitted probability of exceeding these constraints, and...
conference paper 2020
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Oureilidis, Konstantinos (author), Malamaki, Kyriaki-Nefeli (author), Gkavanoudis, Spyros (author), Cvetkovic, M. (author), Mauricio, Juan Manuel (author), Maza Ortega, Jose Maria (author), Martinez Ramos, Jose Luis (author), Papaioannou, George (author), Demoulias, Charis (author)
The high proliferation of converter-dominated Distributed Renewable Energy Sources (DRESs) at the distribution grid level has gradually replaced the conventional synchronous generators (SGs) of the transmission system, resulting in emerging stability and security challenges. The inherent characteristics of the SGs are currently used for...
review 2020
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Poplavskaya, K. (author), Joos, Marine (author), Krakowski, Vincent (author), Knorr, Kaspar (author), De Vries, Laurens (author)
The authors provide a critical analysis of existing approaches to balancing and congestion management (specifically redispatch) and their effects on the incentives for service providers. This issue is particularly important in the view of the harmonization of ancillary service procurement in Europe, introduction of cross-border balancing...
conference paper 2020
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Nikolakakos, Christos (author), Mushtaq, U. (author), Palensky, P. (author), Cvetkovic, M. (author)
Renewable Energy Sources (RES), and especially wind turbines (WT) as the most mature technology, will provide a large share of energy generation in a future sustainable power system. This development introduces several challenges that need to be addressed in order to ensure a safe transition away from the fossil-fuel based generation. One of the...
conference paper 2020
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Evans, Michael (author), Tindemans, Simon H. (author), Angeli, David (author)
We consider the problem of dispatching a fleet of heterogeneous energy storage units to provide grid support. Under the restriction that recharging is not possible during the time frame of interest, we develop an aggregate measure of fleet flexibility with an intuitive graphical interpretation. This analytical expression summarises the full set...
journal article 2020
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Nikolakakos, Christos (author)
During previous centuries, humanity had relied on fossil fuels to generate the demanded energy. Nowadays, the extensive use of oil, gas and coal for energy production is becoming a major problem which concerns modern society. Global warming and climate change are the biggest challenges the scientific community has faced. The main factor which...
master thesis 2019
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Evans, Michael (author), Angeli, David (author), Strbac, Goran (author), Tindemans, Simon H. (author)
We present a method to find the maximum magnitude of any supply-shortfall service that an aggregator of energy storage devices is able to sell to a grid operator. This is first demonstrated in deterministic settings, then applied to scenarios in which device availabilities are stochastic. In this case we implement chance constraints on the...
conference paper 2019
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Tuinema, B.W. (author), Ayivor, P.K.S. (author), Garcia Suarez, V. (author), Ebrahim Adabi, M. (author), Liu, L. (author), Rueda, José L. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)
In the future energy system, hydrogen as an energy carrier will play a role of increasing importance. Electrical energy can be converted into hydrogen locally by electrolysers and stored for a relatively long period. Then, the hydrogen can be used by final consumers like the transportation system or industries, as conceptually illustrated in Fig...
conference paper 2019
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Vonsée, Daan (author)
Due to the intermittent character of renewable electricity sources and increasing decentralized electricity production, grid operators are facing challenges in balancing electricity- demand and supply within grid operations. These characteristics make it challenging for operators to forecast in- and outflowing electricity in the grid. This often...
master thesis 2018
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Alshehri, Feras (author)
The share of renewable energy sources in the electricity generation is expected to maintain a steady growth in the future driven by economic and environmental reasons. However, these renewable sources such as wind and solar have fluctuating power output. This fluctuation causes strain on the power system and can cause imbalances between...
master thesis 2018
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