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- De Vries, P. (author), Boelhouwer, P.J. (author) conference paper 2015
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- De Vries, B. (author), Jessurun, J. (author), Engeli, M. (author) conference paper 2000
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De Vries, S. (author), Stive, M.J.F. (author), Van Rijn, L. (author), Ranasinghe, R. (author)In this paper a new conceptual model for aeolian sediment transport rates is presented. Traditional sediment transport formulations have known limitations when applied to coastal beach situations. A linear model for sediment transport rates with respect to wind speed is proposed and supported by both data and numerical model simulations. The...conference paper 2012
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De Vries, S. (author), De Schipper, M.A. (author), Stive, M.J.F. (author)In this paper it is aimed to quantify bulk (surf-zone integrated) alongshore sediment transport using morphological data collected along the Dutch coast. The collected morphological data covers a domain of 18 km alongshore including the beach, the foreshore and the intertidal zone in the cross shore. The measurement domain contains the 20...conference paper 2014
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- Negro, E. (author), De Vries, M. (author), Latsuzbaia, R. (author), Koper, G.J.M. (author) conference paper 2013
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- De Groot, A.V. (author), De Vries, S. (author), Keijsers, J.G.S. (author), Riksen, M.J.P.M. (author), Ye, Q. (author), Poortinga, A. (author), Arens, S.M. (author), Bochev-Van der Burgh, L.M. (author), Wijnberg, K.M. (author), Schretlen, J.L. (author), Van Thiel De Vries, J.S.M. (author) conference paper 2012
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Verhagen, H.J. (author), De Vries, W.S. (author)Practical problems in the transfer of knowledge and skills to coastal engineers in training, with focus on the training of coastal engineers from developing countries and other countries in transition. The difference between the training of scientists and engineers.conference paper 1999
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- Bhagwat, P.C. (author), Iychettira, K.K. (author), De Vries, Laurens (author) conference paper 2013
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- Philipsen, R.M. (author), Morales-Espana, G. (author), de Weerdt, M.M. (author), De Vries, Laurens (author) conference paper 2017
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Pelka, S. (author), Conradie, Peter (author), De Vries, Laurens (author), Anatolitis, Vasilios (author), Martens, Emma (author), Chappin, E.J.L. (author), Karaliopoulos, Merkouris (author), Anagnostopoulos, Filippos (author), Preuß, Sabine (author)Prosumers with photovoltaic systems can reduce their electricity expenses by increasing their consumption of self-generated electricity. This makes them more resilient to price shocks, like the 2022 European energy crisis. We evaluate how prosumers adapt their consumption behavior in response to such political uncertainty and increasing...conference paper 2023
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Market Failures in Local Flexibility Market Proposals for Distribution Network Congestion ManagementHennig, R.J. (author), Tindemans, Simon H. (author), De Vries, Laurens (author)The steady uptake of PV cells and high-power flexible loads such as electric vehicles (EVs) and heat pumps can lead to localized network congestion, if their power consumption or feed-in is not controlled well. One potential way that has been proposed to manage this congestion, are so-called Local Flexibility Markets. It is often argued, that...conference paper 2022
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Philipsen, R.M. (author), Morales-Espana, G. (author), de Weerdt, M.M. (author), De Vries, Laurens (author)In order to cope with fluctuations and uncertainty, power systems rely on contracted reserves. The day-ahead Unit Commitment (UC) is the short-term planning process which is commonly used to schedule these resources at minimum cost, while operating the system and units within secure technical limits. This paper shows through the evaluation of...conference paper 2016
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Piao, L. (author), de Weerdt, M.M. (author), De Vries, Laurens (author)DC distribution systems (DCDS) connect local generators and loads directly. By avoiding unnecessary losses in AC-DC conversion, DCDS offers higher energy efficiency. Since different parties in a DCDS may have conflicting goals, matching between power supply and demand should be done with carefully designed allocation rules and monetary transfers...conference paper 2017
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Philipsen, R.M. (author), de Weerdt, M.M. (author), De Vries, Laurens (author)Large controllable loads, such as electric vehicles, are increasingly penetrating electricity distribution feeders. To avoid local congestion, their consumption behaviour must be steered, for which a real-time price propagated down from the transmission system does not suffice, as it does not reflect local grid conditions. To efficiently steer...conference paper 2016
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Piao, L. (author), De Vries, Laurens (author), de Weerdt, M.M. (author), Yorke-Smith, N. (author)Direct current distribution systems (DCDS), which connect local prosumers directly to community grids without AC/DC conversions, are a promising alternative to AC systems. While regulations call for market-based operation, existing markets for AC systems do not meet DC requirements and cannot be applied to a DCDS. This paper develops a design...conference paper 2018
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Piao, L. (author), De Vries, Laurens (author), de Weerdt, M.M. (author), Yorke-Smith, N. (author)Direct Current Distribution System (DCDS), a promising alternative to existing AC systems, connect customers to DC energy sources without AC/DC conversion. The unique features of DC, including the power-voltage coupling effect, impose different requirements to DCDS operation compared to AC. Addressing a liberalized energy market, this paper...conference paper 2019
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Pelka, Sabine (author), De Vries, Laurens (author), Deissenroth, Marc (author)With an increasing wind and photovoltaic share, the German generation mix becomes more weather-dependent. Backup technologies can help to bridge scarcity moments. These rare moments with high prices are the main events for their cost recovery. However, the uncertain revenue flow combined with long payback periods leads to high investment...conference paper 2019
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Hennig, R.J. (author), Jonker, Martijn (author), Tindemans, Simon H. (author), De Vries, Laurens (author)Residential distribution networks in Europe are undergoing rapid changes. As high-power flexible loads, such as electric vehicle (EV) chargers, become more prevalent, the risk of network congestion increases. This is exacerbated by tariff structures which do not give incentives to limit simultaneous power consumption. Network charges in this...conference paper 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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Poplavskaya, Ksenia (author), De Vries, Laurens (author)The aggregator has been touted as the key enabler of active engagement of distributed energy resources and promises to contribute to greater economic efficiency in the European balancing markets by providing cheap sources of flexibility. This paper presents an empirical analysis of how aggregators organize themselves in relation to other...conference paper 2018