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Linear power flow method improved with numerical analysis techniques applied to a very large networkSereeter, B. (author), van Westering, W.H.P. (author), Vuik, Cornelis (author), Witteveen, C. (author)In this paper, we propose a fast linear power flow method using a constant impedance load model to simulate both the entire Low Voltage (LV) and Medium Voltage (MV) networks in a single simulation. Accuracy and efficiency of this linear approach are validated by comparing it with the Newton power flow algorithm and a commercial network design...journal article 2019
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Sereeter, B. (author), Vuik, Cornelis (author), Witteveen, C. (author)A general framework is given for applying the Newton–Raphson method to solve power flow problems, using power and current-mismatch functions in polar, Cartesian coordinates and complex form. These two mismatch functions and three coordinates, result in six possible ways to apply the Newton–Raphson method for the solution of power flow...journal article 2019
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Sereeter, B. (author), Vuik, Cornelis (author), Witteveen, C. (author), Palensky, P. (author)In this paper, we study four equivalent mathematical formulations of the Optimal Power Flow (OPF) problem and their impacts on the performance of solution methods. We show how four mathematical formulations of the OPF problem can be obtained by rewriting equality constraints given as the power flow problem into four equivalent mathematical...conference paper 2019
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Virgolin, M. (author), Alderliesten, Tanja (author), Bel, Arjan (author), Witteveen, C. (author), Bosman, P.A.N. (author)The recently introduced Gene-pool Optimal Mixing Evolutionary Algorithm for Genetic Programming (GP-GOMEA) has been shown to find much smaller solutions of equally high quality compared to other state-of-the-art GP approaches. This is an interesting aspect as small solutions better enable human interpretation. In this paper, an adaptation of...conference paper 2018
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Sereeter, B. (author), Vuik, Cornelis (author), Witteveen, C. (author)Two mismatch functions (power or current) and three coordinates (polar, Cartesian andcomplex form) result in six versions of the Newton–Raphson method for the solution of powerflow problems. In this paper, five new versions of the Newton power flow method developed forsingle-phase problems in our previous paper are extended to three-phase power...journal article 2017
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- Virgolin, M. (author), Dijk van, Irma (author), Wiersma, Jan (author), Ronckers, Cecile (author), Witteveen, C. (author), Rasch, Coen (author), Bel, Arjan (author), Alderliesten, Tanja (author), Bosman, P.A.N. (author) conference paper 2016
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Tang, J.M. (author), Vuik, C. (author), Witteveen, C. (author)In this report, the recent and future contributions of experts and groups of Delft University of Technology (DUT) on the topic of smart grids (SG) are presented. This may provide guidelines on how DUT can contribute in current and future SG projects, such as the current TKI project on “Smart Grid Evolution (SGE): Developing a service platform...report 2014
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Kreutzberger, E.D. (author), Konings, J.W. (author), Meijer, S. (author), Witteveen, C. (author), Meijers, B.M. (author), Pekin, E. (author), Macharis, C. (author), Kiel, J. (author), Kawabata, Y. (author), Vos, W. (author)This report is the first deliverable of the project Intermodal Rail Freight Twin Hub Network Northwest Europe. We call its subject Twin hub network and the organisational entity to carry out the actions the Twin hub project. The project is funded by INTERREG NWE (programme IVb). Its work started in December 2011 and will end by the end of 2015....report 2014
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- Wilson, M. (author), Klos, T.B. (author), Witteveen, C. (author), Huisman, B. (author) conference paper 2013
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Novak, P. (author), Witteveen, C. (author)In [2] we introduced a theoretical framework for modelling scalable information-aggregation systems. The framework is exposed on the background of a description of METIS, a system prototype aiming at supporting maritime safety and security by facilitating continuous monitoring of vessels in national coastal waters. Among the main problems of...conference paper 2013
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- Wilson, M. (author), Witteveen, C. (author), Huisman, B. (author) conference paper 2012
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Ter Mors, A.W. (author), Witteveen, C. (author)In multi-agent routing, there is a set of mobile agents each with a start location and destination location on a shared infrastructure. An agent wants to reach its destination as quickly as possible, but conflicts with other agents must be avoided. We have previously developed a single-agent route planning algorithm that can find a shortest-time...conference paper 2012
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Noroozian, A. (author), De Weerdt, M.M. (author), Witteveen, C. (author)The fundamental problem with P2P networks is that quality of service depends on altruistic resource sharing by participating peers. Many peers freeride on the generosity of others. Current solutions like sharing ratio enforcement and reputation systems are complex, exploitable, inaccurate or unfair at times. The need to design scalable...conference paper 2012
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Endhoven, L. (author), Klos, T.B. (author), Witteveen, C. (author)Multi-agent planning and scheduling concerns finding a joint plan to achieve some set of common goals with several independent agents each aiming to find a plan or schedule for their part of the goals. To avoid conflicts in these individual plans or schedules decoupling is used. Such a decoupling entails adding local constraints for the agents...conference paper 2011
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Wilson, M. (author), Roos, N. (author), Huisman, B. (author), Witteveen, C. (author)NedTrain is a Dutch company tasked with performing the maintenance of the rolling stock of the national railway company, NS. NedTrain owns several workshops at different locations. The scheduling in one such workshop will be taken as point of departure for the discussion in this paper. After discussing a suitable representation of the NedTrain...conference paper 2011
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Verwer, S.E. (author), De Weerdt, M.M. (author), Witteveen, C. (author)We develop a novel learning algorithm RTI for identifying a deterministic real-time automaton (DRTA) from labeled time-stamped event sequences. The RTI algorithm is based on the current state of the art in deterministic finite-state automaton (DFA) identification, called evidence-driven state-merging (EDSM). In addition to having a DFA structure...journal article 2011
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Verwer, S.E. (author), De Weerdt, M.M. (author), Witteveen, C. (author)We advocate the use of an explicit time representation in syntactic pattern recognition because it can result in more succinct models and easier learning problems. We apply this approach to the real-world problem of learning models for the driving behavior of truck drivers. We discretize the values of onboard sensors into simple events. Instead...conference paper 2011
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Zutt, J. (author), Van Gemund, A.J.C. (author), De Weerdt, M.M. (author), Witteveen, C. (author)An important problem in transportation is how to ensure efficient operational route planning when several vehicles share a common road infrastructure with limited capacity. Examples of such a problem are route planning for automated guided vehicles in a terminal and route planning for aircraft taxiing at airports. Maintaining efficiency in such...book chapter 2010
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Verwer, S. (author), De Weerdt, M.M. (author), Witteveen, C. (author)We develop theory on the efficiency of identifying (learning) timed automata. In particular, we show that: (i) deterministic timed automata cannot be identified efficiently in the limit from labeled data and (ii) that one-clock deterministic timed automata can be identified efficiently in the limit from labeled data. We prove these results based...journal article 2010
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- Verwer, S. (author), De Weerdt, M.M. (author), Witteveen, C. (author) conference paper 2010