Mateo Domingo C.,Comillas Pontifical University |
Gomez San Roman T.,Comillas Pontifical University |
Sanchez-Miralles A.,Comillas Pontifical University |
Peco Gonzalez J.P.,Institute Investigacion Tecnologica |
Candela Martinez A.,Spanish Energy Commission CNE
IEEE Transactions on Power Systems | Year: 2011
A Reference Network Model (RNM) is a large-scale distribution planning tool that can help regulators to estimate efficient costs in the context of incentive regulation applied to distribution companies. This paper presents the main features of an RNM developed for planning distribution networks from scratch, greenfield planning, or incrementally from an existing grid. Two properties of the model are highlighted: the simultaneous planning of high-, medium-, and low-voltage networks by using simultaneity factors; and the layout of cables in urban areas, taking into consideration the street map, which is automatically generated by the model. A case study evaluates the impact of these features on the results. © 2010 IEEE.
Matanza J.,Comillas Pontifical University |
Alexandres S.,Comillas Pontifical University |
Rodriguez-Morcillo C.,Institute Investigacion Tecnologica
Computer Standards and Interfaces | Year: 2013
The present work analyzes and compares two popular standards for data transmission over power line networks: PRIME and G3. A complete and detailed description of both standards is presented together with simulation results of their performance in a power line environment. In order to create an accurate analogy of the transmission channel, background and asynchronous impulsive noises are included using previous results from literature. Simulation results show how PRIME and G3 behave in several noisy environments. Finally, with respect to PRIME, a proposal is made to increase its performance in a hardly impulsive noise channel. © 2013 Elsevier B.V.
Linares P.,Institute Investigacion Tecnologica |
Linares P.,Economy Energy |
Conchado A.,Institute Investigacion Tecnologica
Energy Economics | Year: 2013
Even after Fukushima, the nuclear debate is strong in many countries, with the discussion of its economics being a significant part of it. However, most of the estimates are based on a levelized-cost methodology, which presents several shortcomings, particularly when applied to liberalized electricity markets. Our paper provides results based on a different methodology, by which we determine the break-even investment cost for nuclear power plants to be competitive with other electricity generation technologies. Our results show that the cost competitiveness of nuclear power plants is questionable, and that public support of some sort would be needed if new nuclear power plants are to be built in liberalized markets. © 2013 Elsevier B.V.
Pache C.,French Electricity Transmission Network |
Maeght J.,French Electricity Transmission Network |
Seguinot B.,French Electricity Transmission Network |
Zani A.,RSE SpA |
And 6 more authors.
IEEE Power and Energy Society General Meeting | Year: 2015
This paper presents a new methodology for long-term transmission planning over large systems. The developed approach aims at finding the optimal design of a large grid including its modular development plan over a long time horizon. Advanced optimization and simulation methods have been investigated to tackle this very large and complex problem, which includes highly combinatorial aspects and stochastic behaviours of system components, while ensuring some control over the system. Some tools have been implemented and tested on a case study based on the French and Spanish systems. The preliminary results of this study give an estimation of the resources that would be needed for a real study over a system of the size of the whole pan-European network for the period 2020 to 2050. © 2015 IEEE.
Campos F.A.,Institute Investigacion Tecnologica |
Gascon A.,Institute Investigacion Tecnologica |
Latorre J.M.,Institute Investigacion Tecnologica |
Soler J.R.,Institute Investigacion Tecnologica
Cryptologia | Year: 2013
This article describes the application of modern algorithms to crack the official encryption method of the Spanish Civil War: the Strip Cipher. It shows the differences in efficiency and effectiveness between a genetic algorithm and mathematical programming, the optimisation methods known collectively as mathematical optimisation. Unlike the genetic algorithm, the programming approach has been seen to lead to high computational costs or to non-legible plain texts, which make it impractical. To improve the search for the genetic operators used, a dictionary is applied to identify possible words in each partially decrypted text and, thus, unblock the process. Results and conclusions have been obtained by analysing the outcome of the algorithms when attacking real ciphertexts found in the General Archive of the Spanish Civil War in Spain. Both the mathematical programming and the genetic algorithm approaches have merit, but the latter has considerable practical advantages. © 2013 Copyright Taylor and Francis Group, LLC.