3,442 research outputs found
Demand and Storage Management in a Prosumer Nanogrid Based on Energy Forecasting
Energy efficiency and consumers' role in the energy system are among the strategic research topics in power systems these days. Smart grids (SG) and, specifically, microgrids, are key tools for these purposes. This paper presents a three-stage strategy for energy management in a prosumer nanogrid. Firstly, energy monitoring is performed and time-space compression is applied as a tool for forecasting energy resources and power quality (PQ) indices; secondly, demand is managed, taking advantage of smart appliances (SA) to reduce the electricity bill; finally, energy storage systems (ESS) are also managed to better match the forecasted generation of each prosumer. Results show how these strategies can be coordinated to contribute to energy management in the prosumer nanogrid. A simulation test is included, which proves how effectively the prosumers' power converters track the power setpoints obtained from the proposed strategy.Spanish Agencia Estatal de Investigacion ; Fondo Europeo de Desarrollo Regional
Mobi_system : a personal travel assistance for electrical vehicles in smart cities
In this work it is proposed the design of a mobile system to assist car drivers in a smart city environment oriented to the upcoming reality of Electric Vehicles (EV). Taking into account the new reality of smart cites, EV introduction, Smart Grids (SG), Electrical Markets (EM), with deregulation of electricity production and use, drivers will need more information for decision and mobility purposes. A mobile application to recommend useful related information will help
drivers to deal with this new reality, giving guidance towards traffic, batteries charging process, and city mobility infrastructures (e.g. public transportation information, parking
places availability and car & bike sharing systems). Since this is an upcoming reality with possible process changes, development must be based on agile process approaches (Web services).Fundação para a Ciência e a Tecnologia (FCT)MIT-Portugal Progra
Calibration of a spatial simulation model with volunteered geographical information
For many scientific disciplines, the continued progression of information technology has increased the availability of data, computation and analytical methodologies including simulation and visualisation. Geographical information science is no exception. In this article, we investigate the possibilities for deployment of e-infrastructures to inform spatial planning, analysis and policy-making. We describe an existing architecture that feeds both static and dynamic simulation models from a variety of sources, including not only administrative datasets but also attitudes and behaviours which are harvested online from crowds. This infrastructure also supports visualisation and computationally intensive processing. The main aim of this article is to illustrate how spatial simulation models can be calibrated with crowd-sourced data. We introduce an example in which popular attitudes to congestion charging in a major UK city (Manchester) were collected, with promotional support from a high-profile media organisation (the BBC). These data are used to estimate the parameters of a transport simulation model, using a hungry estimation procedure which is deployed within a high-performance computational grid. We indicate how the resulting model might be used to evaluate the impact of alternative policy options for regulating the traffic in Manchester. Whilst the procedure is novel in itself, we argue that greater credibility could be added by the incorporation of open-source simulation models and by the use of social networking mechanisms to share policy evaluations much more widely
Internal report cluster 1: Urban freight innovations and solutions for sustainable deliveries (1/4)
Technical report about sustainable urban freight solutions, part 1 of
You are what you measure! But are we measuring it right? An empiric analysis of energy access metrics based on a multi-tier approach in Bangladesh
Measuring energy access through binary indicators is
insufficient, and often, even misleading. In this work, the
SE4ALL global tracking framework, and the recently
introduced ESMAP multi-tier approach, is critically
discussed analyzing questionnaire based primary data from
rural Bangladesh. The performance of different energy
interventions is evaluated using the new tier framework.
The challenges in its application lie in reliable data
collection, adequate gradation of indicators, and an
effective algorithm for the tier assignment based on the
specified set of attributes. The study showcases very high
sensitivities to parameter changes, different algorithms, and data requirements. The results reveal a clear trade-off
between capturing the multi-dimensionality of energy
access and the simplicity of an easy to use global
framework. Suggestions to improve the measuring
approach are made and conclusions are drawn for possible
implications of the tier framework for different energy
service offers in the market. Strengths and weaknesses of
the present measurement scheme are discussed and country
specific results interpreted through targeted gap analysis for future policy advice
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