Javier Aguiar

Dr. Javier Aguiar

Department of Signal Theory and Communications, and Telematics Engineering, University of Valladolid, Valladolid 47011, Spain

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 March 2013 in Energies
Verified
Journal Article
Open access
PDF file
Luis Hernández-CallejoLuis Hernández-Callejo
Luis Hernández-Callejo
CBCarlos Baladron
Carlos Baladron
Javier AguiarJavier Aguiar
Javier Aguiar
BCBelén Carro
Belén Carro
ASAntonio J. Sanchez-Esguevillas
Antonio J. Sanchez-Esguevillas
Jaime LloretJaime Lloret
Jaime Lloret
Electricity is indispensable and of strategic importance to national economies. Consequently, electric utilities make an effort to balance power generation and demand in order to offer a good service at a competitive price. For this purpose, these utilities need electric load forecasts to be as accurate as possible. However, electric load depends on many factors (day of the week, month of the year, etc.), which makes load forecasting quite a complex process requiring something other than statistical methods. This study presents an electric load forecast architectural model based on an Artificial Neural Network (ANN) that performs Short-Term Load Forecasting (STLF). In this study, we present the excellent results obtained, and highlight the simplicity of the proposed model. Load forecasting was performed in a geographic location of the size of a potential microgrid, as microgrids appear to be the future of electric power supply.

31 March 2023 in Sustainability
Verified
Journal Article
Open access
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María Ángeles Pérez JuárezMaría Ángeles Pérez Juárez
María Ángeles Pérez Juárez
DGDavid González-Ortega
David González-Ortega
Javier AguiarJavier Aguiar
Javier Aguiar
Technology enables a more sustainable and universally accessible educational model. However, technology has brought a paradox into students’ lives: it helps them engage in learning activities, but it is also a source of distraction. During the academic year 2021–2022, the authors conducted a study focusing on classroom distractions. One of the objectives was to identify the main digital distractions from the point of view of students. The study was carried out at an engineering school, where technology is fully integrated in the classroom and in the academic routines of teachers and students. Discussions and surveys, complemented by a statistical study based on bivariate correlations, were used with participating students (n = 105). Students considered digital distractions to have a significant impact on their performance in lab sessions. This performance was mainly self-assessed as improvable. Contrary to other contemporary research, the results were not influenced by the year of study of the subject, as the issue is important regardless of the students’ backgrounds. Professors should implement strategies to raise students’ awareness of the significant negative effects of digital distractions on their performance, as well as to develop students’ self-control skills. This is of vital importance for the use of technology to be sustainable in the long-term.

27 August 2012 in Sensors
Verified
Journal Article
Open access
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Luis Hernández-CallejoLuis Hernández-Callejo
Luis Hernández-Callejo
CBCarlos Baladron
Carlos Baladron
Javier AguiarJavier Aguiar
Javier Aguiar
LCLorena Calavia
Lorena Calavia
BCBelén Carro
Belén Carro
JGJorge Gomez-Sanz
Jorge Gomez-Sanz
One of the main challenges of today’s society is the need to fulfill at the same time the two sides of the dichotomy between the growing energy demand and the need to look after the environment. Smart Grids are one of the answers: intelligent energy grids which retrieve data about the environment through extensive sensor networks and react accordingly to optimize resource consumption. In order to do this, the Smart Grids need to understand the existing relationship between energy demand and a set of relevant climatic variables. All smart “systems” (buildings, cities, homes, consumers, etc.) have the potential to employ their intelligence for self-adaptation to climate conditions. After introducing the Smart World, a global framework for the collaboration of these smart systems, this paper presents the relationship found at experimental level between a range of relevant weather variables and electric power demand patterns, presenting a case study using an agent-based system, and emphasizing the need to consider this relationship in certain Smart World (and specifically Smart Grid and microgrid) applications.

17 March 2014 in Energies
Verified
Journal Article
Open access
PDF file
Luis Hernández-CallejoLuis Hernández-Callejo
Luis Hernández-Callejo
CBCarlos Baladron
Carlos Baladron
Javier AguiarJavier Aguiar
Javier Aguiar
LCLorena Calavia
Lorena Calavia
BCBelén Carro
Belén Carro
Jaime LloretJaime Lloret
Jaime Lloret
The new paradigms and latest developments in the Electrical Grid are based on the introduction of distributed intelligence at several stages of its physical layer, giving birth to concepts such as Smart Grids, Virtual Power Plants, microgrids, Smart Buildings and Smart Environments. Distributed Generation (DG) is a philosophy in which energy is no longer produced exclusively in huge centralized plants, but also in smaller premises which take advantage of local conditions in order to minimize transmission losses and optimize production and consumption. This represents a new opportunity for renewable energy, because small elements such as solar panels and wind turbines are expected to be scattered along the grid, feeding local installations or selling energy to the grid depending on their local generation/consumption conditions. The introduction of these highly dynamic elements will lead to a substantial change in the curves of demanded energy. The aim of this paper is to apply Short-Term Load Forecasting (STLF) in microgrid environments with curves and similar behaviours, using two different data sets: the first one packing electricity consumption information during four years and six months in a microgrid along with calendar data, while the second one will be just four months of the previous parameters along with the solar radiation from the site. For the first set of data different STLF models will be discussed, studying the effect of each variable, in order to identify the best one. That model will be employed with the second set of data, in order to make a comparison with a new model that takes into account the solar radiation, since the photovoltaic installations of the microgrid will cause the power demand to fluctuate depending on the solar radiation.

12 December 2012 in Energies
Verified
Journal Article
Open access
PDF file
Luis Hernández-CallejoLuis Hernández-Callejo
Luis Hernández-Callejo
CBCarlos Baladron
Carlos Baladron
Javier AguiarJavier Aguiar
Javier Aguiar
BCBelén Carro
Belén Carro
ASAntonio Sanchez-Esguevillas
Antonio Sanchez-Esguevillas
Understanding of energy consumption patterns is extremely important for optimization of resources and application of green trends. Traditionally, analyses were performed for large environments like regions and nations. However, with the advent of Smart Grids, the study of the behavior of smaller environments has become a necessity to allow a deeper micromanagement of the energy grid. This paper presents a data processing system to analyze energy consumption patterns in industrial parks, based on the cascade application of a Self-Organizing Map (SOM) and the clustering k-means algorithm. The system is validated with real load data from an industrial park in Spain. The validation results show that the system adequately finds different behavior patterns which are meaningful, and is capable of doing so without supervision, and without any prior knowledge about the data.

28 January 2023 in Sensors
Verified
Journal Article
Open access
PDF file
Javier AguiarJavier Aguiar
Javier Aguiar
María Ángeles Pérez JuárezMaría Ángeles Pérez Juárez
María Ángeles Pérez Juárez
Smart grids are able to forecast customers’ consumption patterns, i.e., their energy demand, and consequently electricity can be transmitted after taking into account the expected demand. To face today’s demand forecasting challenges, where the data generated by smart grids is huge, modern data-driven techniques need to be used. In this scenario, Deep Learning models are a good alternative to learn patterns from customer data and then forecast demand for different forecasting horizons. Among the commonly used Artificial Neural Networks, Long Short-Term Memory networks—based on Recurrent Neural Networks—are playing a prominent role. This paper provides an insight into the importance of the demand forecasting issue, and other related factors, in the context of smart grids, and collects some experiences of the use of Deep Learning techniques, for demand forecasting purposes. To have an efficient power system, a balance between supply and demand is necessary. Therefore, industry stakeholders and researchers should make a special effort in load forecasting, especially in the short term, which is critical for demand response.