Vanesa Valiño

Vanesa Valiño
Universidad Politécnica de Madrid | UPM · Departamento de Sistemas Energéticos

Doctor of Engineering

About

27
Publications
2,243
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77
Citations

Publications

Publications (27)
Article
Variable Speed Drives (VSDs) are key pieces in most of the industrial processes and thus, a secure operation must be ensured against possible harmful events such as ground faults. Fault location is a complex task that has been aggravated by the increasing presence of power converters. The switching commutations as long with the high frequency leaka...
Article
The increasing presence of electric drives demands the development of new detection and diagnosis methods of electrical faults. In particular, ground faults are the most common type of faults in electrical systems. Locating these faults is not trivial, as they depend not only on the position, but also on its fault resistance. This paper proposes a...
Patent
Full-text available
Spanish Patent: Sistema y método de localización de faltas a tierra en el lado de corriente alterna en instalaciones eléctricas con conversión entre corriente continua y corriente alterna (AC) basados en la medida de la tensión en un subsistema de puesta a tierra (8) instalado en un punto medio/neutro de la instalación eléctrica, en la medida de te...
Patent
Full-text available
Sistema y método de localización de faltas a tierra en el lado de corriente alterna (6) de una instalación eléctrica con conversión entre corriente continua y corriente alterna (DC/AC) basados en la medida de tensión en un subsistema de puesta a tierra (8) instalado en un punto neutro de una instalación con corriente continua y alterna, en la medid...
Conference Paper
Full-text available
Tutoring is an essential didactic resource of the learning process, in which students can receive specific attention about particular doubts and understanding problems. However, the personalized assistance to the problems that occurred during the autonomous learning process outside of the classroom has a delay when the tutoring takes place in perso...
Conference Paper
Full-text available
In the last decade, many alternative teaching methodologies have been developed, all of them belonging to the framework of educational innovation, with the aim of encouraging students' motivation, adapting to new technologies and improving learning. Specifically, this study focuses on the use of tutorial videos in which the explanation of some topi...
Conference Paper
Full-text available
Tutoring is an essential didactic resource of the learning process, in which students can receive specific attention about particular doubts and understanding problems. However, the personalized assistance to the problems that occurred during the autonomous learning process outside of the classroom has a delay when the tutoring takes place in perso...
Article
The good performance of solar photovoltaic energy facilities implies the previous evaluation of the electrical behaviour of the solar modules used. Among other ways, this evaluation can be done by means of the static voltage-current characteristic (I-V curve), but also through a real-time electrical parameters monitoring. This paper proposes the de...
Article
Full-text available
The increase in the number of renewable energy generating facilities has transformed the electricity distribution network into a Distributed Generation (DG) system. This has given rise to a new monitoring scenario for protective devices already installed across radial distribution networks, which may execute unexpected and inappropriate protective...
Article
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The work attempts to assess the effects of global warming on the efficacy of current greenhouse cooling methods following a methodology previously proved for other agricultural buildings. The cooling potential of four greenhouse cooling techniques (natural ventilation, forced ventilation, fogging and shading) were simulated by computer modelling fo...
Article
Full-text available
Active learning is one of the most efficient mechanisms for learning, according to the psychology of learning. When students act as teachers for other students, the communication is more fluent and knowledge is transferred easier than in a traditional classroom. This teaching method is referred to in the literature as reciprocal peer teaching. In t...
Conference Paper
Full-text available
The increasing use of renewable energy in electrical power systems has transformed the rural distribution network; providing it with distributed generation (DG) and consequently has stablished a new scenario for the installed protective devices. The installation of DG may cause untimely actions when protecting rural distribution networks and the la...
Article
We developed a methodology to evaluate the changes in cooling technologies of agricultural buildings derived from different scenarios of global climate change. Four 2080s scenarios were analysed for 6 European locations, using as a case study fattening pig farms and 3 cooling technologies: natural and forced ventilation, and cooling pads. The clima...
Article
Full-text available
This paper describes the experimental cooling of a greenhouse in Madrid (Spain) using a radiant heated floor (RHF) coupled to an air-water heat pump (HP). Two cooling scenarios were studied over the summers of 2005 and 2006: natural ventilation + a shading screen (control system), and natural ventilation + a shading screen + an RHF (concrete) coupl...
Article
In the last decade strong changes in the design of university degrees have occurred in Spain, affecting real competences acquired by graduates. The new degrees often provide students greater freedom in shaping their curriculum which results in many cases in a problem for their training. In engineering degrees of Spain, the final project, that allow...
Article
This work compares the results of three assessment systems used in two Spanish universities (the Universidad Politécnica de Madrid and the Universidad Católica de Ávila): the traditional system based on final examinations, continuous assessment with periodic tests and a proposed system (specially designed for heterogeneous student bodies) orientate...
Article
Interest in global warming effects on the agricultural systems is currently high, especially in areas which are likely to be more affected by this temperature rising, i.e. the Mediterranean area (IPCC, 2008). According to this report, the model projections of surface warming predict a temperature increase between 0.5°C to 1.5°C in the European area...
Article
Full-text available
Simple climate models performed with a widespread computer tool (Microsoft® Excel) could be useful for researchers or even greenhouse growers. A model of this type was used in three independent studies (heating, ventilation and cooling). The error in the calculation of temperature was lower than 2.5 ºC, and the error in the calculation of relative...
Article
Strategies for humidity control —with and without heating— were evaluated via simulations performed with a previously developed model (see accompanying paper, this issue, part I). With heating, the best strategy combined the use of a humidity setpoint with step control of the roof window, increasing the ventilation in line with the outside temperat...
Article
Full-text available
Experimental strategies for controlling humidity were compared in a greenhouse sited in Madrid, a continental site in the Mediterranean region. Small roof window apertures significantly reduced the relative humidity with only a limited increase in associated energy consumption. A simplified climate model with four energy exchange terms (heating, in...
Article
Despite the fact that heating the floor is actually used in greenhouse heating, aim of this study was to test this technology as a cooling method. The greenhouse used in this work was equipped with a heated concrete floor. A heat pump was arranged so that it removed the energy necessary to cool water inside the pipes (10-15°C). Two thermal control...

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