Showing papers by "Juan Manuel Campos Carrasco published in 2011"
01 Nov 2011
TL;DR: A review of ESSs for transport and grid applications is presented, covering several aspects such as the storage technology and their main applications providing a description of the systems and addressing the most suitable storage technology.
Abstract: Energy storage systems (ESSs) are enabling technologies for well-established and new applications such as power peak shaving, electric vehicles, integration of renewable energies, etc. This paper presents a review of ESSs for transport and grid applications, covering several aspects such as the storage technology and their main applications providing a description of the systems and addressing the most suitable storage technology. This paper is based on the experience of the co-organizers of the Special Session on Energy Storage Systems of the IEEE Transactions on Industrial Electronics published in december 2010.
38 citations
01 Jan 2011
TL;DR: In this article, the main objective of the generator is to transform the mechanical energy captured by the rotor of the wind turbine into electrical energy that will be injected into the utility grid.
Abstract: A horizontal-axis wind turbine is the most extensively used method for wind energy extraction. The power rating varies from a few watts to megawatts on large grid-connected wind turbines. The rotor is the part of the wind turbine that transforms the energy from the wind into mechanical energy. The area swept by the rotor is the area that captures the energy from the wind. The pitch control of a wind turbine makes it possible to regulate energy extraction at high speed wind condition. On the other hand, the use of variable speed makes the systems more expensive to build and maintain. The main objective of the generator is to transform the mechanical energy captured by the rotor of the wind turbine into electrical energy that will be injected into the utility grid. Asynchronous generators are commonly used in wind turbine applications with fixed speed or variable speed control strategies. The rotor electromagnets are fed back with a DC current by rectifying part of the electricity generated. Another kind of generator recently used is the permanent magnet.
6 citations
01 Jan 2011
TL;DR: In this article, the main objective of the generator is to transform the mechanical energy captured by the rotor of the wind turbine into electrical energy that will be injected into the utility grid.
Abstract: A horizontal-axis wind turbine is the most extensively used method for wind energy extraction. The power rating varies from a few watts to megawatts on large grid-connected wind turbines. The rotor is the part of the wind turbine that transforms the energy from the wind into mechanical energy. The area swept by the rotor is the area that captures the energy from the wind. The pitch control of a wind turbine makes it possible to regulate energy extraction at high speed wind condition. On the other hand, the use of variable speed makes the systems more expensive to build and maintain. The main objective of the generator is to transform the mechanical energy captured by the rotor of the wind turbine into electrical energy that will be injected into the utility grid. Asynchronous generators are commonly used in wind turbine applications with fixed speed or variable speed control strategies. The rotor electromagnets are fed back with a DC current by rectifying part of the electricity generated. Another kind of generator recently used is the permanent magnet.
3 citations
11 May 2011
TL;DR: In this paper, a general overview of the current power electronic technology that permits the integration of renewable energies into the smart grid is presented, and the Smart City project aims to develop a demonstrator of a smart grid in Malaga city in which customers and distribution companies work together to achieve sustainable energy consumption, by increased use of renewable energy sources, bringing generation closer to customers and making a commitment to rational and efficient consumption.
Abstract: The smart grids are electricity networks that can intelligently integrate the behaviour and actions of all users connected to it in order to efficiently deliver sustainable, economic and secure electricity supplies. One of the reasons why smart grid is generating so much interest right now is its ability to enable the integration of renewable energy into the electric power network, leading to a broader generation portfolio and potentially beneficial carbon implications. In this presentation, a general overview of the current power electronic technology that permits the integration of renewable energies into the smart grid will be analyzed. In particular, it will be described the "Smart City" project aims to develop a demonstrator of a smart grid in Malaga city in which customers and distribution companies work together to achieve sustainable energy consumption, by increased use of renewable energy sources, bringing generation closer to customers and making a commitment to rational and efficient consumption. A network of this type is essential in order to deploy electric vehicles.
3 citations
11 May 2011
TL;DR: A new soft switching bidirectional cuk converter is introduced which can be applied as the interface circuit between DC bus and batteries for stand-alone photovoltaic systems with low weight, small volume, high efficiency and reduced switching losses.
Abstract: In this paper, a new soft switching bidirectional cuk converter is introduced which can be applied as the interface circuit between DC bus and batteries for stand-alone photovoltaic systems. Since the voltage level of DC bus and batteries are different, the interface circuit must be able to increase or decrease the voltage level in each power flow direction while limiting the current. In contrast to almost all previous introduced bidirectional converters, the proposed bidirectional converter uses only one auxiliary switch to provide soft switching condition for all semiconductor devices. Low weight, small volume, high efficiency and reduced switching losses are the most important features of the proposed bidirectional converter. The converter operational modes are analyzed and simulation results are given to confirm the theoretical analysis.
2 citations
23 Mar 2011
TL;DR: In this article, the Roman phase of a rural settlement located in the current periphery of Huelva and that is characterized by the existence of a population continuum on the site from Roman epoch until the seventies of last century, is analyzed.
Abstract: En este trabajo se analiza la fase romana de un asentamiento de caracter rural localizado en la actual periferia del casco urbano de Huelva y que se caracteriza por la existencia de un continuum poblacional sobre el sitio que se evidencia desde epoca romana y hasta los anos setenta del pasado siglo. A pesar de que las estructuras in situ se datan en la epoca bajoimperial, el registro ceramico obtenido nos habla de una instalacion romana mas amplia, funcionando al menos desde el siglo I a.C. y hasta el siglo VI d.C. In this work, the Roman phase of a rural settlement located in the current periphery of Huelva and that is characterized by the existence of a population continuum on the site from Roman epoch until the seventies of last century, is analyzed. In spite of the fact that the archaeological structures conserved are from late Roman epoch, the pottery analyzed speaks us about a more wide Roman settlement working at least from the 1st century B.C. to the 6th century A.D.
1 citations