Persona:
Colmenar Santos, Antonio

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0000-0001-8543-4550
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Colmenar Santos
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Antonio
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2018 - 20204
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Autor: Molina Ibáñez, Enrique Luis ×

Resultados de la búsqueda

Mostrando 1 - 4 de 4
  • Miniatura
    Publicación
    Simulation of modeling of multi-megawatt photovoltaic plants with high voltage direct current grid integration
    (Elsevier, 2018-05-15) Guinduláin Argandoña, Tomás; Rosales Asensio, Enrique; Molina Ibáñez, Enrique Luis; Blanes Peiró, Jorge Juan; Colmenar Santos, Antonio
    This paper develops an integrated model of multi megawatt PV plant with HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternating Current) network, using the specific software of power electronics PSIM. This model has been developed by functional blocks, including the photovoltaic field itself, the pertinent conversion units for the integration of each network as well as the network type for production. The models allow to obtain transmissions loss for any combination of the three variables on which they depend; network length (km), temperature (°C) and irradiance (W/m2). To verify the validity of the model and demonstrate the distribution advantages of HVDC -even for relatively low-photovoltaic power plants in comparison to the common applications currently used in HVDC networks-, a case study has been used which has led to the conclusion that the use of HVDC networks may be convenient for this type of power generation plants.
  • Miniatura
    Publicación
    Technical approach for the inclusion of superconducting magnetic energy storage in a smart city
    (Elsevier, 2018-09-01) Molina Ibáñez, Enrique Luis; Rosales Asensio, Enrique; Colmenar Santos, Antonio; López-Rey García-Rojas, África
    Smart grids are a concept which is evolving quickly with the implementation of renewable energies and concepts such as Distributed Generation (DG) and micro-grids. Energy storage systems play a very important role in smart grids. The characteristics of smart cities enhance the use of high power density storage systems, such as SMES systems. Because of this, we studied the possibility of adapting these systems in this kind of electrical topology by simulating the effects of an energy storage system with high power density (as SMES). An electrical and control adaptation circuit for storing energy was designed. The circuit consisted of three blocks. The first one was a passive filter LCL. The second was a converter system that allows rectifying of the signal when the system runs in charge mode but acts as an inverter when it changes to discharge mode. Finally, there is a chopper that allows the current levels to be modified. Throughout simulations, we have seen the possibility of controlling the energy supply so as the storage. This permits to adapt to different contingencies which may induce the wiring of the charge in the net, as well as different types of charges. Despite the technical contribution of this kind of systems in the Spanish electrical network, there are big obstacles that would prevent its inclusion in the network, such as the high cost of manufacturing and maintenance compared with other cheaper systems such as superconductors or the low energy density, which limits their use.
  • Miniatura
    Publicación
    Technical challenges for the optimum penetration of grid-connected photovoltaic systems: Spain as a case study
    (Elsevier, 2020-01) Linares Mena, Ana Rosa; Molina Ibáñez, Enrique Luis; Rosales Asensio, Enrique; Borge Díez, David; Colmenar Santos, Antonio
    This research reviews the technical requirements of grid-connected photovoltaic power plants to increase their competitiveness and efficiently integrate into the grid to satisfy future demand requirements and grid management challenges, focusing on Spain as a case study. The integration of distributed resources into the electric network, in particular photovoltaic energy, requires an accurate control of the system. The integration of photovoltaic energy has resulted in significant changes to the regulatory framework to ensure proper integration of distributed generation units in the grid. In this study, the requirements of the system operator for the management and smart control are first analysed and then the technical specifications established by the network operator in reference to the components of the facility are evaluated. This analysis identifies the shortcomings of the current legislation and concludes with a summary of the main technical recommendations and future regulatory challenges that need to be undertaken in the future. It is presented as a reference case that can be adapted worldwide.
  • Miniatura
    Publicación
    Legislative and economic aspects for the inclusion of energy reserve by a superconducting magnetic energy storage: Application to the case of the Spanish electrical system
    (Elsevier, 2018-02) Molina Ibáñez, Enrique Luis; Rosales Asensio, Enrique; Blanes Peiró, Jorge Juan; Colmenar Santos, Antonio
    With the encouragement from renewable energies, elements of the electrical system are magnified which make possible a suitable connection to the electrical network. Among others, energy storage systems (ESSs) are emphasized because of their impact. This article discusses two essential aspects to take into account for an ESS, that is the regulatory framework and the economic aspect. In particular, it focuses on superconducting magnetic energy storage (SMES) in the Spanish electrical system. An analysis is performed on the legislation and regulations that apply to energy storage systems, which may affect in a direct or indirect manner its inclusion. This is accompanied by an analysis of the legislation in different countries to assess the situation in Spain in this regard, by comparison. Another point to take into consideration, which is crucial for the correct development and inclusion of this type of elements, is the economic viability- showing the costs of manufacturing and maintenance of these systems. Although it is necessary to keep investigating to lower the costs, economic benefits are appreciated, among other things, owing to the increase of the reliability of the electrical network. This increase of the reliability is resultant from a decrease of the cuts of service and the improvement of the quality of the energy.