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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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20183
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Autor: Blanes Peiró, Jorge Juan ×

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Mostrando 1 - 3 de 3
  • 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
    Technological improvements in energetic efficiency and sustainability in existing combined-cycle gas turbine (CCGT) power plants
    (Elsevier, 2018-08-01) Gómez Camazón, David; Rosales Asensio, Enrique; Blanes Peiró, Jorge Juan; Colmenar Santos, Antonio
    Data from an existing combined-cycle gas turbine (CCGT) power plant are used to create a computer simulation to allow efficiency and emission calculations, simulation and assessing improvements that apply partial regeneration with solar hybridization. The proposed amendments to this triple-pressure steam-reheat combined cycle (CCC3PR) with 400 MW of net power incorporates a regenerator and thermal energy, from a source of renewable solar energy up to 50 MW, in order to reduce the energy loss in the gas turbine. The calculation and simulation models were created using Visual Basic code. Regeneration and solar hybridization were found to contribute to increasing efficiencies of around 2.25% to 3.29% depending on the loading point. The reduction of gas consumption was between 6.25% and 9.45% and the overall cycle efficiency loss is minimal due to hybridization. There was a loss of the net power of the new cycle but it is considerably lower if than heat from a renewable source is supplied to the cycle. This net power loss has an average value of 7.5% with regeneration only and of 1% with regeneration and hybridization. The reduction of fuel consumption is significant which could result in saving approximately 4 million €/year. Partial regeneration in the gas turbine and solar thermal power in the existing CCGTs provide an interesting possibility for reducing emissions (by 26,167 t/year). In conclusion, partial regeneration with solar hybridization provides an interesting and proven possibility to increase performance and efficiency whilst reducing emissions from the existing CCC3PR.
  • 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.