The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

Ivan De Miguel - One of the best experts on this subject based on the ideXlab platform.

  • zonal thermal model of the ventilation of underground Transformer Substations development and parametric study
    Applied Thermal Engineering, 2014
    Co-Authors: Maximiliano Beiza, Juan Carlos Ramos, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract An algebraic thermal zonal model of the ventilation of underground Transformer Substations during a standardised temperature rise test is presented in this paper. The development and adjustment of the proposed model rely on the analysis of the air flow pattern and temperature distributions obtained by a more complex model numerically solved by means of CFD techniques. The flow domain of the model represents a section of the Substations divided into several interrelated zones where the mass and the energy conservation equations are formulated and the generated system of nonlinear algebraic equations is solved. The model is validated by comparing its results with the ones obtained by the CFD model and with the experimental results of eight temperature rise tests under different conditions. A parametric analysis was carried out on the model to prove its utility as an efficient tool to improve and optimise the thermal performance of Transformer Substations during the design process. From the parametric study it has been inferred that the main parameters affecting the ventilation of the Substations are the pass area between the LV–MV zone and the Transformer zone, the surface area of the ventilation grilles in the substation with horizontal ventilation, and the perimeter of the protruding ventilation vents in the substation with vertical ventilation.

  • numerical modelling of the natural ventilation of underground Transformer Substations
    Applied Thermal Engineering, 2013
    Co-Authors: Juan Carlos Ramos, Maximiliano Beiza, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract Ventilation by natural convection of two underground Transformer Substations has been numerically modelled. The model has been verified in terms of discretization errors and it has been validated with the experimental results of eight temperature rise tests carried out under different conditions of ventilation and Transformer power losses. The results of the simulations serve to analyse the air flow pattern and the air temperature distributions inside the substation. A correlation for the air mass flow rate as a function of the ventilation conditions (discharge coefficient and area of the grilles) and the heat dissipated by the Transformer has been fitted. The heat transfer coefficients on the surfaces of the Transformer and the walls of the enclosure can also be obtained from the simulations of the model. All this information will be used in a future paper to develop a zonal thermal model of the ventilation of the Substations that can be employed as a design and optimisation tool.

Maximiliano Beiza - One of the best experts on this subject based on the ideXlab platform.

  • zonal thermal model of the ventilation of underground Transformer Substations development and parametric study
    Applied Thermal Engineering, 2014
    Co-Authors: Maximiliano Beiza, Juan Carlos Ramos, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract An algebraic thermal zonal model of the ventilation of underground Transformer Substations during a standardised temperature rise test is presented in this paper. The development and adjustment of the proposed model rely on the analysis of the air flow pattern and temperature distributions obtained by a more complex model numerically solved by means of CFD techniques. The flow domain of the model represents a section of the Substations divided into several interrelated zones where the mass and the energy conservation equations are formulated and the generated system of nonlinear algebraic equations is solved. The model is validated by comparing its results with the ones obtained by the CFD model and with the experimental results of eight temperature rise tests under different conditions. A parametric analysis was carried out on the model to prove its utility as an efficient tool to improve and optimise the thermal performance of Transformer Substations during the design process. From the parametric study it has been inferred that the main parameters affecting the ventilation of the Substations are the pass area between the LV–MV zone and the Transformer zone, the surface area of the ventilation grilles in the substation with horizontal ventilation, and the perimeter of the protruding ventilation vents in the substation with vertical ventilation.

  • numerical modelling of the natural ventilation of underground Transformer Substations
    Applied Thermal Engineering, 2013
    Co-Authors: Juan Carlos Ramos, Maximiliano Beiza, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract Ventilation by natural convection of two underground Transformer Substations has been numerically modelled. The model has been verified in terms of discretization errors and it has been validated with the experimental results of eight temperature rise tests carried out under different conditions of ventilation and Transformer power losses. The results of the simulations serve to analyse the air flow pattern and the air temperature distributions inside the substation. A correlation for the air mass flow rate as a function of the ventilation conditions (discharge coefficient and area of the grilles) and the heat dissipated by the Transformer has been fitted. The heat transfer coefficients on the surfaces of the Transformer and the walls of the enclosure can also be obtained from the simulations of the model. All this information will be used in a future paper to develop a zonal thermal model of the ventilation of the Substations that can be employed as a design and optimisation tool.

Juan Carlos Ramos - One of the best experts on this subject based on the ideXlab platform.

  • zonal thermal model of the ventilation of underground Transformer Substations development and parametric study
    Applied Thermal Engineering, 2014
    Co-Authors: Maximiliano Beiza, Juan Carlos Ramos, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract An algebraic thermal zonal model of the ventilation of underground Transformer Substations during a standardised temperature rise test is presented in this paper. The development and adjustment of the proposed model rely on the analysis of the air flow pattern and temperature distributions obtained by a more complex model numerically solved by means of CFD techniques. The flow domain of the model represents a section of the Substations divided into several interrelated zones where the mass and the energy conservation equations are formulated and the generated system of nonlinear algebraic equations is solved. The model is validated by comparing its results with the ones obtained by the CFD model and with the experimental results of eight temperature rise tests under different conditions. A parametric analysis was carried out on the model to prove its utility as an efficient tool to improve and optimise the thermal performance of Transformer Substations during the design process. From the parametric study it has been inferred that the main parameters affecting the ventilation of the Substations are the pass area between the LV–MV zone and the Transformer zone, the surface area of the ventilation grilles in the substation with horizontal ventilation, and the perimeter of the protruding ventilation vents in the substation with vertical ventilation.

  • numerical modelling of the natural ventilation of underground Transformer Substations
    Applied Thermal Engineering, 2013
    Co-Authors: Juan Carlos Ramos, Maximiliano Beiza, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract Ventilation by natural convection of two underground Transformer Substations has been numerically modelled. The model has been verified in terms of discretization errors and it has been validated with the experimental results of eight temperature rise tests carried out under different conditions of ventilation and Transformer power losses. The results of the simulations serve to analyse the air flow pattern and the air temperature distributions inside the substation. A correlation for the air mass flow rate as a function of the ventilation conditions (discharge coefficient and area of the grilles) and the heat dissipated by the Transformer has been fitted. The heat transfer coefficients on the surfaces of the Transformer and the walls of the enclosure can also be obtained from the simulations of the model. All this information will be used in a future paper to develop a zonal thermal model of the ventilation of the Substations that can be employed as a design and optimisation tool.

Carlos Mateo - One of the best experts on this subject based on the ideXlab platform.

  • optimal degree of smart Transformer Substations in distribution networks for reliability improvement
    IEEE PES Innovative Smart Grid Technologies Europe, 2012
    Co-Authors: Andrea Rodriguezcalvo, Pablo Frias, Javier Reneses, Carlos Mateo
    Abstract:

    The medium to low voltage Transformer substation is a key element in the distribution system. Therefore, smart Transformer Substations will play a crucial role in the evolution of distribution towards the smart grid. Smart Transformer Substations can provide a significant improvement of continuity of supply. However, a large investment is required, so the optimal degree of automation must be determined. The main objective of this paper is to quantify the impact of smart MV/LV Transformer Substations on continuity of supply, which is essential to determine the optimal automation degree. The analysis has considered different degrees of implementation of smart MV/LV Substations for different configuration schemes of urban distribution networks. Furthermore, sensitivity analyses have been performed for the main parameters involved so that conclusions on reliability improvement achieved by MV/LV Transformer substation automation can be scaled up.

  • ISGT Europe - Optimal degree of smart Transformer Substations in distribution networks for reliability improvement
    2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 2012
    Co-Authors: Andrea Rodriguez-calvo, Pablo Frias, Javier Reneses, Carlos Mateo
    Abstract:

    The medium to low voltage Transformer substation is a key element in the distribution system. Therefore, smart Transformer Substations will play a crucial role in the evolution of distribution towards the smart grid. Smart Transformer Substations can provide a significant improvement of continuity of supply. However, a large investment is required, so the optimal degree of automation must be determined. The main objective of this paper is to quantify the impact of smart MV/LV Transformer Substations on continuity of supply, which is essential to determine the optimal automation degree. The analysis has considered different degrees of implementation of smart MV/LV Substations for different configuration schemes of urban distribution networks. Furthermore, sensitivity analyses have been performed for the main parameters involved so that conclusions on reliability improvement achieved by MV/LV Transformer substation automation can be scaled up.

Jon Gastelurrutia - One of the best experts on this subject based on the ideXlab platform.

  • zonal thermal model of the ventilation of underground Transformer Substations development and parametric study
    Applied Thermal Engineering, 2014
    Co-Authors: Maximiliano Beiza, Juan Carlos Ramos, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract An algebraic thermal zonal model of the ventilation of underground Transformer Substations during a standardised temperature rise test is presented in this paper. The development and adjustment of the proposed model rely on the analysis of the air flow pattern and temperature distributions obtained by a more complex model numerically solved by means of CFD techniques. The flow domain of the model represents a section of the Substations divided into several interrelated zones where the mass and the energy conservation equations are formulated and the generated system of nonlinear algebraic equations is solved. The model is validated by comparing its results with the ones obtained by the CFD model and with the experimental results of eight temperature rise tests under different conditions. A parametric analysis was carried out on the model to prove its utility as an efficient tool to improve and optimise the thermal performance of Transformer Substations during the design process. From the parametric study it has been inferred that the main parameters affecting the ventilation of the Substations are the pass area between the LV–MV zone and the Transformer zone, the surface area of the ventilation grilles in the substation with horizontal ventilation, and the perimeter of the protruding ventilation vents in the substation with vertical ventilation.

  • numerical modelling of the natural ventilation of underground Transformer Substations
    Applied Thermal Engineering, 2013
    Co-Authors: Juan Carlos Ramos, Maximiliano Beiza, Alejandro Rivas, Raul Anton, Gorka S Larraona, Jon Gastelurrutia, Ivan De Miguel
    Abstract:

    Abstract Ventilation by natural convection of two underground Transformer Substations has been numerically modelled. The model has been verified in terms of discretization errors and it has been validated with the experimental results of eight temperature rise tests carried out under different conditions of ventilation and Transformer power losses. The results of the simulations serve to analyse the air flow pattern and the air temperature distributions inside the substation. A correlation for the air mass flow rate as a function of the ventilation conditions (discharge coefficient and area of the grilles) and the heat dissipated by the Transformer has been fitted. The heat transfer coefficients on the surfaces of the Transformer and the walls of the enclosure can also be obtained from the simulations of the model. All this information will be used in a future paper to develop a zonal thermal model of the ventilation of the Substations that can be employed as a design and optimisation tool.