Optimization of construction cost and magnetic fields of underground powerlines

• Autores: Víctor Julián Hernández Jiménez
• Directores de la Tesis: Edgardo D. Castronuovo (dir. tes.)
• Lectura: En la Universidad Carlos III de Madrid ( España ) en 2016
• Idioma: español
• Tribunal Calificador de la Tesis: Renato Rizzi (presid.), Hortensia Amaris (secret.), Pablo Martín Muñoz (voc.)
• Materias:
  • Ciencias tecnológicas
    • Tecnología de la construcción
• Enlaces
  • Tesis en acceso abierto en: e-Archivo
• Resumen

  • For several reasons, including environmental, security and land occupation restrictions, underground power cables are intensively used, especially for transmission of electric energy in urban areas. The current flowing through these cables generates magnetic fields. Nevertheless, exposure to magnetic fields is restricted for providing protection of population against possible health effects. This thesis focuses on two important aspects for society: the limitations of magnetic fields generated by underground electrical grids and the reduction in the construction cost, when allocating underground cables.

    This work proposes several methods for the minimization of construction costs, constraining the magnetic fields generated by multi-circuit underground power lines to the limits settled by legislation. As the limits for magnetic fields are not the same in all countries and regions, different stringent constraints are considered in the study. Magnetic fields depend on electrical currents flowing through circuits and, as demand, production and even the grid configuration change, they vary along time. This thesis proposes new statistic optimization methods, considering temporal variations in the electrical currents for the calculation of the cable bundles optimal disposition. Cables can be buried or installed in galleries. Thus, in this work, a new method for the optimization of gallery dimensions and cables disposition within the gallery is also developed.

    Proposed optimization methods have been tested using real data and installations. The results show that very low, almost negligible, values of magnetic field can be achieved, when adopting the adequate disposition of cables. In addition, that statistic approach is essential for obtaining optimal solutions when dealing with time-varying currents.