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Class Energy Electric Systems I

  • Presentation

    Presentation

    This curricular unit aims to provide students with basic skills to understand the structure of an electrical power system in its components of eletricity production, transmission and distribution, to establish the mathematical model of the electrical energy system in steady-state, to apply the linear load flow model (DC model) and the underlying technical analysis of results.
  • Code

    Code

    ULP732-10366
  • Syllabus

    Syllabus

    Review of symmetrical balanced three-phase systems Introduction to electrical power systems Historical evolution; Electric power sources; Structure, components, requirements, nomenclature, voltage levels and topological structure; Alternating current and direct current power transmission; The Portuguese electrical network. Per unit system Definitions; Base units; Mathematical formulation of the fundamental laws of electrical energy systems in per unit. Load flow analysis Mathematical model; Systems with n busbars; Bus types; Classification of variables. Power transmission line Short, medium, and long line models; Thermal, static and voltage stability limits. Load diagrams Valley load factor, load factor, capacity factor; Simultaneity and diversity factors; Load duration curve.
  • Objectives

    Objectives

    To characterize the electrical power system in terms of its structure, components, requirements and single-line diagram. To know the structure of electrical networks in general, particularly, the Portuguese electrical network; To use the "per unit" system to solve network analysis problems; To establish the model of an electrical network and formulate, from a mathematical point of view, the load flow problem; To apply the linear model to solve load flow problems; To compute the electrical parameters of the different types of lines and establish the respective model in steady-state: the exact model, the equivalent pi model, and the short-line model; To understand the concepts of transport capacity, thermal limit, static stability limit, and voltage stability limit; To numerically characterize load diagrams; To acquire the ability to analyze results and draw technical conclusions.
  • Teaching methodologies and assessment

    Teaching methodologies and assessment

      Audiovisual materials will be used to demonstrate the operation of various equipment in Electrical Power Systems.
  • References

    References

    Vítor Meireles, Circuitos Eléctricos, 5ª edição, LIDEL - Edições Técnicas, LDA, 2009, ISBN: 9789727575862  
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