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Distributed Renewable Power Sources in Weak Grids -- Analysis and Control

In: Renewable Energy - Utilisation and System Integration

Author

Listed:
  • Jean Patric Da Costa
  • Everton Luiz De Aguiar
  • Emerson Giovani Carati
  • Carlos Marcelo De Oliveira Stein
  • Rafael Cardoso

Abstract

This chapter describes the main aspects about distributed generation (DG) systems and investigates the operation of DG systems based on static power converters connected to weak grids. Initially, the concept of DG is discussed, and the main topologies for the connection of DG systems to the grid are covered. Converters used in such applications are also introduced. When connected to weak grids, DG systems based on static power converters suffer with problems related to the total harmonic distortion (THD) at the connection point. To address this issue, initially, a definition of weak grid is presented. Then, the dynamic behaviour of the most common small DG system when connected to a weak grid and the relation between the voltage harmonic distortion and the weak grid impedance are analyzed. Aiming to comply with the THD requirements, the main topologies of passive filter used in the connection of inverter-based DG units with weak grids are also discussed. Finally, a controller design that considers the grid side impedance in its formulation is developed. Experimental results are provided to support the theoretical analysis and to illustrate the performance of the grid-connected DG in a weak grid case operation scenario.

Suggested Citation

  • Jean Patric Da Costa & Everton Luiz De Aguiar & Emerson Giovani Carati & Carlos Marcelo De Oliveira Stein & Rafael Cardoso, 2016. "Distributed Renewable Power Sources in Weak Grids -- Analysis and Control," Chapters, in: Wenping Cao & Yihua Hu (ed.), Renewable Energy - Utilisation and System Integration, IntechOpen.
    • Handle: RePEc:ito:pchaps:97338
    DOI: 10.5772/61613
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    Cited by:

    1. Saranchimeg, Sainbold & Nair, Nirmal K.C., 2021. "A novel framework for integration analysis of large-scale photovoltaic plants into weak grids," Applied Energy, Elsevier, vol. 282(PA).

    More about this item

    Keywords

    DG connection; DG models; Harmonic distortion; Weak grids;
    All these keywords.

    JEL classification:

    • Q20 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - General
    • Q40 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - General

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