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Impact of Passive-Components’ Models on the Stability Assessment of Inverter-Dominated Power Grids

Author

Listed:
  • Davide del Giudice

    (DEIB, Politecnico di Milano, 20133 Milan, Italy)

  • Federico Bizzarri

    (DEIB, Politecnico di Milano, 20133 Milan, Italy
    Advanced Research Center on Electronic Systems for Information and Communication Technologies E. De Castro (ARCES), University of Bologna, 40126 Bologna, Italy)

  • Samuele Grillo

    (DEIB, Politecnico di Milano, 20133 Milan, Italy)

  • Daniele Linaro

    (DEIB, Politecnico di Milano, 20133 Milan, Italy)

  • Angelo Maurizio Brambilla

    (DEIB, Politecnico di Milano, 20133 Milan, Italy)

Abstract

Power systems are experiencing some profound changes, which are posing new challenges in many different ways. One of the most significant of such challenges is the increasing presence of inverter-based resources ( ibr s), both as loads and generators. This calls for new approaches and a wide reconsideration of the most commonly established practices in almost all the levels of power systems’ analysis, operation, and planning. This paper focuses specifically on the impacts on stability analyses of the numerical models of power system passive components (e.g., lines, transformers, along with their on-load tap changers). Traditionally, loads have been modelled as constant power loads, being this both a conservative option for what concerns stability results and a computationally convenient simplification. However, compared to their counterparts above, in some operating conditions ibr s can effectively be considered real constant power loads, whose behaviour is much more complex in terms of the equivalent impedance seen by the network. This has an impact on the way passive network components should be modelled to attain results and conclusions consistent with the real power system behaviour. In this paper, we investigate these issues on the ieee14 bus test network. To begin with, we assess the effects of constant-power and constant-impedance load models. Then, we replace a transmission line with a dc line connected to the network through two modular multilevel converters ( mmc s), which account for the presence of ibr s in modern grids. Lastly, we analyse how and to which extent inaccurate modelling of mmc s and other passive components can lead to wrong stability analyses and transient simulations.

Suggested Citation

  • Davide del Giudice & Federico Bizzarri & Samuele Grillo & Daniele Linaro & Angelo Maurizio Brambilla, 2022. "Impact of Passive-Components’ Models on the Stability Assessment of Inverter-Dominated Power Grids," Energies, MDPI, vol. 15(17), pages 1-23, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6348-:d:902568
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    References listed on IDEAS

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