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Licensed Unlicensed Requires Authentication Published by De Gruyter October 26, 2020

Frequency regulation of a weakly connected microgrid using the fuzzy-PID controller

  • Meriem Nachidi ORCID logo EMAIL logo


Microgrid system stability is a major source of concern due to the rapid increase in load demand and a high level of renewable energy penetration. During the grid- connected mode, the microgrid power quality is mainly affected by the level of connection strength with the host grid. Thus, this paper aims to investigate the impact of the implemented control strategy in the microgrid, on frequency response when its level of connection strength is weak, that is, the frequency and voltage are not dominantly controlled by the grid. A control scheme based on a fuzzy logic-based self-tuning PID controller (fuzzy-PID) is used to maintain the frequency within the acceptable range. Simulations illustrate that the frequency dynamic response of the microgrid guarantees a good performance using the fuzzy-PID controller despite a large drop in grid inertia and the presence of disturbances whereas the classical PID controller cannot maintain the frequency within the acceptable range.

Corresponding author: Meriem Nachidi, Icam, Paris-Sénart Site, Lieusaint, 77127 France; University of Picardie Jules Verne, MIS Lab, Amiens, 80000 France, E-mail:

  1. Author contribution: Author has accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: Author declares no conflicts of interest regarding this article.


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Received: 2020-07-21
Accepted: 2020-10-02
Published Online: 2020-10-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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