Journal of Applied Research in Electrical Engineering

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Document Type : Research article

Authors

Electrical Engineering Department, Faculty of Engineering, Bu-Ali Sina University, Hamedan 6516738695, Iran

https://doi.org/10.22055/jaree.2022.39484.1041

Abstract

With the presence of distributed energy resources in the microgrid, the problem of load-frequency control (LFC) becomes one of the most important concerns. With changing the parameters of the microgrid components as well as the disturbances forced to the grid, designing a suitable LFC becomes more difficult. In this paper, the design of a Robust model predictive controller (RMPC) based on the linear matrix inequality as a secondary controller LFC system is discussed for controlling a microgrid on the shipboard. The main purpose of the proposed method is to improve the frequency stability of the microgrid in the presence of disturbances and the uncertainty of its parameters. The proposed controller simulation results, in several different scenarios, considering The uncertainty of the microgrid parameters as well as the input disturbances are compared. The main controllers are the fuzzy proportional-integral type1 and 2, and multi-objective multi-purpose functions optimized with the MOFPI (MBBHA), MOIT2FPI (MBHA) algorithm. The effectiveness of the proposed method in terms of The response speed and reduction of fluctuations and overcome uncertainties of the parameters, as well as robustness to disturbances, are discussed. Simulation is implemented in MATLAB software. The proposed method reduces the frequency oscillations caused by disturbances on the microgrid by 68% (68% improvement over other methods used in this field). Also, using this method, the damping speed of microgrid frequency fluctuations is increased by 53% (performance improvement).

Highlights

The design of a Robust Model Predictive Controller (RMPC) based on the linear matrix inequality.
Improves the performance of the model predictive controller against parameter uncertainty and disturbance.
Reduces the frequency deviations caused by disturbances on the islanded microgrid.
Increases the damping speed related to frequency fluctuations.

Keywords

Main Subjects

References

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Journal of Applied Research in Electrical Engineering

Volume 1, Issue 2
Summer and Autumn 2022
July 2022
Pages 175-185

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History

Receive Date: 17 December 2021
Revise Date: 27 February 2022
Accept Date: 02 March 2022

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