A Robust Controller Design based on Kharitonov’s Theorem for Frequency Control in an Interconnected Power System

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  •   Beheshteh Raouf

  •   Seyedamirabbas Mousavian

Abstract

The load frequency control of power systems is often carried out using methods that are dependent on the system load and parameters. Therefore, the controller design is not robust in unforeseen cases such an attack on the power system, variations in system parameters, or changes in load. In such methods, there is a need for an attack detection tool, and moreover, the controller parameters need to be adjusted as the load and power system parameters change. In this paper, Kharitonov's theorem was applied to design a robust decentralized load frequency control for a two-area power system in the presence of electric vehicle fleets as a power source that were targeted by a cyberattack. Furthermore, the robustness of the system against system nonlinearities was demonstrated by testing the efficacy of the controller on both linear and nonlinear systems. The controller design was robust such that there was no need to change the gains of the controller even during an attack. This was compared with the performance of controllers designed using GWO algorithm and fuzzy logic that needed retuning for different case studies with different variations in system parameters, load, or inclusion of a cyberattack to the electric vehicle fleets.

Keywords: Electrical Vehicles (EVs), Load Frequency Control (LFC), Kharitonov’s Theorem.

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How to Cite
[1]
Raouf, B. and Mousavian, S. 2023. A Robust Controller Design based on Kharitonov’s Theorem for Frequency Control in an Interconnected Power System. European Journal of Electrical Engineering and Computer Science. 7, 1 (Jan. 2023), 1–9. DOI:https://doi.org/10.24018/ejece.2023.7.1.482.