Multi-objective Optimization of Wind Turbines Participation in Primary Frequency Control of ‎Power systems

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Document Type : Original Article

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Department of Electrical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran

Abstract

During disturbances in the power system, the frequency deviates from its nominal value. The increased penetration of renewable ‎generations raises concerns about reducing system inertia and the system's capability to maintain frequency within an appropriate range. ‎In this paper, to enhance the participation of wind power plants based on variable speed generators in frequency control and in ‎coordination with thermal power plants, the parameters of the coordinated participation control system between wind turbines and ‎synchronous generator-based power plants are optimized. In tuning the control parameters, the NSGA-II algorithm is used to minimize ‎the frequency nadir and the rate of change of frequency (RoCoF) in the post-fault period. Simulation results of two test systems (the ‎single bus and Kundur two-area) show that the proposed scheme improves the frequency response characteristics of the system. ‎Specifically, it reduces the RoCoF, thereby preventing the unwanted operation of under-frequency-load-shedding relays. Additionally, ‎increasing the frequency nadir prevents the unwanted operation of frequency relays. Furthermore, the proposed method significantly ‎reduces the settling time of the system's frequency response.‎

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Tabriz Journal of Electrical Engineering

Articles in Press, Corrected Proof
Available Online from 08 June 2025

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