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An adaptive coordination control solution to boost frequency stability for a hybrid distributed generation system.

Hossam S Salama1, Gaber Magdy2, Abualkasim Bakeer1

  • 1Electrical Engineering Department, Faculty of Engineering, Aswan University, Aswan, Egypt.

Plos One
|May 13, 2025
PubMed
Summary

This study introduces an adaptive control strategy for hybrid systems to enhance frequency stability. It optimizes renewable energy use for hydrogen production, improving grid reliability.

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Area of Science:

  • Electrical Engineering
  • Renewable Energy Systems
  • Control Systems

Background:

  • Growing reliance on renewable energy sources (RESs) in hybrid distributed generation systems (HDGSs) challenges grid frequency stability (FS).
  • Effective coordination of RESs is crucial for maintaining reliable power supply and grid integrity.
  • Unpredictable RES generation necessitates advanced control strategies to manage fluctuations.

Purpose of the Study:

  • To propose an adaptive coordination control (ACC) strategy for enhancing frequency stability in HDGSs.
  • To integrate renewable energy sources, fuel cells (FCs), and aqua electrolyzers (AE) for hydrogen production and energy storage.
  • To dynamically manage the energy flow from RESs to AE based on real-time frequency deviations.

Main Methods:

  • Development of an ACC solution utilizing fuzzy control to adjust the energy ratio (Kn) allocated to AE.
  • Modeling of an HDGS comprising photovoltaic (PV) plants, wind turbines (WT), AE-FC systems, energy storage systems (ESS), and diesel generators (DG).
  • Simulation and analysis of the proposed ACC under various load conditions, comparing its performance against fixed-Kn strategies.

Main Results:

  • The ACC strategy effectively improved frequency stability in the HDGS by dynamically adjusting energy allocation.
  • Optimized utilization of surplus RES energy for hydrogen production via AE and storage in FCs.
  • Demonstrated superior performance of the adaptive approach over fixed-ratio methods in damping frequency variations.

Conclusions:

  • The proposed ACC solution offers a robust method for enhancing frequency stability in RES-integrated HDGSs.
  • Dynamic energy management is key to maximizing RES benefits while ensuring grid reliability.
  • This approach provides a viable strategy for integrating intermittent renewables and improving energy storage capabilities.