Fractional-Order Load Frequency Control of an Interconnected Power System with a Hydrogen Energy-Storage Unit

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The authors introduced an LFC scheme for modern power systems grappling with frequency stability issues due to renewable resource integration. It employs a hydrogen-based energy-storage unit and FOPID controllers, demonstrating effectiveness in suppressing frequency fluctuations and robustness against disturbances in testing scenarios.

Here are some of the suggestions that can be considered for the paper:

1. The authors have applied improved gradient-based optimizer (IGBO) in this research. Does the authors have developed this algorithm? The authors should provide the conventional benchmark results for this developed algorithm. 

2. Comparative benchmark performance analysis for IGBO and other similar algorithms needs to be given in the paper. CEC test functions results are encouraged for this comment. 

3. How does the authors have considered the uncertainty involved in the renewable energy sources applied in this research? Proper analysis is required.

4. How the optimal parameters have been considered for the processing of the results with IGBO. 

5. Execution time of the proposed research needs to be included. 

6. Conclusion needs to be much clearer considering the important findings achieved from this research.

7. The authors should also focus on the practical implementation of the proposed research and its technical and economic limitations involved in adapting it in the society. 

Comments on the Quality of English Language

Minor editing required

Author Response

Thank you to the reviewer for their comments on our manuscript. We have responded to the reviewer's comments point by point. Please see the attachment for specific details.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

What is motivation of work i.e. what is challenge or drawback which you overcome 

Many advanced controllers are proposed recently like sliding mode control. Why PID is used then

Draw simple block diagram of the system

Please write voltage and power level for each block in Fig. 1

 

 

 

Comments on the Quality of English Language

Na

Author Response

Thank you to the reviewer for their comments on our manuscript. We have responded to the reviewer's comments point by point. Please see the attachment for specific details.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

 

The authors investigated a load frequency control scheme based on a hydrogen-based energy-storage unit and a parameter tuning strategy for fractional-order proportional-integral derivative controller. The considered problem in this paper is significant. interesting results are obtained in the paper. But there are still some questions that should be clarified. Here're some advice for revision:

1.     The background and motivation of research on fractional-order controller design for ; interconnected power system can be updated and more explained in Section I.

2.     The authors will update the comparison with other existing works in Table 1 to the corresponding current year.

3.     From the title of this paper, wind power system is the core. However, in this paper, the design process of fractional-order controller strategy and its advantages compared to other methods were not elaborated.

4.     How does the adopted improved Oustaloup's approximation algorithm, as referenced in [33], facilitate the approximation of the fractional-order operator within the specified frequency range? Could you elaborate on the construction of the transfer function, represented by zeros and poles, as outlined in the study?

5.     Expand on the numerical simulations, providing a more comprehensive analysis of the results.

 

6.     Could you elaborate on the specific tests conducted, particularly when the system's own inertia constant is reduced by 25% and 50%, and discuss the observed impact on the system's performance.

Comments on the Quality of English Language

Need to edit the English language.

Author Response

Thank you to the reviewer for their comments on our manuscript. We have responded to the reviewer's comments point by point. Please see the attachment for specific details.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Authors have done all the revisions correctly. My recommendation is to ACCEPT 

Author Response

Dear Reviewer,
    Thank you for your comments and suggestions on our manuscript. We appreciate your thorough review of our work. We are pleased to hear that you found our revisions to be satisfactory. Based on your recommendation to accept the manuscript, we are delighted to accept your suggestion. We believe that our research contributes significantly to the field and will be valuable to the readership.

    Once again, we appreciate your time and effort in reviewing our manuscript. Your feedback has been invaluable in improving the quality of our work. If you have any further comments or suggestions, please do not hesitate to let us know.
    Thank you once again for your support.

Reviewer 2 Report

Comments and Suggestions for Authors

I could not find power levels in Fig. 1. Please add after each block

Author Response

Please see the attachment.

Author Response File: Author Response.pdf