Modeling an Electrolyzer in a Graph-Based Framework

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

I rate the article highly because it addresses the essential challenges of modelling the operation of multi-fuel solutions, including electrolyzers, in the context of energy transformation and increasing the operational flexibility of alternative systems to those based on fossil fuels while neutralizing the limitations related to weather dependant sources variability and limited controllability of renewable energy sources. In terms of science, the article meets the requirements. I positively evaluate the presentation of the proposed system and the rigour in formulating conclusions.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

In this paper, we propose an electrolyzer model for steady-state power flow analysis of multi-carrier energy networks, which can produce hydrogen and heat, deduce the boundary conditions that make the problem appropriate, and verify it numerically. Here are some of my questions：

1.In addition to the fixed and non-fixed gas-heat output ratios mentioned in the article, should more practical scenarios be considered?

2.In the derivation of boundary conditions, some assumptions are made, such as the electrical network is an AC system, the gas network is a low-pressure system, and the thermal network is a closed-loop system. These assumptions simplify the problem to some extent, but there can be a number of different configurations and operating conditions for the actual energy network.

3.This paper emphasizes the role of electrolyzers in preventing the instability of the energy system, but the specific mechanism and degree of its impact on the stability of the energy system under different operating conditions are not analyzed in depth.

4.Although the effectiveness of the model under specific conditions is verified by numerical experiments, there is a lack of comparison and verification with the actual operating energy system data.

5.In this paper, the authors introduce the linear models of the electrolytic cell. The model is applied to the analysis of steady-state load flow in multi-carrier subgrids. To prevent the instability of the energy system by using electrolytic cells. You can compare and analyze different models to show your strengths. Please refer to the following article:

[a]IEEE Transactions on Industrial Informatics, DOI: 10.1109/TII.2024.3390595

[b] IEEE Transactions on Industry Applications, vol. 60, no. 3, pp. 4482-4493, May-June 2024

Author Response

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Reviewer 3 Report

Comments and Suggestions for Authors

The paper presents a study on Modelling an electrolyser in a graph-based framework, the paper fits the scope of the journal, the study is interesting and of great importance, here are my comments:

- Add a highlight section where you mention your main findings and papers contribution.

- Add a literature review section and use more relevant recent references

- Add a results discussion section and use more recent relevant references

- Add a compression table between your approach and findings agains the recent literature approach and findings

- Add limitation and future works

- Descrive your approach and present your results in a clearer way

- Add DOI to all references for easy locating

Author Response

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Round 2

Reviewer 3 Report

Comments and Suggestions for Authors

The paper has been revised. One important comment is you have to add specific numerical results in your abstract And conclusion. Your abstract need to be more comprehensive and appealing to reader and not only general  headlines.

Author Response

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Author Response File: Author Response.pdf