Power Factor Analysis of Grid-Connected Solar Inverter under Different Irradiance Levels throughout the Day

Comments 1:It is recommended to reduce similarities and avoid plagiarism

Response 1:Thank you for pointing this out. In the article, the similarity index is reduced to below 19%.

Comments 2: The manuscript is presented that lack of a construction of a cohesive and logical scientific flow.

Response 2: We thank this comment from the Reviewer for enhancing the quality of our manuscript. The necessary additions and edits have been made to ensure a consistent and logical scientific flow in the article.

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4. Response to Comments on the Quality of English Language

Point 1: Moderate editing of English language required

Response 1:The manuscript was sent to the proficiency department then it was revised and corrected as professional.

5. Additional clarifications

Comments 1:It is recommended to reduce similarities and avoid plagiarism

Response 1:Thank you for pointing this out. In the article, the similarity index is reduced to below 19%.

Comments 2: The manuscript is presented that lack of a construction of a cohesive and logical scientific flow.

Response 2: We thank this comment from the Reviewer for enhancing the quality of our manuscript. The necessary additions and edits have been made to ensure a consistent and logical scientific flow in the article.

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4. Response to Comments on the Quality of English Language

Point 1: Moderate editing of English language required

Response 1:The manuscript was sent to the proficiency department then it was revised and corrected as professional.

Comments 1:  Formulas 1 and 2 are written incorrectly.

Response 1: We thank this comment from the Reviewer for enhancing the quality of our manuscript.

Eliminating harmonic components using R-L filters is crucial for maintaining power quality, ensuring regulatory compliance, and enhancing the overall performance and reliability of solar PV systems.

With the R-L filter used in Figure 3, harmonic components are largely eliminated.

After the elımınatıon of harmonıc components, ıt ıs possıble to use the formulas we can use ın sınusoidal circuits.

Comments 2: Lines 69: It is not clear what the authors wanted to say... Why is it necessary to maintain reactive power in networks? To absorb reactive power, the inverter must operate in active rectifier mode. This is a completely different device... Have you thought about how much the cost of electricity will be?

Response 2:  Thank you so much for the comment sir. (Lines 69) that caused misunderstandings in solar photovoltaic systems has been removed from the article.

Comments 3: Figures 1-3: What is the point of them? They are all schematic images, there are many similar drawings in the public domain.

Response 3: We thank this comment from the Reviewer for enhancing the quality of our manuscript.

Schematic images play a crucial role in the successful implementation and management of solar photovoltaic systems. Additionally, They provide a clear visual representation of the system layout, making it easier to understand complex interconnections and components.

Figure 1-3 help facilitate communication among engineers, installers, and stakeholders by providing a common reference point, and this Figures have been added for a better understanding of the grid- tied solar system.

Comments 4: There is no information about the type, generated power and passport data of the panel. How did you model and study.?

Response 4: We thank this comment from the Reviewer for enhancing the quality of our manuscript. The PV cell single diode equivalent circuit is given in Figure 1.

Additionally, the specifications of the solar panel used in Figure 3 are given in Table 1.

The properties of the array used in Figure 3 are given below:

a)Number of cells per module 96

b)Number of series-connected  modules per string (Ns=5).

c) Number of parallel strings (Np=66).

Comments 5: What is the topology of the DC/AC inverter? power? control algorithms? and others..

Response 5: Thanks for your appreciation.

The topology of the DC/AC inverter is given below Figure 2.

Comments 6: What network does the solar panels feed, what consumers are in this network?

Response 6 Thank you for pointing this out. The grid loads used in the grid-connected PV solar system are given above Figure 2.

Comments 7: In the abstract, the authors talk about modeling in Matlab / Simulink. Where is the model? mathematical description? modeling conditions and assumptions? initial parameters of the model?

Response 7: Thank you for pointing this out. I agree.  We have been added the parameter values below Figure 3.  in manuscript.

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Comments 8: Figure 3: cosφ=0.9643 at the inverter output before the inductor (RL)? Are these fundamental harmonic measurements? What about taking into account inverter distortion?

Response 8: The measured power coefficient in PV solar system belongs to the inverter output.

The R-L filters were used to filter harmonic components in grid-tied solar system (Fiure.3).

Sinusoidal formulas can be used after harmonic components are eliminated with the R-L filter.

Comments 9: I have the opinion that the authors of the text of the article confuse and replace two parameters “power factor (PF)” and “cosφ”. This is only allowed on sinusoidal networks. But this is not your case.

Response 9: We thank this comment from the Reviewer for enhancing the quality of our manuscript.

R-L filters play a crucial role in solar PV systems by effectively eliminating harmonic components, improving power quality, and ensuring compliance with grid standards. Their implementation contributes to the stability and efficiency of solar energy systems. With the R-L filter used in Figure 3, harmonic components are largely eliminated. We can then use the formulas used in sinusoidal circuits.

Comments 10: There are still a large number of comments on the content, but they do not make sense until the main points are corrected: power calculation, “power factor (PF)” and “cosφ” parameters.

Response 10: Thank you for pointing this out. With the R-L filter used in Figure 3, harmonic components are largely eliminated. Once harmonic components are eliminated, we can use the formulas we use in sinusoidal circuits..

Comments 1: It is recommended to further clarify the references to ensure the rigor of the research design.

Response 1: Thank you for pointing this out. The references were clarified further and the necessary changes were made. References 42 and 43 have been removed

Comments 2:  At the same time, the detailed description of the method and result part is added to enhance the transparency and repeatability of the paper.

Response 2: Thank you for pointing this out. Explanations of the method has been added to the introduction of the Appendix- A. in artical.

In addition,  explanations have been added above and below equation (3).

 These revision is highlighted in the article.

Comments 3: Finally, ensure that the conclusions are closely linked to the results and clearly demonstrate the contribution of the research.

Response 2: We thank this comment from the Reviewer for enhancing the quality of our manuscript. The contributions of the research are expressed by expanding the conclusion section. This revision is highlighted in the article.

Response to Reviewer Comments

1. Summary

Thank you very much for taking the time to review this manuscript. Please find the detailed responses below and the corresponding revisions/corrections highlighted/in track changes in the re-submitted files.

2. Questions for General Evaluation

Reviewer’s Evaluation

Response and Revisions

Does the introduction provide sufficient background and include all relevant references?

Must be improved

Thank you for pointing this out . The introduction has been expanded to clearly state the purpose and importance of our work.

This revision is highlighted in the manuscript.

Are all the cited references relevant to the research?

Must be improved

We thank this comment from the Reviewer for enhancing the quality of our manuscript.

In the article, the references were re-examined and some references were changed.

 References 42 and 43 have been removed.

Is the research design appropriate?

Must be improved

We thank this comment from the Reviewer for enhancing the quality of our manuscript. Finding the Analytical Expression between Solar Irradiation and Power Factor In Grid-Connected Solar System Using The Curve Fitting Method

Appendix- A. curve fitting method is explained.

Curve fitting offers several advantages:

a)      Provides estimates for parameters that can help in understanding the underlying process.

b)     Aims to minimize the difference between observed data and model predictions, improving accuracy.

c)      Facilitates statistical analysis and hypothesis testing regarding the relationships among variables.

d)     Informs decisions based on empirical data analysis and model predictions.

This revision is highlighted in the manuscript.

Are the methods adequately described?

Must be improved

The authors thank the constructive feedback from                 the Reviewer. Explanations have been added to the introduction of the Appendix- A.

In addition, revisions have been made above and below Equation 3.

This revision is highlighted in the manuscript.

Are the results clearly presented?

Must be improved

Thank you so much for the comment sir.

In the article, equation (4) is an analytical expression where the result is clearly presented.

Are the conclusions supported by the results?

Must be improved

We thank this comment from the Reviewer for enhancing the quality of our manuscript.  A strong results section can lead to more impactful discussions about the implications of our findings.

The conclusion of the article is strengthened by strong results. This revision is highlighted in the manuscript.Formun ÜstüFormun Altı

5. Additional clarifications

Dear Editor,

Thank you for allowing me to submit a revised draft of my manuscript titled “ Power Factor Analysis of Grid-Connected Solar   Inverter  Under Different Irradiance Levels Throughout The Day”  We appreciate the time and effort you and the reviewers have dedicated to providing your valuable feedback on my manuscript. Likewise, we are grateful to the reviewers for their insightful comments on this paper. We have incorporated the changes to reflect most of the suggestions provided by the reviewers.