PONE-D-20-26206

Particle Swarm Optimization Algorithm-Based PI Inverter Controller for Grid-Connected PV System

PLOS ONE

Dear Dr. Roslan,

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We look forward to receiving your revised manuscript.

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Long Wang, Ph.D.

Academic Editor

PLOS ONE

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Authors proposed the performance of a control strategy for an inverter in a three-phase grid-connected PV system. There are some concerns, as listed below.

1) The authors are recommended to highlight the novelty and contribution of the work.

2) The authors are recommended to highlight the advantages of their proposed method in comparison with conventional methods.

3) How the proposed method has improved the performance evaluation compared with JAYA algorithm [1]?

[1] Wang L, Huang C, Huang L. Parameter estimation of the soil water retention curve model with Jaya algorithm[J]. Computers and Electronics in Agriculture, 2018, 151: 349-353.

4) Authors should include references from 2019 to 2020.

Reviewer #2: Q.1 How to design an effective and efficient PI controller for a three-phase grid-connected inverter to obtain satisfied power quality performance is widely known research topics. Only the PI controller design for simulation model is not enough. Authors should be added new section that is experimental section if funds allow.

Q.2 In a grid-connected photovoltaic system, the frequency and the harmonics of voltage is determined by the larger grid, but power quality, stability and power mismatch can be improved by the three-phase grid-connected inverter, so the author needs to do some more jobs about power quality.

Q.3 This manuscript does not bring any new knowledge on evolutionary algorithm, so the innovations focus on novel applications. The evolutionary algorithm, such as BCEO ,PSO, should be implemented in the novel model in this manuscript, and the convergence process of PSO and BCEO should be shown in Fig.16.

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Reviewer #1: No

Reviewer #2: No

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Particle Swarm Optimization Algorithm-Based PI Inverter Controller for a Grid-Connected PV System

PONE-D-20-26206R1

Dear Dr. Roslan,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Long Wang, Ph.D.

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

**********

3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

**********

4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Good work! I'm very happy that all my concerns have been addressed.

Reviewer #2: The authors have made sufficient modifications according to the modification comments, and I suggest that this paper be accepted only if the following issues are improved.

Q.1 There are some errors in the manuscript, such as, in page 63, Table 2, Line Impedance should be Line resistance and XLg should be Xg.

Q.2 The convergence process of PSO and BCEO are compared in Fig.16, but the number of iterations should be the same in Fig.16.

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: No

Reviewer #2: No