Harmonic Self-Compensation Control for Bidirectional Grid Tied Inverter Based on Crown Porcupine Optimization Algorithm

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The paper presents a self-compensating control strategy for harmonic parameters using the crown porcupine optimization algorithm to reduce the total harmonic distortion in bidirectional grid-tied converters. But there are still some issues with this paper as follows:
1. The literature review is insufficient and lacks a comparative analysis of existing methods.
2. The innovation is not clearly articulated. It is recommended to provide a specific description of the contributions in the introduction.
3. The literature review lacks depth and fails to justify the specific choice of the crown porcupine optimization algorithm.
4. Equation (12) as the cost function needs to clearly specify the constraints to be considered during the optimization process.
5. The analysis of algorithm convergence and time complexity is insufficient. Please evaluate the optimization capability and time overhead to demonstrate the algorithm's suitability for this scenario.
6. The simulation content is not comprehensive enough. It is recommended to include simulations under various conditions (e.g., load changes, grid faults) to thoroughly evaluate the effectiveness and robustness of the proposed control strategy.
7. The 15kW bidirectional converter results preliminarily validate the control method. More data, including various conditions and comparisons with other methods, are recommended to strengthen the experimental section.

Comments on the Quality of English Language

There are grammatical errors that need to be corrected.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

Dear authors,

 

You have submitted a paper which deals with a self-commutating control strategy for harmonic parameters based on the crown porcupine optimization algorithm to address the harmonic  problem. Several changes must be achieved before the paper it is published:

-First of all, the first sentence of the abstract is not very readable at all. I suggest dividing the sentence into shorter fragments. Besides you do not claim what the control strategy exactly achieves with harmonics . You should write with more technical rigor in a scientific paper.

-Lines 57-61. I have tried to access reference number 10 to verify the proposed quasi-PR schematic but no trace from this reference can be found. You have to cite papers that can be found in the literature, but not those which cannot. Besides, you must describe the scheme of quasi-PR

-Besides, there are other concepts of PR controllers that have not been cited in the introduction and you should at least mention them and try to compare with the quasi-PR concept. Below I suggest a paper which address several of these PR concepts:

M. Haro-Larrode, G. Bergna-Diaz, P. Eguia and M. Santos-Mugica, "On the Tuning of Fractional Order Resonant Controllers for a Voltage Source Converter in a Weak AC Grid Context," in IEEE Access, vol. 9, pp. 52741-52758, 2021, doi: 10.1109/ACCESS.2021.3069444.

-Section 2. As it can be deduced from the text and also the figures, you are analyzing an unbalanced situation of 2 phases instead of 3 of the inverter. Therefore, you must provide VUF and CUF indices for the readers to understand the degree of unbalance.

-Section 2. Better explain the off-grid mode.

-Section 3.1. Explain why you have selected a hybrid scheme with an outer loop based on PI control and the inner loop based on quasi-PR.

-Section 3.3. Explain the reasons behind the selection of crown porcupine optimization algorithm among a vast set of bio- or IA- inspired algorithms. You must introduce the reasons behind this decision over other algorithms before applying it.

-Section 4, 4.1 and 4.2.  You must improve the presentation of simulation and experimental setup parameters. Better in a table and with no missing parameters such as R1 and R2.

-AC grid model. It seems that the AC grid model is just a Thevenin equivalent but you need to describe it.

-Conclusions and overall comment. By reading the manuscript it is complicated for the reader to detect the gap you should be covering in the literature. You must improve the description of the gap in the literature your paper is covering.

 

Kind regards

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

First time a term appears in the text it must be explained even there are very common in the field of the paper (for example, PI, QPR, LCL in Abstract, THD in Introduction). The references for the Introduction might be updated (only 2 references from the last 5 years). Each component from Fig. 1 and each block from Fig. 2 must be explained. I have some comment for the next figures where a block appears for the first time. Fig. 7 and Fig. 8 are parts of chapter 4 of simulations and experimental determinations. They should be moved down the page and included in this section. Also, Fig. 10 must be place in section 4.2. General rule, present an imagine in the same area of the page with the image itself (Fig. 11 and fig. 12). Conclusion part might also extend. The authors do not respect the paper temple and there is no indication about each author contribution.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The authors have addressed the previously raised questions.

Reviewer 2 Report

Comments and Suggestions for Authors

Dear authors,

 

You have somehow followed the recommendations.

The paper is ready to be published.

 

Kind regards