Exploitation of an Industrial Low-Bandwidth Communication Line for Modulation-Level Synchronization of Voltage Source Converters
Round 1
Reviewer 1 Report
The main contribution should be explained in more detail in introduction section.
Check title of figure 1.
The algorithm in Figure 3 should be explained in detail.
Some parameters used in this paper should be described.
The conclusions should be extended with more future work.
Author Response
Dear Reviewer,
after paying careful attention to your comments about the paper titled “Exploitation of an industrial low-bandwidth communication line for modulation-level synchronization of voltage source converters”, your recommendations have been included in the new version of the paper. All the changes in the paper have been written in blue. The paper has significantly improved because of your comments and recommendations, which we found all valuable.
The main contribution should be explained in more detail in introduction section.
The final part of the introduction section has been revised and expanded in order to explain better the main contribution of the paper.
Check title of figure 1.
The caption of Fig. 1 and the related text has been revised for clarity. Moreover, an additional figure has been added showing the physical experimental setup.
The algorithm in Figure 3 should be explained in detail.
Fig. 3 (now Fig. 4) has been edited for clearer understanding, and the explanation of the algorithm has been expanded.
Some parameters used in this paper should be described.
The values of the parameters used in Section 2.2 have been given for a pair of converters. Also, Fig. 5 was added to show the method used to obtain statistics about the realignment times.
Reviewer 2 Report
The article is interesting and well-written and the content is technically relevant. I would like you to address the following comments:
1- In the abstract (line#6), the subject "we" is not acceptable for academic writing. You may use a passive sentence instead.
2- The introduction has a typo "ad" (Line#35).
3- The test circuit topology shown in Figure 1 needs more explanation.
4- The proposed methods should be compared with previous relevant works to elaborate the benefit of the proposed methods.
5- The results need more discussion and elaboration. Also, the experimental setup should be shown in the paper.
6- In Tables 1 and 2, what do you mean by "units under test" and "2-->1,3-->1, and 3-->2"?
Author Response
Dear Reviewer,
after paying careful attention to your comments about the paper titled “Exploitation of an industrial low-bandwidth communication line for modulation-level synchronization of voltage source converters”, your recommendations have been included in the new version of the paper. All the changes in the paper have been written in blue. The paper has significantly improved because of your comments and recommendations, which we found all valuable.
The article is interesting and well-written and the content is technically relevant. I would like you to address the following comments:
1- In the abstract (line#6), the subject "we" is not acceptable for academic writing. You may use a passive sentence instead.
“We” has been replaced with “the authors”.
2- The introduction has a typo "ad" (Line#35).
The typo has been corrected. Thanks for spotting it.
3- The test circuit topology shown in Figure 1 needs more explanation.
The caption of Fig. 1 and the related text have been revised for clarity. An additional figure (Fig. 2) was added showing a picture of the experimental setup.
4- The proposed methods should be compared with previous relevant works to elaborate the benefit of the proposed methods.
As far as we know, all previous attempts at parallelizing power converters have used filters in order to keep the recirculating current under control. What we propose is the complete removal of any filter, so that a working parallel converter will be truly modular, composed only of the sum of the parallelized converters. We added text to the introduction to explain that all of the reviewed techniques rely on some kind of filter between the parallelized converters, while we propose to use only the stray inductance and resistance of the wiring.
5- The results need more discussion and elaboration. Also, the experimental setup should be shown in the paper.
We added a picture of the experimental setup (Fig. 2) and an oscilloscope screenshot relative to the determination of realignment time statistics (Fig. 5). We also expanded the discussion of the two proposed synchronization methods and of their results.
6- In Tables 1 and 2, what do you mean by "units under test" and "2-->1,3-->1, and 3-->2"?
Alignment tests and synchronization experiments were done between pairs of units. 2 à 1 in a table refers to alignment tests between units 1 and 2, etc. Thanks to your remark we added text to better explain the tables and the test setup.
Reviewer 3 Report
Authors shows quite interesting design of using CAN bus to synchronize control signals. However few illustration photos should be implemented.
In Abstract you write : "This technique relies on the natural parasitic inductance and resistance of the wiring among parallel units." I can not find any mention in main text about it.
Refererences should not be older than 10 years
Author Response
Dear Reviewer,
after paying careful attention to your comments about the paper titled “Exploitation of an industrial low-bandwidth communication line for modulation-level synchronization of voltage source converters”, your recommendations have been included in the new version of the paper. All the changes in the paper have been written in blue. The paper has significantly improved because of your comments and recommendations, which we found all valuable.
Authors shows quite interesting design of using CAN bus to synchronize control signals. However few illustration photos should be implemented.
Fig. 2 has been added to show the experimental setup, and Fig. 5 has been added showing an oscilloscope screenshot relative to the determination of realignment time statistics.
In Abstract you write : "This technique relies on the natural parasitic inductance and resistance of the wiring among parallel units." I can not find any mention in main text about it.
Thanks for your remark. The text has been added to the introduction section.
Refererences should not be older than 10 years.
Several of the older references have been removed or replaced with newer ones.
Round 2
Reviewer 1 Report
The authors have improved the article according to the recommendations. The article can be accepted for publication.
Author Response
Dear Reviewer,
thanks for your time and for your help in improving the quality of out manuscript.
Best regards,
the authors.
Reviewer 2 Report
The authors have answered all comments. Thanks
Author Response
Dear Reviewer,
thanks for your time and for your help in improving the quality of out manuscript.
Best regards,
the authors.
