Small-Signal Modeling of Grid-Forming Wind Turbines in Active Power and DC Voltage Control Timescale
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsOverall the paper has good analysis. Here are few of the comments:
1. A line can be added to abstract, regarding the simulation tools used for this proposed model.
2. Is this sentence correct? "Based on the system control configuration and the assumptions in Section II, Figure.3 illustrates the dynamics diagram of a GFM-WT in APC and DVC joint timescale."
3. The references made to fig 2, 3 are not clear
4. Section 4. The sentence needs correction. “The system is instability at J=4.”
5. Can the values be added for J=2, 10-16 to table 2 and for KI1 = 20, 200 to table 3?
6. What computational methods are used to calculate eigenvalues?
7. What are the limitations observed using small-signal stability analysis for the proposed model?
Author Response
Comments 1: A line can be added to abstract, regarding the simulation tools used for this proposed model. |
Response 1: Thanks for your the kind consideration. We agree with this comment. Therefore, we have added the description of simulation tools in Abstract. |
Comments 2: Is this sentence correct? "Based on the system control configuration and the assumptions in Section II, Figure.3 illustrates the dynamics diagram of a GFM-WT in APC and DVC joint timescale." |
Response 2: This is not correct sentence. I have already changed it to the correct description in section 2.1.
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Comments 3: The references made to fig 2, 3 are not clear |
Response 3: Thank you for your significant reminding. According to your suggestion, I have checked all the references related to fig 2, 3 and corrected the related references. |
Comments 4: Section 4. The sentence needs correction. “The system is instability at J=4.” |
Response 4: Thanks for your careful checks. l have already modified this sentence to "The system is unstable at J=4" in section 4.1. |
Comments 5: Can the values be added for J=2, 10-16 to table 2 and for KI1 = 20, 200 to table 3? |
Response5 : Thanks for your suggestion. I have already added more experimental results in section 4.1 and section 4.2. |
Comments 6: What computational methods are used to calculate eigenvalues? |
Response6 : Thanks for your question. The pole-zero map of the liner analysis tool in Simulink is used to calculate eigenvalues. We perform linearization analysis on mathematical models built on Simulink using this tool. The distribution of zero and pole points can be obtained. |
Comments 7: What are the limitations observed using small-signal stability analysis for the proposed model? |
Response7 : Thanks for your question. For the proposed model, we can get find the control loops that affect stability by the eigenvalue analysis. Nevertheless, the small-signal model established in this paper is aimed at virtual synchronous control, and further research is needed for different grid-forming control strategies currently. |
Author Response File: Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsNo comment
Comments for author File: Comments.pdf
Minor grammatical errors and awkward phrasing should be corrected
Author Response
We tried our best to improve the manuscript and made some changes to the manuscript. These changes will not influence the content and framework of the paper. And here we did not list the changes but marked in blue in the revised paper. We appreciate for reviewers’ warm work earnestly and hope that the correction will meet with approval.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Comments and Suggestions for Authors..
Comments for author File: Comments.pdf