A THD-Based Fault Protection Method Using MSOGI-FLL Grid Voltage Estimator

Round 1

Reviewer 1 Report

This is a good quality work and can be published after minor changes with adding the comparison studies of some recent state of the art literature.

 

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

This paper is well written, the paper structure is good, information is given in details. Just several minor issues.

1.        It is better to add some quantitative results in the abstract to give a straight look of the algorithm performance.

2.        I suggest to add a table for the comparison of conventional protection technologies, voltage based protection, adaptive protection and harmonic based methods, to show their key indicators, advantages, and disadvantages. This would give a clear sight to readers.

3.        Although these protection methods are discussed individually, but a comprehensive comparison should be given, and also to show the current research gap, and why this study should be done. This should be done before mentioning what has been done in this paper.

4.        Figure 3, in stage 3, all sub-routes should come to the end.

 

Author Response

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Reviewer 3 Report

Abstract:

overall fine - but correct grammar in Line 26:

"... a high accuracy and a faster response"

1. Introduction:

Line 31: wind energy systems. And insert a comma after this

Line 35: "Furthermore, several technical ...

Line 59: " and they have a high implementation cost"

Line 63: "However, this requires ...  you need to spell out the acronym 'NN' once before using it - unless you mean 'ANN'

Line 64: remove "show to"

Line 85: "Harmonic-based methods ... [remove the "And, "]

Line 79: " ... since it needs advanced digital relays 

Line 80: "requires a high computational ..."

Line 113:  to the authors' ...

2. Protection Algorithm

Line 167, Table 1: Parameters of the System

Line 180: "Figure 2 shows ..." [drop in the 'In' at the beginning]

Line 195: the time in which 

Line 199: optical fiber is characterized by its 

Line 205: allowing it to stop, to wait ... and  to return

3. Results and Discussion

Line 414: Comparison with different Protection Methods

Line 469: it was reported that ...

Line 483: Table 4

4. Conclusions

Line 506: maths: namely ...

References:

always:

In: Proccedings

capital P needed in [9] and [23]

[10] Renewable and Sustainable Energy Reviews

[41] IEEE Transactions on the Smart Grid

[44] IEEE Transactions on Industrial Applications

Author Response

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Author Response File: Author Response.pdf

Reviewer 4 Report

The total harmonic distortion (THD) based fault protection method using MSOGI-FLL Grid voltage estimator is presented in the research. The manuscript is well written, however following are the suggestions to improve the quality of publication.

In abstract few lines can be added about the research problem along with the constraints in the existing solutions to highlight the novelty of the research.

Please place the Figure 2 and related table closer to the sub-section 2.1 proposed system currently it is placed under sub-section 2.2.

The states can be defined under the sub-section 2.3. finite state machine as State 1, State 2, 3, … State 6 without 2.3…. to avoid confusion.

Few lines about the future directions may be added at the end of concussions.

Author Response

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Author Response File: Author Response.pdf