Review Reports

Round 1

Reviewer 1 Report

You may please update it with the following comments.   The paper is very well written and the objective has been clearly defined and has been well met. Basically it could be seen that the frequency offset constraint, uncertain constraints of node voltage total harmonic distortion (THD) and negative sequence components of DGs, is developed to guarantee the reliability of each island. The flexible power flow algorithm and further 2m+1 point estimate method has definitely served to be an effective strategy towards the uncertainty analyses of the distributions of harmonic and negative sequence components. Results from table 4 clearly indicates that the Vone-ul/%, Cune-ul/% and THD-ul/% are well within the permissible limits with the proposed scheme compared to the conventional one.    Well done and a good job with the results. I agree that you considered the entire system (Scenario 3) for the analysis using the proposed strategy. If you feel it is good, you may please present the results considering the Scenario 1 and Scenario 2 or atleast for one of the reduced systems (Scenario 1 or Scenario 2). This will give an opportunity for all researchers to appreciate the paper with the full system and the reduced system with the proposed scheme. So, this would also be helpful to all the researchers that this proposed technique could be applied to any distribution system under consideration.     Please revise your paper accordingly and I further recommend the paper towards publication after a major revision. On the whole, very good job.  

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

The subject of this paper is of great interest to the power community. However, the level of English presented does not do justice to the work carried out. I recommend authors to carefully term the parameters etc.

In the abstract authors are required to mention what type of optimisation technique and/or algorithm have been used for network reconfiguration.

What is the meaning of the term ‘initial island’? Please elaborate for a wider audience.

Consider changing the term “Frequency offset” to ‘change in frequency’?

On P1, L21, change ‘initial’ to ‘initially’ division of the network to islands have been carried out via the connectivity ……………..

P1, L22, what is the initial island?

P1, L23, remove the term ‘decompose’.

On P1, L33, change the term “eventually” to finally.

P2, L58, change “island” to Islanding.

P4, L125, Xi may need to be changed to Xik for clarity purposes. Similarly Xi=0 needs to be elaborated.

P4, L158, Q_DGJ needs to be written as Q _{DGJ_max}

P6, L 194, perhaps ‘upper bound’ could be written as ‘upper limit’.

P7, L251, is the expression  for Y correct? Especially with regard to Xi.

Equations (21) to (25) require explanations and elaboration in terms of clarity and consistency.

Can the proposed methodologies be applied on a typical IEEE distribution network?

What will happen if the number of islands is increased. In other words, what is the limitation on the number of islanding?

In equation (1) what is the term f1i? Is it the fundamental frequency at node I ? Also the island name should appear within it.

P4, L141, explain which island?

In equation (4) all parameters need to be defined. Also why, in the equation above (4), is there a  –ve sign  between the active powers and in equation (4), there is +ve sign between the reactive powers? Please clarify or explain.

Equations (14) to (17) require some explanations.

The paper will benefit if the data for figure 2 could be provided in the appendix.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

- Power flow is calculates with a 2m+1 PEM method, but authors only use these results in the calculation of several indexes. But they do not use it to load-shedding optimization model and to network-reconfiguration optimization model. Explain better why is necessary to use a probabilistic power flow.  

- The algorithm of connectivity analysis should be explained.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Significant changes have been made and the authors have addressed all the questions posed by me. I feel the paper could be considered for acceptance.

Reviewer 2 Report

Authors have incorporated most of recommendations. This has enhanced not only presentation but also the technical information.