A Current Selective Tripping Protection Scheme for the Distribution Network with PV

Round 1

Reviewer 1 Report

Before proceedings, I have following concerns;

Please some quantification results in the abstract.

Please arrange the keywords in alphabetical order.

More explanation of the Fig. 9 is required.

The proposed scheme is presented on what basis? Please justify it.

The main contribution of the paper is not clearly presented and the back ground study is not well presented especially in the middle of the introduction section. It can be improved by adding the related studies to clarify the research gap. Some studies such as doi: https://0-doi-org.brum.beds.ac.uk/10.1016/j.asoc.2023.110386, doi: https://0-doi-org.brum.beds.ac.uk/10.1016/j.energy.2023.128345, and doi: 10.1109/TPWRD.2023.3239479 can be considered as literature review of the existing works.

The Table 13 is very big, but the explanation is not given in the text.

The proposed system is applicable for which rating of the solar PV?

The explanation of the all other faults can be added to cover the main aspect of the power system faults.

The future work is not recommended in the conclusion section.

Minor editing of English language required

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Dear Sir/Madam

My comments

In This study, Photovoltaic (PV) systems have been included in power networks as a result of international efforts to combat population expansion and global warming. This has caused variations in fault current magnitudes and directions, which might lead to issues with standard relays. This paper suggests a quick and dependable current selective tripping protection technique that recognizes immediate trips and locates problem sites. The plan successfully addresses issues brought on by PV system penetration, faults found at feeders and buses, and resistance grounding faults.

This study is about analyzing the data of the proposed system, presenting its data and analyzing it, and there is no new theory or application in it. This work is very important for specialists, especially researchers, to know what is happening in this proposed network.

Best Regards

Author Response

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Reviewer 3 Report

1.       I suggest adding nomenclature to describe abbreviation.

Point 1: Abstract

1.       Please add specific details about the proposed protection scheme.

2.       Please provide specific results or findings from the simulation analysis using PSCAD/EMTDC.

3.       The abstract mentions that the proposed scheme can reliably detect and isolate faults at the feeder and bus, as well as certain resistance grounding faults. Please provide some information about the real-world implications of these findings, such as improved system reliability, reduced downtime, or enhanced safety.

Point 2: Introduction

1.       The discussion on the impact of PV integration on distribution networks is well-presented. Please providing concrete examples or statistics that illustrate the extent of stress reduction and transmission loss reduction achieved through distributed PV integration.

2.       The introduction introduces the complexities of coordinating relay protection schemes in the presence of PV systems. Please elaborate on specific challenges related to fault detection, accurate relay coordination, and signal discrimination.

3.       The introduction adequately mentions prior research efforts, but to create a stronger connection between your work and existing literature, please consider providing brief summaries or key findings from the studies referenced.

Point 3: Conventional Protection Scheme of the Distribution Network

1.      2.1 : While the formula includes coefficients like Krel, KMs, and Kre, there is no detailed explanation of their meanings or significance. Please provide a brief description of each coefficient's role in the formula would enhance clarity.

2.      2.1 : Please explain about the concept of "direction element" so that it can be understood clearly.

3.      2.2 : While it's mentioned that protection devices should have the function of direction determination. Please provide a brief explanation of why this is essential in the context of PV system integration.

4.      2.2 : Please elaborate further on how directional overcurrent protection works and its role in ensuring reliable power supply and selectivity.

Point 4: The Proposed Current Selective Tripping Protection Scheme

1.       3.1 : Please provide a bit more detail about the role of the adjacent protection device. Emphasize that this device is crucial for receiving and processing the transmitted information to make an informed decision about protection actions.

2.       3.2.1 : Please describe how the selective tripping logic determines which circuit breakers (2 and 3) are switched off in response to the detected fault. Highlight that this logic is designed to isolate the faulty section while preserving the rest of the system.

3.       3.2.2 : Please explain how Relays R3 and R4 cooperate in detecting and analyzing the fault. Emphasize that their combined action information helps determine the fault's general location.

Point 5: Conclusions

1.       Please provide a succinct overview of the proposed fast and reliable current selective tripping protection scheme. Highlight its key features and advantages over the conventional directional overcurrent protection.

2.       Please emphasize the importance of practical validation by mentioning that the proposed scheme was successfully verified on an actual distribution network in China.

3.       Please discuss how practical considerations, such as fault location, fault type, and fault resistance, were integrated into your studies.

Point 5: Reference

4.       Please check consistency of format reference (such as capital letter format in article title, italic format in journal title, etc.).

Writing in English is sufficient

Author Response

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Author Response File: Author Response.pdf

Reviewer 4 Report

The paper addresses the protection mechanism of a PV integrated power distribution system. Here are the following my concerns for the manuscript-

1. There are frequent typo and grammatical mistakes in the manuscript.

2. The State of the art is missing in the introduction section and it should also include the novel contribution of the present work.

3. It has been written in the introduction section that the proposed approach is fast and reliable. However, no such comparison is provided in the paper.  

4. For any protection mechanism accuracy percentage is also very important, specify the overall accuracy percentage of the proposed approach.

5. Provide a comparative analysis of the accuracy and time of response of proposed approach.

There are frequent typo and grammatical mistakes in the manuscript.

Author Response

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Round 2

Reviewer 1 Report

The is looks improved. 

Reviewer 3 Report

the authors have been addressed all comments