Wireless Diagnosis and Control of DC–DC Converter for Off-Grid Photovoltaic Systems
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe paper focuses on a cloud-based fault detection method for a defective boost converter in a photovoltaic system. The fault is diagnosed using a fault detection algorithm based on Lyapunov function and power optimization.
The article has good objectives but needs to be improved. It presents many equations, which could be optimized. The article also presents many figures, it needs to be shortened (join figures).
From the results, the authors could compare the technique used for fault diagnosis with others presented in the literature, performance of the methods.
Author Response
Dear reviewer thank you very much, please find our improvements
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsThe paper addresses an important issue related to off-grid standalone PV systems. The paper presents a fault detection method for a defective boost converter in a photovoltaic system. The fault is diagnosed using a fault detection algorithm based on Lyapunov function and power optimization.
The following comments are essential to improve the quality of the paper:
1- The title should be changed to be consistent with the actual work, which is the fault in the DC-DC converter. Otherwise, the study should be extended to involve other faults such as hot spots of PV modules, and other types of faults of PV modules.
2- The investigated system is trivial: only one PV module driven by a single DC-DC boost converter. In fact, the minimum satisfactory/required system shall be a string configuration (composed of several PV modules either connected in series or parallel). This way, several real possible faults can be studied. This way, the proposed method can be assessed.
3- A single fault condition (open circuit of the semiconductor device) does not make sense to approve the method. This trivial fault can be easily identified by a single Hall-effect voltage sensor to measure the PV voltage. Accordingly, the investigated system shall contain several PV modules and several DC-DC converters (forming a string or array) where many possible faults can occur in several DC-DC converters or randomly of individual converter.
4- The list of references can be improved by adding more recently published journal articles related to the topic.
5- References 8 and 9 are not related to the topic. So, they can be removed.
6- The data sheet of the PV module and the power transistor should be added.
7- A list of abbreviations should be added before the references.
8- A list of symbols should be added before the references.
9- What is the software that has been utilized to carry out the simulation tasks?
Author Response
Dear reviewer, thank you very much for your comments and please find enclosed our improved paper
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsThe authors presented and answered the questions satisfactorily, but the article is in a different format than the template and remains very long, it needs to be adapted. Figures need to be grouped as figures (a), (b) and (c) for example, in my opinion for the publication version.
Author Response
Dear Editor and Reviewers
We thank the reviewers and the editor, showing our appreciation for their comments and suggestions for improving the paper. We have considered all of the reviewers’ comments, as described in the sequence, and we have modified the paper accordingly.
Author Response File: Author Response.pdf
