LED Lighting Agrosystem with Parallel Power Supply from Photovoltaic Modules and a Power Grid
, Vadim Bolshev 2,*, Alexander Sokolov 3 and Alexander Smirnov 3
Round 1
Reviewer 1 Report
The article deals with the power supply of LED lighting systems with PV module and grid connected in parallel. The research contribution is not very relevant and the application in agrosystems is not clear. Furthermore, it is necessary to consider:
- In section 1, the statement (in line 64 and following) about the relationship between DC grid development and renewable energies is debatable. The authors should provide consistent arguments regarding the development of DC grids with PV systems.
- Section with abbreviations and acronyms used in the text should be added.
- Figure 2 should explain the function and characteristics of each of the sensors, converters and other elements.
- The manuscript should be revised as there are serious errors of expression (e.g. comma as decimal separator in table 1 and 2). There are also incorrectly expressed units (e.g. m2).
- It does not seem reasonable that the tests are carried out with PV modules whose nominal power is significantly lower than the connected load. The results are conditioned by this characteristic and by the specifications of the components used in the tests.
- It should be indicated whether the solar irradiance is measured on horizontal or inclined plane.
- The graphs in figure 6 are not identified by a legend.
- The results obtained in figures 9, 10, 11, 12 and 13 are logical for the tested PV module and do not make any relevant contribution to this research. These figures consider the behaviour of PV systems which is well known to the scientific community.
Author Response
At the beginning I would like to thank the Reviewer for their time and valuable contributions. In attachment, you will find respond cover letter and the revised paper. All changes in the manuscript were highlighted by green color.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The authors describe an article entitled “LED lighting agrosystem with parallel power supply from photovoltaic modules and a power grid”. The topic of the manuscript is interesting, and the manuscript constitutes an interesting research article concerning the development of new photovoltaic systems aiming at reducing the cost of devices.
The work is well-written and a well-constructed introduction has been established by the authors. Sufficient spectra and figures are included in the manuscript for comprehension and clarity. Interesting and convincing results are also presented in this work. Overall, I think that this is a manuscript that I recommend for publication after inclusion of minor revisions.
1) what is the stability of these systems over time ? This point should be commented.
2) Authors investigated the ways how to reduce the cost of the photovoltaic systems. However, this cost reduction is not evaluated.
3) In the conclusion, no perspectives are provided. Please add.
4) For the reproducibility of the different experiments, no sufficient details are given. Please add.
Author Response
At the beginning I would like to thank Reviewers for their time and valuable contributions. In attachment, you will find respond cover letter and the revised paper. All changes in the manuscript were highlighted by green color.
Author Response File: Author Response.pdf
Reviewer 3 Report
In this paper, the authors provide an efficient power take-off from photovoltaic modules using inexpensive voltage converters for LED lighting system. The research is relatively novel, while still some drawbacks should be solved.
1. An abstract is a short summary of the paper. The abstract concisely reports the aims and outcomes of your research, so that readers know exactly what your paper is about. From the abstract of this manuscript, we just get the information of why the author do the research, but no research content and important conclusions. The authors should rewrite this part.
2. In Figure 6, the graphic legends of UPVM and ULED should be added.
Author Response
At the beginning I would like to thank Reviewers for their time and valuable contributions. In attachment, you will find respond cover letter and the revised paper. All changes in the manuscript were highlighted by green color.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
The following aspects remain unresolved:
- In the latest version of the manuscript no text is displayed from line 34 to line 72.
- The authors should check the correct place to add abbreviations in the manuscript.
- The question regarding the tilt for solar irradiance measurement is not answered. The question is about the tilt for solar irradiance measurement and not about the tilt of the tested PV module.
- In the latest version of the manuscript the problem persists in figure 6.
- It is not clear what the authors intend to express. It is not understood in figures 9 and 10 that the V-I and P-V characteristic curves at 410 and 250 W/m2 are higher than the same characteristics at 730 W/m2.
Author Response
Dear reviewer, we would like to thank for spent time and valuable contributions. Indeed, your comments helped to improve the paper and find typos. In attachment, you will find respond cover letter and the revised paper. All changes in the manuscript were highlighted by green color.
Author Response File: Author Response.pdf
