A Two-Layer Control Strategy for the Participation of Energy Storage Battery Systems in Grid Frequency Regulation

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Dear authors,

some suggestions to improve your work. Please add more information on the theory you show at the beginnig. Put the attention on the need of two layers strategy. Explain why this structure is necessary. If possibile put some examples. Put the emphasis on the possibile interactions between control layers. More details in explaining the equations in subsection "Objective Function and Constraint Function". The explainations on simulation results are now insufficient. Please revise it. Also erase the references in abstract. Usually, there are not references on an abstract. Best regards

Comments on the Quality of English Language

English is quite good. Maybe a small review is necessary to improve the quality.

Author Response

Dear Reviewer:

Thank you very much for your suggestions, and adding some relevant background and documentary proof materials about the theoretical content shown at the beginning of the article. On the control idea of the double-layer structure, Mainly to solve the problem of responsibility allocation when multiple sets of energy storage batteries and traditional units jointly participate in frequency modulation, Each layer of control has its own role, The first layer of control is mainly for frequency dynamic correction, Achieving the goal of having a frequency deviation of 0, Using the model for predictive control, A preliminary distribution of the output of each FM unit, The above-layer results are the initial values, Transfer the output of each unit to the lower control, The lower control is mainly from the perspective of economic optimal, Considering the nuclear power status of the energy storage unit, The output of each unit is further carried out in a balanced distribution, In the mode of double-layer control structure, the purpose of economy and frequency-deviation of 0 can be satisfied. The relevant interpretation of the objective function and the constraint function is also further interpreted in the paper. The interpretation of the simulation results is also presented as a corresponding more comprehensive supplement in the paper. The references in the abstract are also deleted. Thank you very much for some suggestions to my article, the article is more perfect after your suggestions, to extend the most sincere greetings to you!

Author Response File: Author Response.docx

Reviewer 2 Report

Comments and Suggestions for Authors

The subject of the article is very current and concerns the problem of frequency fluctuations caused by a lack of dynamic power between the power system and reception in the event of connecting a large number of new energy sources to the network. The presented problem applies to energy networks around the world. It is current in countries where large amounts of electric cars arrive.

Literature analysis was made in a careful way and was described with due diligence. However, the number of literature items is not enough. Another 20 articles should be analyzed. These should be the latest articles of European and American scientists. The authors only quote scientific work written by the authors from Asia. In the era of globalization, in the analysis of literature in the introduction, the achievements of scientists from around the world should be taken into account.

The dynamic frequency response of the region has been well planned and illustrated with a transparent block diagram. Presented in Chapter 4 Two-Layer Control Strategy Based on FM Duty Assignment is a very interesting solution that can be practical in the area of energy. The original control algorithms have been illustrated by structure diagrams.

The author's strategy has been verified correctly and the positive results of its application were presented.

Final conclusions were formulated correctly. However, there is a lack of information about the practical application of the conducted research. The authors also did not conclude information about the continuation of the started research. You should add a few sentences about the preferred directions of continuing research.

Comments on the Quality of English Language

The article contains very long sentences that are repeatedly complex. Therefore, it is difficult to read. The language correction should be made to shorten your sentences and improve the precise transmission of information.

Author Response

Dear Reviewer:

Thank you very much for your suggestions on my article. Your relevant suggestions and comments are very detailed and comprehensive. About reference reference, we after reading a large number of global literature, further added more scientists around the world related some research content, added more about the secondary frequency modulation control strategy related research results, including research within the region and interregional given after the relevant research, the literature research strategy review more comprehensive supplement, for the same further research after the outlook laid a good foundation, which also triggered more about secondary frequency modulation interregional coordination and coordination, supplementary content in the article introduction more fully and comprehensive. In terms of conclusion, based on the current research content, the future research direction and the related expansion are further discussed. Thank you again for some suggestions to my article, the article is more perfect after your suggestions, to extend the most sincere greetings to you!

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Dear authors,

 

the paper is ok. Best regards

Comments on the Quality of English Language

No comments. It Is ok