DC Bus Voltage Control of Grid-Side Converter in Permanent Magnet Synchronous Generator Based on Improved Second-Order Linear Active Disturbance Rejection Control

Round 1

Reviewer 1 Report

The article presents an improved method to control the DC bus voltage in power electronic converters for interconnecting a PMSG-based wind generator to the grid. The research work is well established. The research method is clearly explained, and the results are satisfying. However, as the authors mentioned for their planned future work, I think it is required to test this control system on a physical rig.

Hence, at this stage, I think the article is suitable to be published in current form, and no revision is needed.

Author Response

Dear expert,

Thank you for your recognition of our team's research work.We will test the control system on the physical system as soon as possible.

best regards

Reviewer 2 Report

The paper proposes new control strategy to control effect on DC bus voltage. However, there is lack of findings in describing the validation process. There is no experimental work have been conducted to attract the readers. In addition, Turnitin shows 43% of similarity index.

Author Response

Please see the attachment

Author Response File: Author Response.docx

Reviewer 3 Report

The paper deals with suppress the fluctuation of DC bus voltage. In particular, an optimized DC bus voltage control strategy is proposed by using the linear active disturbance rejection control.

The paper is well articulated, the proposed control is compared with traditional ones and the simulation results are good. Obviusouly, the improved results needed to confirmation by means experimental set.

The modeling approach to control development is convincing.

Author Response

Dear experts,

Thank you for your recognition of our team's research work. We will test the control system on the physical system as soon as possible.

Best regards

Reviewer 4 Report

Strengths of the paper

The introduction to the article is clear and the state of the art  is done properly. The modeling of converters is also clearly  described. The presented  method of DC voltage control is  interesting and certainly it has potential.

 

The disadvantages of the article.

The main disadvantage is the lack of experimental verification. It automatically raises many questions related to the implementation of the method. Can the applied solutions be implemented in physical systems and what are the requirements for control systems, e.g. for  microcontrollers? How can the declared voltage stabilization accuracy (approx. <0.7% in Fig 16) be influenced by the acuracy of the measuring systems or numerical errors resulting from the limited precision of the calculations? Is grid voltage harmonics distortions prevent the application of the method?

The authors did not mention any disadvantages of the proposedmethod.

Does the improvement of the DC voltage stability deteriorate the power control in the grid converter? In practical network applications, an appropriate gradient of power (current) delivered to the grid must be maintained.

Is the computational complexity of the proposed method higher than the traditional method?

 

In addition, I would suggest correcting the figures. In figs 2, 4, 5, 6, 9, there are no dots where the lines are connected, so it is not known which wires are connected and which only intersect.

In Figures 14-17 the fonts are a bit too small and therefore not legible.

Parameters for which the characteristics were obtained are missing from in some graphs. For example, in Fig. 11 there are no specific Te values for the presented curves.

Author Response

Please see the attachment

Author Response File: Author Response.docx

Round 2

Reviewer 2 Report

The authors response can be accepted. However, the authors should recheck their paper to Turnitin Software and make sure similarity index with maximum of 15%

Author Response

Dear expert,
Thank you for your recognition of my reply. In response to the similarity index in the article, I have made as much modification as possible and marked the modified part in red. Among them, the yellow mark is the first modification.
Best regards