An optimal adaptive control of DC-Microgrid with the aim of accurate current sharing and voltage regulation according to the load variation and gray-wolf optimization

Document Type : Original Article

Authors

1 Southern Denmark, Sønderborg, Denmark

2 China Three Gorges University, Hubei, China

3 Department of Mechatronics and Control Engineering, University of Engineering and Technology, Lahore 54890, Pakistan

4 University of Southern Denmark, Sønderborg, Denmark

Abstract

Today, DC microgrids provide the possibility to provide proper management and control for energy storage systems, generation sources, consumers, and other power components. The droop control method is one of the most common methods used in DC microgrids. One of the main challenges in the droop control method is that it is not possible to share the current and regulate the voltage at the same time in this method. To overcome the weaknesses of the voltage drop control method, the paper presents an adaptive control method that can be used to share the current and adjust the voltage accordingly based on the load condition. When the load in the microgrid is low, the output current is lower than the maximum limit and so current sharing is not a difficult challenge. When the load increases to the point where the output current exceeds the maximum limit then current sharing becomes very important. Using this method, this problem is solved by increasing the total gain decrease. For more accuracy, a gray-wolf algorithm has been used to optimize the droop gains. The performance of the proposed method has been verified through a set of simulations, and the results confirm the effectiveness of the proposed method for the DC microgrid.

Keywords

Advances in Engineering and Intelligence Systems
Volume 002, Issue 03
September 2023
Pages 53-63

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History

  • Receive Date: 11 July 2023
  • Revise Date: 09 September 2023
  • Accept Date: 21 September 2023

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