Design of Intelligent Controller for Voltage Restoration and Controlled Load Sharing in a Low Voltage DC Microgrid

Document Type : Original Article

Authors

1 Qom University of Technology

2 Faculty of Electrical and Computer Engineering, Qom University of Technology, Qom, Iran

Abstract

The DC microgrids in comparison with AC microgrids offer high efficiency, high reliability and also easy connection to most of energy resources. In DC microgrids, equal load sharing between resources and also regulation of DC bus voltage are important issues. Two control methods including droop control and centralized control have been introduced to handle these issues. Although the centralized controllers have high accuracy for microgrid control, this control method needs a high bandwidth communication link between the converters, hence the reliability of this method is low. For increasing performance of the droop control method, this paper introduces a new approach based on fuzzy logic control. In the proposed method, parameters of voltage restoration and current average controllers are determined by a fuzzy controller which causes the microgrid be properly controlled in different load conditions and line impedances. The proposed method has be simulated in MATLAB/Simulink environment. The simulation results show that the proposed controller causes enhanced load sharing accuracy and voltage restoration

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History

  • Receive Date: 11 April 2020
  • Revise Date: 23 November 2012
  • Accept Date: 15 June 2021
  • First Publish Date: 23 July 2021

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