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Automatic superimposed droop frequency control scheme for dc microgrids

Jafari Matehkolaei, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/ACEMP-OPTIM44294.2019.9007132
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. This paper proposes a control strategy to improve the superimposed droop frequency control scheme in DC microgrids. Conventional droop-based schemes for DC microgrids control suffer from issues such as inaccurate power sharing among the sources, voltage control with insufficient quality, and adverse effect of the line resistance on the droop characteristic. To overcome these challenges, the superimposed droop frequency method has been introduced. However, the stable operation in terms of the load variations and improper voltage quality are still the challenges with this prior-art method due to the injected AC voltages. In this paper, a method is proposed to solve the stability problem and alleviate the overall voltage quality in the superimposed droop frequency scheme. The performance of the proposed method is verified by different simulation studies in MATLAB/SIMULINK environment. © 2019 IEEE
  6. Keywords:
  7. DC microgrids ; Droop-based control method ; Power-sharing ; Transmission line resistance effect ; Electric lines ; Electric machinery ; MATLAB ; Microgrids ; Oscillators (electronic) ; Power electronics ; Control methods ; Microgrid stability ; Power sharing ; Superimposed frequency scheme ; Voltage quality ; Quality control
  8. Source: 2019 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2019 and 2019 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2019, 27 August 2019 through 29 August 2019 ; 2019 , Pages 120-125 ; 9781538676875 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/9007132