Journal of Modern Power Systems and Clean Energy

ISSN 2196-5625 CN 32-1884/TK

Droop control method for load share and voltage regulation in high-voltage microgrids

1. National Power Transformation and Control Engineering Technology Research Center, Hunan University, Changsha, 410082, China 2. Electrical and Computer Engineering, Illinois Institute of Technology, Chicago, IL, 60616, USA

Fund Project:

National Natural Science Foundation of China (No. 51207048), the National High Technology Research and Development of China (No.2014AA052601) and Higher National Excellent Doctoral Dissertation of Special Funds (No. 201441).

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials

    When the line impedance is considered in the microgrid, the accuracy of load sharing will decrease. In this paper, the impact of line impedance on the accuracy of load sharing is analyzed. A robust droop control for a high-voltage microgrid is proposed based on the signal detection on the high-voltage side of the coupling transformer. For a high-voltage microgrid, the equivalent impedance of coupling transformer connecting distributed generator with the grid is usually the dominate factor. Compared with the conventional droop control strategy, the proposed control method in this paper detects the feedback signal from the high-voltage side of the coupling transformer. The impact of line impedance on the load sharing accuracy can be mitigated significantly. The proposed droop control only changes the detection point of the feedback signal, thus it is easy to be implemented. The PSCAD/EMTDC simulation results show the effectiveness of the proposed robust droop control concept in load sharing and voltage regulation with highly accuracy.

    Cited by
Get Citation
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
  • Received:
  • Revised:
  • Adopted:
  • Online: January 22,2016
  • Published: