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The Scientific World Journal
Volume 2014, Article ID 391945, 9 pages
Research Article

A New Seamless Transfer Control Strategy of the Microgrid

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science & Technology, Wuhan 430074, China

Received 24 January 2014; Accepted 20 February 2014; Published 22 May 2014

Academic Editors: Y. Mao, X. Meng, J. Zhou, and Z. Zhou

Copyright © 2014 Zhaoyun Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A microgrid may operate under two typical modes; the seamless transfer control of the microgrid is very important. The mode conversion controller is installed in microgrid and the control logic of master power is optimized for microgrid mode conversion. In the proposed scheme, master power is very important. The master-power is under the PQ control when microgrid is under grid-connected. And it is under V/F control when the microgrid is under islanding. The microgrid mode controller is used to solve the planned conversion. Three types of conversion are simulated in this paper. The simulation results show the correctness and validity of the mode control scheme. Finally, the implementation and application of the operation and control device are described.