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Construction, operation and control of a laboratory-scale Microgrid

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3 Author(s)
Wang Chengshan ; Sch. of Electr. Eng. & Autom., Tianjin Univ., Tianjin, China ; Zhangang Yang ; Cheng, K.W.E.

To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable collaborative operation, a battery energy storage interfaced with a bi-directional inverter is necessary in this Microgrid. In the grid-connected mode, both the distributed generators converters and the bi-directional inverter are the grid-following unit. While switching from grid-connected mode to islanded mode, the bi-directional inverter is setting the voltage and frequency of the Microgrid through absorbing or releasing energy. The operation experimental results show that the laboratory-scale Microgrid system can operate in grid-connected or islanded mode, with a seamless transfer from one mode to the other, and hence increase the reliability of energy supplies.

Published in:

Power Electronics Systems and Applications, 2009. PESA 2009. 3rd International Conference on

Date of Conference:

20-22 May 2009