Abstract

It is of great significance, especially for power quality, to realize the smooth switching and conversion between the two operation modes of Micro-Grid. In this paper, for the control of the two operation modes of Micro-Grid, constant power control strategy and Constant-Voltage Constant-Frequency control strategy are adopted, and analysis of these two kinds of control strategies. In order to solve the transient oscillation problem in the switching process between the two operation modes of Micro-Grid, a smooth switching control strategy is proposed. And then the strategy is applied to realize the smooth switching to ensure power quality in this paper. Lastly, a mode is constructed by PSCAD/EMTDC software to test whether the strategy is effective and practicable or not.

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