Abstract
The islanding occurred in the photovoltaic power generation system may bring great harm, therefore the research on the islanding detection and protection has important practical significance. Based on the existing islanding detection method, this paper analyzes an islanding detection method based on frequency of small asymmetry. The method is suitable for power-matching islanding, and combined with passive detection, islanding detection can be achieved. This paper analyzes its theory and establishes a model. The simulation results show that the proposed islanding detection method is rapid and effective.
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