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This paper presents a new power quality detection method based on the improved HHT in microgrid. Hilbert-Huang Transform (HHT) can distill these disturbing signals automatically and time-frequency spectrum can be obtained. However, in the application of this method there are serious end effects that mixed mode phenomenon will appear, affecting the detecting results. In order to suppress the end effects,...
Microgrid contains many distributed resources (DR), such as photovoltaic, wind power, and these DR which have the characteristics of random, volatility and intermittent, will cause voltage fluctuation and flicker, therefore, harmonic pollution will be produced from power electronic devices in DR. Hilbert-Huang Transform (HHT) can distill these disturbing signals automatically and time-frequency spectrum...
Distributed generation in microgrid is mainly composed of new energy and renewable energy resources. The maximum power point of the PV cell array is various from time to time with the change of circumstance and load. The fuzzy control can react to the environment change quickly and keep the photovoltaic system work on its maximum power point all the time. However, the limitation in the fuzzy control...
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