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Micro-grid technologies have greatly attracted attention due to quick development of distribution energy resources. Micro-grid studied by researchers primarily includes AC micro-grid, DC micro-grid and AC-DC hybrid micro-grid. The advantages and application of these three types of micro-grids have been introduced and analyzed in this paper. The grid architecture, energy management, operation control...
Simulation model of micro-grid including a direct-drive wind power generation, two sets of power-controlled distributed generations (DGs) and a three-phase fault module was investigated in Matlab/simulink. Based on the constructed model, the operating process switched from island mode to grid-connected mode was simulated and the voltage variance signal was detected with Daubechies(Db) wavelet. The...
Summary form only given. Multiferroics have attracted considerable attention recently because of their fascinating physical behaviors and potential applications. BiFeO3 is one of the well-known multiferroic compounds displaying coexistence of ferroelectricity and antiferromagnetism [1]. The BiFeO3 properties in nanosize were especially helpful for understanding the foundational ferroelectric and magnetic...
Lifting wavelet is a useful method to analyze the abrupt signal because lifting wavelet can simultaneously show the local characteristic of time domain signal and frequency domain signal. The dynamic power quality disturbance in modern power supply can usually engender the fault signal such as voltage sag, voltage swell and voltage interruption. Lifting wavelet and Fourier transform are used respectively...
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