Short-time voltage variance detection of micro-grid with direct-drive wind power generation

Author

Zhou Jian-ping ; Zhu Jian-ping

Author_Institution

Sch. of Autom. Eng., Shanghai Univ. of Electr. Power, Shanghai, China

fYear

2014

fDate

May 31 2014-June 2 2014

Firstpage

4507

Lastpage

4511

Abstract

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 simulation results show that the singularity of voltage variance was quickly and accurately detected with db wavelet. The fast and accurate detection of short-circuited fault signal is helpful to improve power quality of micro-grid.

Keywords

distributed power generation; power generation faults; power grids; power supply quality; short-circuit currents; signal detection; wavelet transforms; wind power plants; Daubechies wavelet; Matlab/simulink; direct-drive wind power generation; grid-connected mode; island mode; microgrid; power quality; power-controlled distributed generations; short-circuited fault signal detection; short-time voltage variance detection; simulation model; three-phase fault module; voltage variance; voltage variance signal; Generators; Load modeling; Mathematical model; Power grids; Voltage fluctuations; Wavelet transforms; Wind power generation; Db wavelet; Micro-grid; voltage variance; wind power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (2014 CCDC), The 26th Chinese

Conference_Location

Changsha

Print_ISBN

978-1-4799-3707-3

Type

conf

DOI

10.1109/CCDC.2014.6852976

Filename

6852976