Study on the fault ride through critical elements and coordinated control of DFIG's converters

Autor: Bingjie Tang, Yongning Chi, Xinshou Tian, Yan Li
Jazyk: angličtina
Rok vydání: 2019
Předmět:
rotors
power convertors
power generation faults
shafts
power generation control
power grids
wind turbines
electric current control
asynchronous generators
wind power plants
additional hardware equipment
coordinated control strategy
reactive current support
improving RSC control strategy
grid fault
matlab/Simulink simulation studies
reactive current control scheme
extra hardware equipment
improving RSG control scheme
rotor
doubly fed induction generator
FRT problem
voltage stability
given time
continuous operation
(FRT) capability
modern grid codes
power grid
management
safe operation
great challenges
large-scale wind power integration capacity
DFIG's converters
critical elements
fault ride
DFIG based wind turbine shaft
enhanced reactive support
Engineering (General). Civil engineering (General)
TA1-2040
Zdroj: The Journal of Engineering (2019)
Druh dokumentu: article
ISSN: 2051-3305
DOI: 10.1049/joe.2018.8609
Popis: The increasing of large-scale wind power integration capacity brings great challenges to the safe operation and management of power grid. Modern grid codes put forward the requirements of fault ride through (FRT) capability: (i) to remain continuous operation at a given time; (ii) to contribute to support the voltage stability during FRT by providing reactive current. Aiming at the FRT problem of doubly fed induction generator (DFIG), critical elements of the rotor side converter (RSC) and the grid side converter (GSC) to FRT are analysed, and the improving RSC control scheme, adding extra hardware equipment, and improving reactive current control scheme are studied. Matlab/Simulink simulation studies are conducted to verify the effectiveness of the proposed strategies. The results show that when the grid fault is light, the improving RSC control strategy can effectively control the rotor winding overcurrent, when the grid fault is serious, it needs additional hardware equipment; the coordinated control strategy of the RSC and the GSC providing reactive current support is identified as the most advantageous approach because it not only provides enhanced reactive support for the grid, but also avoids over-speed risk of DFIG based wind turbine shaft.
Databáze: Directory of Open Access Journals
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