Decoupled-DFIG Fault Ride-Through Strategy for Enhanced Stability Performance During Grid Faults

Meegahapola, Lasantha; Littler, Timothy; Flynn, Damian

doi:10.1109/tste.2010.2058133

Cited by 150 publications

(99 citation statements)

References 32 publications

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“…The new grid codes force wind turbines to stay connected to the grid during and after a voltage dip, i.e., low voltage ride through (LVRT). The conventional way to protect a DFIG wind turbine from a grid fault is by installing crowbar devices [11]- [12]. The crowbar is capable of limiting the overvoltage in the DC-Link and overcurrent in the rotorside converter.…”

Section: ) Crowbarmentioning

confidence: 99%

Active damping of torsional vibrations in the drive train of a DFIG wind turbine

Chen¹,

Xu²,

Wenske³

2024

RE&PQJ

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Abstract. Torsional vibrations in the drive train of the doubly-fed induction generator (DFIG) based wind turbine can cause large mechanical stress and reduce the life cycle of the components. They can be easily induced by sudden changes from the turbine rotor side or grid side. In this paper, a model-based active damper of the torsional vibration designed with the linearquadratic-Gaussian (LQG) algorithm is proposed. The modelling of the drive train takes the flexibility of the rotor blades into account and utilizes a three-mass model. A combination of different simulation packages, namely FAST (Fatigue, Aerodynamics, Structure, Turbulence) and Matlab/Simulink describing important dynamics of both the mechanical and electrical side, is applied to analyse the vibrations in the drive train and test the algorithm. Simulation results show that the proposed active damping can suppress the torsional vibrations in the drive train effectively even if a gird fault occurs.

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Section: ) Crowbarmentioning

confidence: 99%

Active damping of torsional vibrations in the drive train of a DFIG wind turbine

Chen¹,

Xu²,

Wenske³

2024

RE&PQJ

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“…The Electromagnetic Force ( e r ) induced in the rotor is the sum of two terms, e r f e e rn , Equation (11). The first term, e r f , is due to grid voltage, shown in Equation (12).…”

Section: Doubly Fed Induction Generator (Dfig) Behavior Under Voltagementioning

confidence: 99%

“…This solution provides an alternative path to rotor currents protecting the B2B converter. Its major disadvantage is that the DFIG loses its controllability once the crowbar is triggered, due to the rotor side converter deactivating [11]. In such a situation, the DFIG absorbs a large amount of reactive power from the grid, leading to further grid voltage degradation [4].…”

Section: Introductionmentioning

confidence: 99%

Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit

et al. 2015

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This paper have studied the dynamic of a 2.0 MW Doubly Fed Induction Generator (DFIG) during a severe voltage sag. Using the dynamic model of a DFIG, it was possible to determine the current, Electromagnetic Force and flux behavior during three-phase symmetrical voltage dip. Among the technologies of wind turbines the DFIG is widely employed; however, this machine is extremely susceptible to disturbances from the grid. In order to improve DFIG Low Voltage Ride-Through (LVRT), it is proposed a novel solution, using Superconducting Current Limiter (SCL) in two arrangements: one, the SCL is placed between the machine rotor and the rotor side converter (RSC), and another placed in the RSC DC-link. The proposal is validated through simulation using PSCAD TM /EMTDC TM and according to requirements of specific regulations. The analysis ensure that both SCL arrangements behave likewise, and are effective in decrement the rotor currents during the disturbance.

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“…The STATCOM also helps in improvement of power quality. But the usage of big STATCOMs [6] in the wind park will result in high cost [5] of these systems and hence this will discourage their utilization.…”

Section: Control Strategies For Dfig Wind Turbinementioning

confidence: 99%

Comparison of Crowbar Control and Novel Control Methods for DFIG Wind Turbine to Enhance LVRT Capability under Various Faults

T.Madhurantaka¹

2014

IJAREEIE

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This paper presents a comparison between conventional crowbar control and new control method .The new control method includes control for both the rotor and grid side converters to enhance the low-voltage ridethrough (LVRT) capacity of the DFIG WT. By providing suitable control for RSC and GSC converter switching circuit, the parameters voltage, current, real and reactive power, DC link voltage, rotor speed are controlled. In addition to this the pitch control is also provided. With the aid of the grid side control scheme the DC-link voltage fluctuation can been effectively reduced. The new control method for the grid side controller can effectively reduce the high transients that may occur during the faults. This new control can enable both active and reactive supports to the faulted grids from WT which is difficult for the crowbar based control. In this paper the crowbar control scheme is compared with proposed control method and the new method is found to be very effective in achieving LVRT capacity during symmetrical and unsymmetrical fault.

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Decoupled-DFIG Fault Ride-Through Strategy for Enhanced Stability Performance During Grid Faults

Cited by 150 publications

References 32 publications

Active damping of torsional vibrations in the drive train of a DFIG wind turbine

Active damping of torsional vibrations in the drive train of a DFIG wind turbine

Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit

Comparison of Crowbar Control and Novel Control Methods for DFIG Wind Turbine to Enhance LVRT Capability under Various Faults

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