Transient behavior representation, contribution to fault current assessment, and transient response improvement in DFIG-based wind turbines assisted with crowbar hardware

Rahimi, Mohsen; Azizi, Ali

doi:10.1002/etep.2698

Cited by 20 publications

(7 citation statements)

References 45 publications

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“…The model of DFIG in synchronous Park reference frame can be expressed as follows:

({, \begin{matrix} V_{sdq} = \frac{{dφ}_{sdq}}{dt} + R_{s} i_{sdq} \overset{+}{true} ω_{s} φ_{sqd} \\ V_{rdq} = \frac{{dφ}_{rdq}}{dt} + R_{r} i_{rdq} \overset{+}{true} ω_{r} φ_{rqd} \end{matrix}),

in which:

ω_{r} = ω_{s} - ω_{m}

({, \begin{matrix} φ_{sdq} = L_{s} i_{sdq} + normalM i_{rdq} \\ φ_{rdq} = L_{r} i_{rdq} + normalM i_{sdq} \end{matrix}) .

To control the DC‐bus voltage and stator frequency, we choose field‐oriented control (FOC). In the FOC strategy, the stator flux coincides with the d‐axis (Figure ).…”

Section: Proposed Topology Of Dfig Connected To Dc‐busmentioning

confidence: 99%

An open‐switch fault detection scheme in the IGBT‐based PWM power converter used in DFIG connected to DC‐bus

Touaiti

Azza

Jemli

2019

Int Trans Electr Energ Syst

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Summary This paper addresses the diagnosis of open‐switch fault in pulse‐width modulation (PWM) power converter based on insulated‐gate bipolar transistor (IGBT) used in doubly‐fed induction generator‐direct current (DFIG‐DC) system. The fault diagnosis is carried out by analyzing the rotor currents within healthy and faulty operation conditions. In the new proposed configuration of DFIG connected to DC‐bus, the diode rectifier is employed to connect the stator windings to the DC‐bus and the PWM power converter is employed to connect the rotor windings to the DC‐bus. The main goal of using a PWM power converter is to keep the stator voltage and frequency constant at rated values. In this regard, the various experimental results for open‐circuit faults are obtained by using dSpace DS1104 control board. Some experimental results are obtained, proving the effectiveness of the proposed diagnosis approach such as low detection time and high robustness against false alarms.

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“…The model of DFIG in synchronous Park reference frame can be expressed as follows:

({, \begin{matrix} V_{sdq} = \frac{{dφ}_{sdq}}{dt} + R_{s} i_{sdq} \overset{+}{true} ω_{s} φ_{sqd} \\ V_{rdq} = \frac{{dφ}_{rdq}}{dt} + R_{r} i_{rdq} \overset{+}{true} ω_{r} φ_{rqd} \end{matrix}),

in which:

ω_{r} = ω_{s} - ω_{m}

({, \begin{matrix} φ_{sdq} = L_{s} i_{sdq} + normalM i_{rdq} \\ φ_{rdq} = L_{r} i_{rdq} + normalM i_{sdq} \end{matrix}) .

To control the DC‐bus voltage and stator frequency, we choose field‐oriented control (FOC). In the FOC strategy, the stator flux coincides with the d‐axis (Figure ).…”

Section: Proposed Topology Of Dfig Connected To Dc‐busmentioning

confidence: 99%

An open‐switch fault detection scheme in the IGBT‐based PWM power converter used in DFIG connected to DC‐bus

Touaiti

Azza

Jemli

2019

Int Trans Electr Energ Syst

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“…In the literature (Sulla, et al, 2011;Zhai, et al, 2013;Wang et al, 2015;Fu et al, 2017;Rahimi and Azizi, 2019), the flux linkage of the stator was solved simply after the faults at different positions, and in this paper the calculation formula of the DFIG short-circuit current was given under different drop degrees of the terminal voltage, further. However, this method does not take into account rotor current dynamic process effects.…”

Section: Introductionmentioning

confidence: 97%

Research on Short-Circuit Current Calculation Method of Doubly-Fed Wind Turbines Considering Rotor Dynamic Process

Yin

2021

Front. Energy Res.

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With the enlarging scale of doubly-fed induction generators (DFIGs) connected to power systems, it is important to analyze the influence of a short-circuit current to system relay protection. Due to the correct evaluation of the protection operation characteristics, the DFIG short-circuit current needs to be calculated accurately. But the current research on the short-circuit current of DFIG is based on the following assumption: the rotor excitation current is zero after the rotor crowbar is put, and the influence of its dynamic process is ignored. This will bring errors to the calculation results. This paper takes into account the influence of rotor current dynamics by studying the mechanism of the potential transient change of DFIG. The stator rotor flux linkage of DFIG in the event of a three-phase short-circuit is accurately calculated, and an improved RMS calculation method of doubly-fed wind turbine short circuit current is proposed. A physical experiment platform with an actual controller of a doubly-fed fan is established, based on RTDS. It can be seen from the experiment that the short-circuit current calculation method proposed in this paper is more accurate than those methods that ignore the rotor dynamic process. This study lays a foundation for further study of the influence of DFIG on the protection operation characteristics.

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“…The external retrofit solution involves protection circuits, storage devices, and reactive injection devices, including flexible AC transmission controllers (FACTS) [5]. Several external protection circuit based solutions have been reported in the literature, among which crowbar protection is the foremost technique for improving the FRT capabilities [6], [7]. An approach that combines a crowbar and chopper circuit has also been reported in the literature [8].…”

Section: Introductionmentioning

confidence: 99%

A Cooperative Approach of Frequency Regulation Through Virtual Inertia Control and Enhancement of Low Voltage Ride-through in DFIG-based Wind Farm

Verma

Seethalekshmi

Dwivedi

2022

Journal of Modern Power Systems and Clean Energy

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Doubly-fed induction generator (DFIG)-based wind farms (WFs) are interfaced with power electronic converters. Such interfaces are attributed to the low inertia generated in the WFs under high penetration and that becomes prevalent in a fault scenario. Therefore, transient stability enhancement along with frequency stability in DFIG-based WFs is a major concern in the present scenario. In this paper, a cooperative approach consisting of virtual inertia control (VIC) and a modified grid-side converter (GSC) approach for low voltage ridethrough (LVRT) is proposed to achieve fault ride-through (FRT) capabilities as per the grid code requirements (GCRs) while providing frequency support to the grid through a synthetic inertia. The proposed approach provides LVRT and reactive power compensation in the system. The participation of the VIC in a rotor-side converter (RSC) provides frequency support to the DFIG-based WFs. The combined approach supports active power compensation and provides sufficient kinetic energy support to the system in a contingency scenario. Simulation studies are carried out in MATLAB/Simulink environment for symmetrical and unsymmetrical faults. The superiority of the proposed scheme is demonstrated through analysis of the performance of the scheme and that of a series resonance bridgetype fault current limiter (SR-BFCL). Index Terms--Virtual inertia controller (VIC), doubly-fed induction generator (DFIG), fault ride-through (FRT) capability, wind farm (WF), fault current limiter (FCL).

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Transient behavior representation, contribution to fault current assessment, and transient response improvement in DFIG-based wind turbines assisted with crowbar hardware

Cited by 20 publications

References 45 publications

An open‐switch fault detection scheme in the IGBT‐based PWM power converter used in DFIG connected to DC‐bus

An open‐switch fault detection scheme in the IGBT‐based PWM power converter used in DFIG connected to DC‐bus

Research on Short-Circuit Current Calculation Method of Doubly-Fed Wind Turbines Considering Rotor Dynamic Process

A Cooperative Approach of Frequency Regulation Through Virtual Inertia Control and Enhancement of Low Voltage Ride-through in DFIG-based Wind Farm

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