Performance of new solid-state fault current limiter for transient stability enhancement of DFIG based wind generator

Hossain, Emrad

doi:10.1109/naps.2017.8107187

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…In (14), v s0 and ω s are equal to 1 pu. Considering (14), the maximum rotor current depends on prefault rotor speed, ω r , and crowbar resistance, R crow . Figure 3 shows the the RSC and rotor transient equivalent circuit after the crowbar activation, where e ra , e rb , and e rc are the 3 phase rotor back-emf voltages.…”

Section: Selection Of Crowbar Resistancementioning

confidence: 99%

“…This in turn prevents flowing of the rotor inrush current into the DC-link capacitor through the rotor side converter diodes, during the fault once the crowbar is activated, and consequently protects the RSC and DC link capacitor. Hence, it is required that By replacing (14) into (15), we have…”

Section: Selection Of Crowbar Resistancementioning

confidence: 99%

“…Approaches proposed in literatures for the LVRT capability enhancement of DFIGs are divided into 2 main groups: LVRT improvement by adding external hardware [5][6][7][8][9][10][11][12][13][14][15][16][17] and LVRT enhancement by using advanced control methods and modifying the DFIG converter control. [18][19][20][21][22][23][24][25][26] The first group of LVRT approaches uses external passive and active equipments and hardware.…”

Section: Introductionmentioning

confidence: 99%

“…Some literatures use passive elements such as crowbar, fault current limiter, and series damping resistor for LVRT improvement . A number of related papers use supercapacitor energy storage system, superconducting fault current limiter with magnetic energy storage device, flexible ac transmission systems, new different types of current limiters, and series converter located between the stator and grid . Such remedies may be technically feasible, but require additional converters and other equipment, which are costly.…”

Section: Introductionmentioning

confidence: 99%

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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

Rahimi

Azizi

2018

Int Trans Electr Energ Syst

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Summary This paper analytically deals with the transient behavior evaluation and crowbar hardware design for the low voltage ride‐through (LVRT) capability enhancement in doubly fed induction generator (DFIG)‐based wind turbines (WTs). The paper indeed answers the following question analytically. “What are the main criteria for choosing the crowbar resistance?” It is shown that the value of the crowbar resistance affects both the peak values and oscillations of the DFIG transient response. Therefore, the paper first analytically investigates the rotor dynamics with the crowbar hardware during the voltage dip, and then develops analytical expressions for the crowbar resistance design to meet the LVRT requirement. It is shown that selection of the crowbar resistance higher than the maximum value may deteriorate the DFIG LVRT performance. Next, contribution of the DFIG to the fault current by using the crowbar is analytically studied. Then, the impact of crowbar resistance on the damping of the DFIG transient oscillations is examined by the modal analysis and phase plots of the stator flux. At the end, the concept of rotor active impedance is introduced, the LVRT capability of the DFIG is evaluated, and the DFIG transient responses under different crowbar resistances are investigated and compared.

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Section: Selection Of Crowbar Resistancementioning

confidence: 99%

Section: Selection Of Crowbar Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Rahimi

Azizi

2018

Int Trans Electr Energ Syst

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“…It is possible to test different types of wind generators and study their interactions with the grid [12]. Moreover, investigations on the generator-converter aspects such as DC bus characteristics [45], or voltage transients [46] or fault analysis [47] can sophisticatedly be carried out with this configuration. A very unique property of the large generator converter lab is the Fault-Ride-Through (FRT) grid emulator (16).…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Large Electrical Machine Test

Ebrahimi¹

2018

Preprint

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The acceptability and also the acceleration ofrenewable energy technologies is tightly linked with a betterunderstanding of dynamic behavior of drive train componentsand their interactions. This ultimate understanding of systemcharacteristics can only be achieved with comprehensiveexperimental investigations on different phenomena of largeelectrical generators. This leads consequently to a betterverification of numerical and analytical models of largegenerators. The large generator-converter lab which is discussedin this paper is a unique opportunity for deep experimentalinvestigations on large hydro and wind generators. It is designedto deal with the current as well as future research topics in thefield of wind and hydro generators and their interactions withpower electronic devices and electrical grid.

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Noncontrolled fault current limiter with reactive power support for transient stability improvement of DFIG ‐based variable speed wind generator during grid faults

Fdaili

Essadki

Kharchouf

et al. 2021

Int Trans Electr Energ Syst

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Summary According to the recent grid codes, wind turbine systems (WTSs) are required to stay connected to the grid during grid faults and provide reactive power to support the grid. Therefore, this paper proposes a noncontrolled fault current limiter (NCFCL) with reactive power support for transient stability improvement of DFIG‐based WTSs under grid faults. The proposed NCFCL is based on a nonsuperconducting reactor located in the rotor side. The NCFCL considerably limits the rotor and stator overcurrents and improves the transient stability of the doubly fed induction generator (DIFG). In addition, the proposed strategy reduces DC‐link overvoltage and electromagnetic torque oscillations and also provides reactive power to the grid to support the grid voltage recovery. In this way, the fault ride‐through (FRT) requirements of the latest grid codes can be fulfilled without affecting the DFIG stability in normal operation. Simulation studies using MATLAB/Simulink‐2019a are performed on a 2‐MW DFIG‐based WTS to confirm the effectiveness and feasibility of the proposed FRT strategy. Simulation results reveal that the proposed strategy provides better performance compared to the crowbar protection to improve the FRT capability.

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Performance of new solid-state fault current limiter for transient stability enhancement of DFIG based wind generator

Cited by 9 publications

References 14 publications

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

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

Characterization of a Large Electrical Machine Test

Noncontrolled fault current limiter with reactive power support for transient stability improvement of DFIG ‐based variable speed wind generator during grid faults

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