Improving Fault Ride-Through Capability of DFIG-Based Wind Turbine Using Superconducting Fault Current Limiter

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 first term, e r f , is due to grid voltage, shown in Equation (12). The second term, e rn , shown in Equation (13)…”

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

confidence: 99%

“…Other strategies have been proposed using a superconducting resistive current limiter (SCL) between DFIG and grid [12,13]. It reduces fault current level at the stator side and improves the fault ride-through capability of the system.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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“…Some configuration of the FCLs are employed to increase the LVRT capability of the DFIG based wind turbine in the power network [22][23][24][25]. A three phase FCL including an isolation transformer and a large DC inductance with a bypass resistance located in the stator side of the DFIG is used to restrict the fault current level [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…A single phase bridge type FCL is utilized in the terminal of the DFIG to improve the LVRT capability of the DFIG during all gird faults [24]. Superconducting FCL is also interesting in limiting the fault current in the DFIG [25]. Despite of the mentioned FCLs for the LVRT improvement of the DFIG, various types of FCLs are also employed to improve power system operation during power system faults (PSFs) in the literature [26]- [30].…”

Section: Introductionmentioning

confidence: 99%

Low voltage ride-through enhancement of DFIG-based wind turbine using DC link switchable resistive type fault current limiter

Naderi

Negnevitsky

Jalilian

et al. 2017

International Journal of Electrical Power & Energy Systems

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, "Low voltage ride-through enhancement of DFIGbased wind turbine using DC link switchable resistive type fault current limiter," International Journal of Electrical Power and Energy Systems, vol. 86, pp. 104-119, 2017. Low voltage ride-through enhancement of DFIG-based wind turbine using DC link switchable resistive type fault current limiter Abstract Doubly-fed induction generator (DFIG)-based wind turbines utilise small-scale voltage sourced converters with a limited overcurrent withstand capability, which makes the DFIG-based wind turbines very vulnerable to grid faults. Often, modern DFIG systems employ a crowbar protection at the rotor circuit to protect the rotor side converter (RSC) during grid faults. This method converts the DFIG to a squirrel cage induction generator, which does not comply with the new grid codes. The recent grid codes need wind turbines to stay connected to the utility grid during and after power system faults, especially in high penetration level of wind power. Furthermore, the crowbar switch is expensive. This paper proposes a novel DC-link switchable resistive-type fault current limiter (SRFCL) to improve the LVRT capability of the DFIG. The proposed SRFCL is employed in the DC side of the RSC. The SRFCL solves crowbar protection activation problems and eliminates subsequent complications in the DFIG system. The proposed SRFCL does not have any significant impact on the overall performance of the DFIG during normal operation. Whenever the fault, whether symmetrical or asymmetrical, occurs, the SRFCL not only limits rotor over-currents but also prevents rotor speed acceleration and restricts high torque oscillations even during zero grid voltage, as recommended by some grid codes. To prove the effective operation of the SRFCL on the RSC fault current limitation, analytical analysis is performed in each switching interval. The proposed approach is compared with the crowbar-based protection method. Simulation studies are carried out in PSCAD/EMTDC software. In addition, a prototype is provided to demonstrate the main concept of the proposed approach. Simulation studies are carried out in PSCAD/EMTDC software. In addition, a prototype is provided to demonstrate the main concept of the proposed approach.

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“…In [11][12][13][14][15][16], SFCLs such as resistive type and bridge type are used to enhance the operational stability of a wind power plant, and the application feasibility of the SFCLs can be preliminarily confirmed. In [17][18][19], theoretical and simulation studies are performed to explore the performance of the resistive SFCL used in a microgrid system, which is composed of multiple distributed renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

Development of a Voltage Compensation Type Active SFCL and Its Application for Transient Performance Enhancement of a PMSG-Based Wind Turbine System

Chen

Yang

et al. 2017

Advances in Condensed Matter Physics

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Considering the rapid development of high temperature superconducting (HTS) materials, superconducting power applications have attracted more and more attention in the power industry, particularly for electrical systems including renewable energy. This paper conducts experimental tests on a voltage compensation type active superconducting fault current limiter (SFCL) prototype and explores the SFCL's application in a permanent-magnet synchronous generator-(PMSG-) based wind turbine system. The SFCL prototype is composed of a three-phase air-core superconducting transformer and a voltage source converter (VSC) integrated with supercapacitor energy storage. According to the commissioning test and the current-limiting test, the SFCL prototype can automatically suppress the fault current and offer a highly controlled compensation voltage in series with the 132 V electrical test system. To expand the application of the active SFCL in a 10 kW class PMSG-based wind turbine system, digital simulations under different fault cases are performed in MATLAB/Simulink. From the demonstrated simulation results, using the active SFCL can help to maintain the power balance, mitigate the voltage-current fluctuation, and improve the wind energy efficiency. The active SFCL can be regarded as a feasible solution to assist the PMSG-based wind turbine system to achieve low-voltage ride-through (LVRT) operation.

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Improving Fault Ride-Through Capability of DFIG-Based Wind Turbine Using Superconducting Fault Current Limiter

Cited by 126 publications

References 14 publications

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

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

Low voltage ride-through enhancement of DFIG-based wind turbine using DC link switchable resistive type fault current limiter

Development of a Voltage Compensation Type Active SFCL and Its Application for Transient Performance Enhancement of a PMSG-Based Wind Turbine System

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