Efficient fault-ride-through control strategy of DFIG-based wind turbines during the grid faults

Mohammadi, Jafar; Afsharnia, Saeed; Vaez‐Zadeh, Sadegh

doi:10.1016/j.enconman.2013.10.029

Cited by 99 publications

(55 citation statements)

References 28 publications

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“…However, since the transient process of the DFIG is owe damped; this will result in the grid voltage becoming lower, because when the crowbar is in operation, the insulated-gate bipolar transistors (IGBTs) of the converters will quit, and the DFIG behaves like a squirrel-cage induction machine, absorbing a large amount of reactive power from the grid [6]. In addition, to select a reasonable value for the crowbar resistance is important.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Fuzzy-optimization of Crowbar Resistances for the Low-Voltage Ride-through of Doubly Fed Induction Wind Turbine Generation Systems

Zhang¹,

Zhang²,

Yang³

2015

Journal of Power Electronics

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This study investigates the multi-objective fuzzy optimization of crowbar resistance for the doubly fed induction generator (DFIG) low-voltage ride-through (LVRT). By integrating the crowbar resistance of the crowbar circuit as a decision variable, a multi-objective model for crowbar resistance value optimization has been established to minimize rotor overcurrent and to simultaneously reduce the DFIG reactive power absorbed from the grid during the process of LVRT. A multi-objective genetic algorithm (MOGA) is applied to solve this optimization problem. In the proposed GA, the value of the crowbar resistance is represented by floating-point numbers in the GA population. The MOGA emphasizes the non-dominated solutions and simultaneously maintains diversity in the non-dominated solutions. A fuzzy-set-theory-based is employed to obtain the best solution. The proposed approach has been evaluated on a 3 MW DFIG LVRT. Simulation results show the effectiveness of the proposed approach for solving the crowbar resistance multi-objective optimization problem in the DFIG LVRT.

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Section: Introductionmentioning

confidence: 99%

Multi-objective Fuzzy-optimization of Crowbar Resistances for the Low-Voltage Ride-through of Doubly Fed Induction Wind Turbine Generation Systems

Zhang¹,

Zhang²,

Yang³

2015

Journal of Power Electronics

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“…So, further attention has to be paid to eventual consequences of possible malfunctions in order to avoid outages. As wind energy is increasingly integrated into power systems the electric grid stability and power quality may be threatened [15]. The stability threaten is due not only to the intermittence and variability of wind energy, but also to malfunctions on the power electronic parts of the WECS, leading to a non anticipated shutdown.…”

Section: Introductionmentioning

confidence: 99%

Blade pitch control malfunction simulation in a wind energy conversion system with MPC five-level converter

et al. 2016

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This paper is on a wind energy conversion system simulation of a transient analysis due to a blade pitch control malfunction. The aim of the transient analysis is the study of the behavior of a back-to-back multiple point clamped five-level full-power converter implemented in a wind energy conversion system equipped with a permanent magnet synchronous generator. An alternate current link connects the system to the grid. The drive train is modeled by a three-mass model in order to simulate the dynamic effect of the wind on the tower. The control strategy is based on fractional-order control. Unbalance voltages in the DC-link capacitors are lessen due to the control strategy, balancing the capacitor banks voltages by a selection of the output voltage vectors. Simulation studies are carried out to evaluate not only the system behavior, but also the quality of the energy injected into the electric grid. © 2015 Elsevier Ltd. All rights reserved.Keywords: Wind energy; five-level power converter; drive train; fractional-order control; simulation. IntroductionEnvironmental problems such as global warming and habitat preservation have to be faced by the society in nowadays in order to achieve a sustainable development. One of the causes for the global warming is said to be the increase on the level of CO 2 in the atmosphere due to fossil fuel burning [1]. However, nowadays fossil fuel burning is needed for supplying the majority of the energy demand [2]. Research and development is on the way to achieve lower pollutants emissions on conversion of energy to convenient forms of usage in order to achieve a sustainable development. Conversion of energy from renewable energy sources are in nowadays a political attractive option [3] and a wind energy conversion system (WECS) is an economically viable exploitation [4], experiencing a significant expansion [5,6]. Although, onshore WECS deployments are cheaper than offshore ones, new suitable available onshore sites for deployments are becoming scarce, particularly in Europe [7]. So, the offshore WECS is becoming a further attractive option.

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“…Some studies in the literature [13][14][15][16] have discussed advanced control strategies for the LVRT solutions of the DFIG. In [13], an efficient method with active and passive FRT compensators has been proposed that more measurements and two control strategy are required to the LVRT of the DFIG.…”

Section: Introductionmentioning

confidence: 99%

“…In [13], an efficient method with active and passive FRT compensators has been proposed that more measurements and two control strategy are required to the LVRT of the DFIG. Novel hybrid controllers in the (dq) + and rotor reference frames have been studied in [14], which only considered the asymmetrical grid faults.…”

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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Efficient fault-ride-through control strategy of DFIG-based wind turbines during the grid faults

Cited by 99 publications

References 28 publications

Multi-objective Fuzzy-optimization of Crowbar Resistances for the Low-Voltage Ride-through of Doubly Fed Induction Wind Turbine Generation Systems

Multi-objective Fuzzy-optimization of Crowbar Resistances for the Low-Voltage Ride-through of Doubly Fed Induction Wind Turbine Generation Systems

Blade pitch control malfunction simulation in a wind energy conversion system with MPC five-level converter

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

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