Reactive Current Assignment and Control for DFIG Based Wind Turbines during Grid Voltage Sag and Swell Conditions

Xu, Hailiang; Ma, Xiaojun; Sun, Dongchu

doi:10.6113/jpe.2015.15.1.235

Cited by 14 publications

(10 citation statements)

References 25 publications

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“…Subtracting (13) from (16) to obtain the negativesequence reactive current reference of the GSC, yield…”

Section: B Current Reference Constraints Of the Gscmentioning

confidence: 99%

“…And the amount of required positive-sequence reactive current is strictly relevant to the degree of positive sequence voltage sag [13]- [15]. In [16], an adaptive reactive current control scheme is proposed to meet the grid code during symmetric fault condition, on the basis of considering both the limit of the GSC and RSC. In [17], an optimized reactive power flow is proposed in the case where an over-excited reactive power support is applied with the joint compensation from both the RSC and the GSC.…”

Section: Introductionmentioning

confidence: 99%

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Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Zhang

et al. 2020

IEEE Access

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Doubly fed induction generator (DFIG) based wind turbines have been found to be very sensitive to asymmetrical grid fault, wherein the harmful oscillations in the electromagnetic torque has being made a big concern. What makes things harder is that latest grid codes require grid-connected wind turbines to possess the ability of positive-and negative-sequence reactive current supporting. Hence, it becomes a guide mechanism to meet the grid codes and to ensure the operation safety of the wind turbines. Even though a tradeoff could be made between them, it is still quite difficult to coordinate the current dispatch of the DFIG's rotor-and grid-side converters (RSC and GSC), since there are totally eight currents needing to be carefully designed, i.e., the positive-and negative-sequence active and reactive currents in each converter. To address this issue, this paper analyzes the reactive current constraints in detail, based on which a coordinated reactive current control strategy is put forward for the DFIG-based wind turbines during asymmetrical grid condition. Simulation studies demonstrate the effectiveness of the proposed strategy. INDEX TERMS Doubly fed induction generator (DFIG), wind turbine, asymmetrical grid, reactive current support, fault ride-through (FRT).

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“…Subtracting (13) from (16) to obtain the negativesequence reactive current reference of the GSC, yield…”

Section: B Current Reference Constraints Of the Gscmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Zhang

et al. 2020

IEEE Access

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“…There are number of approaches of different computational complexity and accuracy which have been utilized for modeling of DFIG operated WECS [1][2][3][4][5]. Most of them concern electromagnetic models including power electronics converters which are suitable for the detailed study of the power conversion system and its control strategies.…”

Section: Model Of Dfig Operated Wecsmentioning

confidence: 99%

“…The number installed and operated WECS is continuously rising. Nevertheless the exploitation of the wind power is connected with problems of the power system stability and energy quality [1,2]. As the percentage of WECS power starts to be remarkable against other sources in the power systems the methods of controlling of active and reactive power generated by WECS are imminent need [2].…”

Section: Introductionmentioning

confidence: 99%

Active and reactive power regulation in doubly fed asynchronous generator

Jędryczka

Prościak

2018

ITM Web Conf.

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The paper deals with active and reactive power regulation in doubly fed induction generator (DFIG) installed in the wind energy conversion system (WECS). The mathematical model of the studied machine has been proposed and suited for implementation of the field oriented control algorithm (FOC). The control strategy for decoupling the active and reactive power regulation has been proposed and implemented in Matlab/Simulink environment. Selected results of simulations have been presented and discussed.

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“…This results in malfunctions, tripping, or even faults of the load system. Voltage sags, swells, harmonics, unbalances, and flickers are generally considered as critical phenomena of voltage disturbances in distribution systems [1]- [3]. The main reason for voltage sags is short-circuit faults such as line-to-ground faults and line-to-line faults.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Control of Three-Phase Four-Wire DVR Systems using Feedback Linearization

Jeong¹,

Nguyễn²,

Le³

et al. 2016

Journal of Power Electronics

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Power quality is a critical issue in distribution systems, where a dynamic voltage restorer (DVR) is commonly used to mitigate the voltage disturbances for loads. This paper deals with a nonlinear control for the three-phase four-wire (3P-4W) DVR under a grid voltage unbalance and nonlinear loads in the distribution system, where a novel control scheme based on the feedback linearization technique is proposed. Through feedback linearization, a nonlinear model of a DVR with a PWM voltage-source inverter (VSI) and LC filters is linearized. Then, the controller design of the linearized model is performed by applying the linear control theory, where the load voltages are kept constant by controlling the d-q-0 axis components of the DVR output voltages. To keep the load voltage unchanged, an in-phase compensation strategy is employed, where the load voltages are recovered to be the same as the previous voltage without a change in the magnitude. With this strategy, the performance of the DVR becomes faster and more stable even under unbalanced source voltages and nonlinear loads. The validity of the proposed control strategy has been verified by simulation and experimental results.

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Reactive Current Assignment and Control for DFIG Based Wind Turbines during Grid Voltage Sag and Swell Conditions

Cited by 14 publications

References 25 publications

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Reactive Current Constraints and Coordinated Control of DFIG’s RSC and GSC During Asymmetric Grid Condition

Active and reactive power regulation in doubly fed asynchronous generator

High-Performance Control of Three-Phase Four-Wire DVR Systems using Feedback Linearization

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