Rotor Current Feedback Based Direct Power Control of a Doubly Fed Induction Generator Operating with Unbalanced Grid

Pura, Piotr; Iwański, Grzegorz

doi:10.3390/en14113289

Cited by 19 publications

(17 citation statements)

References 30 publications

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“…A variable STA method was proposed to improve the DARPC strategy of ASG-based wind power [20]. In [21] it is presented a decoupled DARPC technique of the ASG connected to an unbalanced power grid, executed in an orthogonal stationary reference frame related to the stator side. In [22], the voltage modulated DARPC method (VM-DARPC) was proposed to control the ASG-based wind turbines.…”

Section: Introductionmentioning

confidence: 99%

“…In Table 2, we present a comparative summary of the two types of DARPC techniques used in this work. Figures [21][22][23], illustrate the zooms on the stator active power, electromagnetic torque and current of the GADA. From these figures, it can be seen that the undulations at these curves are always minimized for the TSC-DARPC with NMSVM technique compared to DARPC with PI controllers.…”

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confidence: 99%

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Terminal Synergetic Control for Direct Active and Reactive Powers in Asynchronous Generator-Based Dual-Rotor Wind Power Systems

Benbouhenni

Bizon

2021

Electronics

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A terminal synergetic control (TSC) is designed in this work for a rotor side converter (RSC) of asynchronous generator (ASG)-based dual-rotor wind power (DRWP) systems. The design is based on a novel sliding manifold and aims at improving the ASG performance while minimizing active and reactive power undulations. The method performance and its effectiveness were studied under harmonic distortion (THD) of current, parameter variations and power undulations. Simulation results, carried out using Matlab software, confirmed the system’s robustness against parameter variations and its effectiveness in power undulations. The performance of the designed technique was further compared to that of integral-proportional (PI) controllers in terms of parameter variations, power undulations and THD value of current. While both controllers were able to reduce the effects of power undulations and protect the rotor circuit against over-currents, the proposed TSC was shown to be more effective than the classical PI controller in tracking power and minimizing the undulations effect.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Terminal Synergetic Control for Direct Active and Reactive Powers in Asynchronous Generator-Based Dual-Rotor Wind Power Systems

Benbouhenni

Bizon

2021

Electronics

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“…Under usual working conditions, the GSC maintains a constant voltage at the dc-link and also maintains the needed power factor at the grid, by suitably controlling the active and reactive power. A widely used control structure for GSC control is derived from [27][28][29][30][31] and the control configuration is as depicted in Figure 3. In Figure 3, V bus and V bus * represent the dc-link voltage and its reference value, respectively, whereas θ grid represents the phase angle extracted from the grid voltages using a phase-locked loop.…”

Section: Grid Side Converter Controlmentioning

confidence: 99%

Coordinated Control of Wind Energy Conversion System during Unsymmetrical Fault at Grid

Ahuja

Singh²,

Sharma

et al. 2022

Energies

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High penetration of wind power into the grid necessitates the coordinated action of wind energy conversion systems and the grid. A suitable generation control is required to fulfill the grid integration requirements, especially during faults. A system using a pair of voltage source converters with a squirrel cage induction generator coupled to a wind turbine is proposed to provide fault ride-through during grid faults. A threefold action is used for providing the effective fault ride-through via coordinated action of the machine side and the grid side converter. The entire wind energy conversion system is controlled such that the wind turbine remains connected even during the faults. To implement the threefold action: (i) A decoupled current controller is placed in the grid side converter, which separately controls the positive and negative sequence currents arising during faults. The grid side converter controller is capable of eliminating the double frequency oscillations at the dc-link voltage and, hence, real power, which arises during the unsymmetrical faults; (ii) Reactive power injection is additionally provided by the grid side converter for better grid support; and (iii) The vector control technique is used in machine side converter along with the droop control to adjust the generator speed and the torque resulting in actuation of the pitch control mechanism to limit power generation without shutdown of the turbine.

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“…If the Naslin polynomial method is to be deployed at the first stage, a PR (not P-MR) controller is to be used. An example of such a workflow is mentioned in [29], in which selected controllers are tuned employing the trial and error method with the starting point obtained from the Naslin polynomial approach. The second stage is there to increase robustness in the presence of less significant plant poles neglected during the first stage (the analytical solution assumes a first order plant (5), thus only the dominant pole is taken into account).…”

Section: Proportional-multiresonant Current Controllermentioning

confidence: 99%

Robust Tuning of Multiresonant Current Controllers for Grid-Tied Converters and Erroneous Use of the Naslin Polynomial Method

2022

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The majority of the paper is devoted to debunking flawed methods proposed in the literature within the context of multiresonant control systems for grid-connected converters and then a novel approach is proposed. Several flawed approaches to grid tied power electronic converters (rectifiers and shunt active power filters) are discussed to initiate a critical discussion regarding some tuning methods reported in the topical literature. In this paper we analytically show that some of them are even erroneous from the control theory point of view or are based on mathematically erroneous derivations. That is especially prevalent for papers in which the Naslin polynomial method is employed to tune proportional-multiresonant controllers. Some authors recognize that the resulting control systems are not robust, i.e. not practical, and use obtained gains only as a starting point for further tuning using the trial and error method or evolutionary global optimization. Robustness of such systems is often not guaranteed and if it occurs at all, it is by chance or thanks to a combination of luck and expert knowledge of the engineer (not by deliberate design). Therefore, the absence of such a guarantee motivates the search for better ways to tune such controllers. As a result, a practical robust controller tuning method for multiresonant grid current controllers is proposed and verified experimentally. We are convinced that one of the solutions can be based on the disk margin stability analysis and a global search algorithm. The required robustness is expressed as stability margins. The design procedure is very user-friendly and the disk size is the key design parameter to be selected by an engineer. The practicality of the tuning method is demonstrated empirically in a 10 kVA physical grid-tied converter.INDEX TERMS grid-tied converter; multiresonant controllers; robust control; Naslin polynomial method; disk margin analysis; evolutionary global optimization Nomenclature I. INTRODUCTION

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Rotor Current Feedback Based Direct Power Control of a Doubly Fed Induction Generator Operating with Unbalanced Grid

Cited by 19 publications

References 30 publications

Terminal Synergetic Control for Direct Active and Reactive Powers in Asynchronous Generator-Based Dual-Rotor Wind Power Systems

Terminal Synergetic Control for Direct Active and Reactive Powers in Asynchronous Generator-Based Dual-Rotor Wind Power Systems

Coordinated Control of Wind Energy Conversion System during Unsymmetrical Fault at Grid

Robust Tuning of Multiresonant Current Controllers for Grid-Tied Converters and Erroneous Use of the Naslin Polynomial Method

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