Design of an output LC filter for a doubly fed induction generator supplying non-linear loads for aircraft applications

Khatounian, Flavia; Berthereau, F.; Louis, J. P.

doi:10.1109/isie.2004.1571966

Cited by 17 publications

(8 citation statements)

References 14 publications

(4 reference statements)

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“…Consequently, the required U + sdq + , U − sdq − , U 5− sdq 5− , and U 7+ sdq 7+ are obtained and the rotor current references can then be calculated accurately with (13), (14), (15), and (16), respectively.…”

Section: Sequential Decomposition Of Stator Voltagementioning

confidence: 99%

“…Similarly, system control and operation of DFIG systems under distorted grid voltage conditions were initially studied in [15]- [19]. An output LC filter, used for suppressing the current harmonics of DFIG under nonlinear loads in the aircraft applications, was designed with simulation results for illustrating the feasibility of the proposed control strategy [15].…”

mentioning

confidence: 99%

“…An output LC filter, used for suppressing the current harmonics of DFIG under nonlinear loads in the aircraft applications, was designed with simulation results for illustrating the feasibility of the proposed control strategy [15]. However, extra hardware cost would be added.…”

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confidence: 99%

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Integrated Modeling and Enhanced Control of DFIG Under Unbalanced and Distorted Grid Voltage Conditions

Xu¹,

He³

2012

IEEE Trans. Energy Convers.

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This paper focuses on the enhanced control and improved fault-ride-through capability of a doubly fed induction generator (DFIG)-based wind turbine system under both unbalanced and distorted grid voltage conditions. A more integrated mathematical model of DFIG is first set up with both the negativesequence and the low-order harmonic grid voltages considered. Based on the developed model, the instantaneous active/reactive powers and electromagnetic toque are redefined in detail. Besides, four alternative control targets and their corresponding rotor current references are calculated and assigned. A novel current controller, consisting of a conventional PI regulator and a dualfrequency resonant (DFR) compensator, tuned at twice and six times the grid frequency, named PI-DFR controller, is designed to regulate the fundamental and the fifth-and seventh-order harmonic components simultaneously. Experiment studies verify the correctness of the developed model and the effectiveness of the suggested control strategies in improving the fault-ride-through capability of a DFIG system under such adverse grid conditions. Index Terms-Control, doubly fed induction generator (DFIG), modeling, unbalanced and distorted grid voltage conditions, wind power. NOMENCLATURE U s , U r Stator, rotor voltage vectors. I s , I r Stator, rotor current vectors. ψ s , ψ r Stator, rotor flux linkage vectors. ω 1 , ω r , ω s Stator, rotor, and slip angular frequencies. P s , Q s Stator output active and reactive powers. L s ,L r Stator, rotor self-inductances. L σ s ,L σ r Stator, rotor leakage inductances. L m Mutual inductance. R s ,R r Stator, rotor resistances. θ s ,θ r Stator voltage angle, rotor angle. Subscripts d, q Synchronous dq axis.

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Section: Sequential Decomposition Of Stator Voltagementioning

confidence: 99%

mentioning

confidence: 99%

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Integrated Modeling and Enhanced Control of DFIG Under Unbalanced and Distorted Grid Voltage Conditions

Xu¹,

He³

2012

IEEE Trans. Energy Convers.

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“…To produce a sinusoidal voltage v P , a compensation method with an LC passive filter placed on the stator side was developed in [17] and [18]. Generally, a stand-alone DFIG system can be controlled by inverter systems in order to produce a desired output voltage to eliminate harmonics mentioned earlier.…”

Section: A Harmonic Problem In Stand-alone Dfigmentioning

confidence: 99%

“…In [16], the effect of harmonics of the auxiliary diode rectifier load on the control system in a stand-alone DFIG was investigated, but no compensation of harmonics and design of an LC filter were shown. A control scheme with an LC output filter was designed to remove harmonics due to the influence of nonlinear load for the DFIG in aircraft applications [17]. However, the installation of an LC filter at the stator side had many drawbacks such as resonance and parameters tuning problem in which the latter disadvantage was depending on the impedance of the generator.…”

Section: Introductionmentioning

confidence: 99%

Control Strategy for Harmonic Elimination in Stand-Alone DFIG Applications With Nonlinear Loads

Phan

Lee

2011

IEEE Trans. Power Electron.

118

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This paper proposes a new control strategy of effective fifth and seventh harmonic elimination in the stator output voltage at the point of common coupling for a stand-alone doubly fed induction generator (DFIG) feeding a three-phase diode rectifier. This load regularly causes such harmonic distortions, which harmfully affect the performance of other loads connected to the DFIG. In order to allow the DFIG to deliver a pure sinusoidal stator output voltage, these harmonics must be rejected. The proposed elimination method is investigated based on the rotor current controller employing a proportional integral and a resonant controller, which is implemented in the fundamental reference frame. In this frame, both positive seventh and negative fifth voltage harmonic can be eliminated by using only single resonant compensator tuned at six multiples of synchronous frequency in the rotor current controller. The control scheme is developed in the rotor-side converter for the control and operation of the DFIG. Simulations and experimental results with 2.2-kW DFIG feeding a nonlinear load are shown to verify prominent features of the proposed control method.Index Terms-Doubly fed induction generator (DFIG), nonlinear loads, resonant controller, stand-alone system, wind turbine system. NOMENCLATUREv s , v r Induced stator voltage and rotor voltage. v P Stator output voltage at the point of common coupling. v N S The nonlinear voltage drop on the internal stator impedance. V dc DC-link voltage. i s , i r , i m s Stator current, rotor current, and stator magnetizing current. λ s , λ r Stator and rotor fluxes. L s , L r , L m Stator, rotor, and mutual inductances. R s , R r Stator and rotor resistences. ω s , ω r , ω sl Synchronous, rotational rotor, and slip speeds. θ s , θ r , θ sl Synchronous, rotational rotor, and slip angles. σ Total leakage factor. d/dt, Δ Differential operator and error value.

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Analysis and compensation of voltage unbalance of a DFIG using predictive rotor current control

Phan

Logenthiran

Woo

et al. 2016

International Journal of Electrical Power & Energy Systems

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Design of an output LC filter for a doubly fed induction generator supplying non-linear loads for aircraft applications

Cited by 17 publications

References 14 publications

Integrated Modeling and Enhanced Control of DFIG Under Unbalanced and Distorted Grid Voltage Conditions

Integrated Modeling and Enhanced Control of DFIG Under Unbalanced and Distorted Grid Voltage Conditions

Control Strategy for Harmonic Elimination in Stand-Alone DFIG Applications With Nonlinear Loads

Analysis and compensation of voltage unbalance of a DFIG using predictive rotor current control

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