Dynamic Modeling and Improved Control of DFIG Under Distorted Grid Voltage Conditions

Hu, Jiabing; Nian, Heng; Xu, Hailiang; He, Yikang

doi:10.1109/tec.2010.2071875

Cited by 197 publications

(158 citation statements)

References 19 publications

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“…Especially under unbalanced grid voltage conditions, the DFIG system is not effective enough to isolate its connection with the grid. As a result, the unbalanced grid voltage leads to unbalanced stator current and rotor current, causing stator winding and rotor winding to generate uneven heat and inducing pulsation in the torque of the generator, which results in oscillation of the power passing to the grid [10,11]. Meanwhile, the output current and power fluctuate at double the grid frequency in the synchronous frame; however, the PI regulator cannot Energies 2017, 10, 1139 2 of 13 realize zero steady-state error in this situation, which affects stable operation of the DFIG system and the grid.…”

Section: Introductionmentioning

confidence: 99%

Passivity-Based Control of a Doubly Fed Induction Generator System under Unbalanced Grid Voltage Conditions

Huang

Wang

2017

Energies

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According to the theory of passivity-based control (PBC), this paper establishes a port-controlled Hamiltonian system with dissipation (PCHD) model for a doubly fed induction generator (DFIG) system under unbalanced grid voltage conditions and proposes a method of interconnection and damping assignment passivity-based control (IDA-PBC) of the system under such conditions. By using this method, the rotor-side converter and grid-side converter can be controlled simultaneously in order to improve fault ride-through capability of the DFIG system. Simulation results indicate that this IDA-PBC strategy effectively suppresses fluctuations of output current and power in the DFIG system during unbalanced grid voltage sag/swell, enhances dynamic performance, and improves the robustness of the system.

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Section: Introductionmentioning

confidence: 99%

Passivity-Based Control of a Doubly Fed Induction Generator System under Unbalanced Grid Voltage Conditions

Huang

Wang

2017

Energies

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“…As the mechanical power output from the wind turbine is very fluid, the electric power generated by the wind generator will also be very volatile. [1,2,3,4] This poses many problems for administrators of the energy system for two reasons: it is necessary to ensure the balance between powers generated and power consumption. So the wind generator should provide the energy that the consumer demands; nothing more or less.…”

Section: Introductionmentioning

confidence: 99%

DTC-SVPWM of an Energy Storage Flywheel Associated with a Wind Turbine Based on the DFIM

et al. 2017

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In this article we will control the energy storage inertial noted inertial energy storage system to partner with a wind energy conversion system that aims to improve the power quality transit network. Inertial storage is considered a flywheel coupled to an induction motor and controlled by a voltage inverter type power converter. First step, a model of inertial energy storage system (flywheel + asynchronous machine) is presented, then two control methods are proposed: the direct torque control (DTC and DTCconventional SVPWM) (space vector pulse with modulation). The two control methods give similar performance, but the DTC-SVPWM requires less computation time. The two regulators and the proportional integrator SVPWM technique were used to determine the switching frequency. Using direct control with vector modulation strategy has enabled the inertial energy storage system of demonstrating good continuation even under rather severe operating conditions, and the torque ripples are significantly reduced compared to the case of conventional DTC. Then we come to the presentation of simulation results obtained.

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“…The operation and control of such remote wind turbines under non-ideal voltage conditions, including severe voltage sags, network unbalance, and harmonic voltage distortions, have attracted more and more attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. With many excellent merits such as low rating converter capacity, variable speed constant frequency operation and independent power regulation capability, wind turbines based on doubly-fed induction generators (DFIGs) have become one of the mainstream types of variable speed wind turbine in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the overall operation performance of the whole DFIG system can be improved by coordinately controlling the rotor-side converter (RSC) and parallel grid-side converter (PGSC) during a network unbalance, and some enhanced operation functionalities such as eliminating the oscillations in the active or reactive power from the whole system, or suppressing the negative-sequence currents injected to the grid have been achieved [6,11]. To further improve the operation performance of DFIG system under distorted grid voltage conditions, some enhanced control strategies for the DFIG have been studied in [13,14]. As mentioned in [14], a rotor current PI regulator and a harmonic resonant compensator tuned at six times the grid frequency in the positive (dq) + reference frame are designed to provide different operation functionalities, i.e., removing the stator or rotor current harmonics, or eliminating the oscillations at six times the grid frequency in the stator output active and reactive powers.…”

Section: Introductionmentioning

confidence: 99%

“…To further improve the operation performance of DFIG system under distorted grid voltage conditions, some enhanced control strategies for the DFIG have been studied in [13,14]. As mentioned in [14], a rotor current PI regulator and a harmonic resonant compensator tuned at six times the grid frequency in the positive (dq) + reference frame are designed to provide different operation functionalities, i.e., removing the stator or rotor current harmonics, or eliminating the oscillations at six times the grid frequency in the stator output active and reactive powers. However, due to the limited RSC control variables, the proposed method cannot eliminate the stator and rotor current harmonics and the output power pulsations in the DFIG simultaneously under network harmonic distortions.…”

Section: Introductionmentioning

confidence: 99%

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Coordinated Control of a DFIG-Based Wind-Power Generation System with SGSC under Distorted Grid Voltage Conditions

Chen

et al. 2013

Energies

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This paper presents a coordinated control method for a doubly-fed induction generator (DFIG)-based wind-power generation system with a series grid-side converter (SGSC) under distorted grid voltage conditions. The detailed mathematical models of the DFIG system with SGSC are developed in the multiple synchronous rotating reference frames. In order to counteract the adverse effects of the voltage harmonics upon the DFIG, the SGSC generates series compensation control voltages to keep the stator voltage sinusoidal and symmetrical, which allows the use of the conventional vector control strategy for the rotor-side converter (RSC), regardless of grid voltage harmonics. Meanwhile, two control targets for the parallel grid-side converter (PGSC) are identified, including eliminating the oscillations in total active and reactive power entering the grid or suppressing the fifth-and seventh-order harmonic currents injected to the grid. Furthermore, the respective PI-R controller in the positive synchronous reference frame for the SGSC voltage control and PGSC current control have been developed to achieve precise and rapid regulation of the corresponding components. Finally, the proposed coordinated control strategy has been fully validated by the simulation results of a 2 MW DFIG-based wind turbine with SGSC under distorted grid voltage conditions. Keywords: wind-power generation; doubly-fed induction generator (DFIG); distorted grid voltage; series grid-side converter (SGSC); coordinated control PGSC output active and reactive powers. P series and Q series Active and reactive powers through SGSC. P total and Q total Total output active and reactive powers of the DFIG system with SGSC.

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Dynamic Modeling and Improved Control of DFIG Under Distorted Grid Voltage Conditions

Cited by 197 publications

References 19 publications

Passivity-Based Control of a Doubly Fed Induction Generator System under Unbalanced Grid Voltage Conditions

Passivity-Based Control of a Doubly Fed Induction Generator System under Unbalanced Grid Voltage Conditions

DTC-SVPWM of an Energy Storage Flywheel Associated with a Wind Turbine Based on the DFIM

Coordinated Control of a DFIG-Based Wind-Power Generation System with SGSC under Distorted Grid Voltage Conditions

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