Torque Ripple Elimination for Doubly-Fed Induction Motors under Unbalanced Source Voltage

Park, Hong-Geuk; Abo‐Khalil, Ahmed G.; Lee, Dong-Choon; Son, Kwang M.

doi:10.1109/peds.2007.4487872

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…The most discussed method is to use two sets of PI controllers to regulate the positive and negative components of the rotor currents. 25,26 A good performance in the steady-state condition is achieved when PI controllers are used. However, slow response in transient condition, due to the components decomposition, significantly deteriorates the overall system performance.…”

Section: F I G U R E 1 Wind Energy Conversion Systemmentioning

confidence: 99%

“…To minimize the effect of unbalanced grid voltage on the DFIG, different control techniques are discussed in several studies. The most discussed method is to use two sets of PI controllers to regulate the positive and negative components of the rotor currents 25,26 . A good performance in the steady‐state condition is achieved when PI controllers are used.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and control of unbalanced and distorted grid voltage of grid‐connected DFIG wind turbine

Abo‐Khalil

Alharbi

Al‐Qawasmi

et al. 2021

Int Trans Electr Energ Syst

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Summary This paper presents a mathematical modeling and current control of DFIG wind turbine system in the presence of unbalanced and harmonic distortions in the grid voltage. A proportional resonant (PR) current controller is modeled and implemented to reduce the impacts caused by the presence of double‐frequency, fifth and seventh harmonic components in the generator torque, active and reactive power and the grid active power to which the wind generation system is connected. To reduce the impacts of the presence of the harmonics and unbalanced voltage in the stator and grid active and reactive powers, the dq‐axis current components of these harmonics are controlled separately in the rotor and grid side converters. The use of PR controllers represents the addition of a specific function that eliminates the negative sequence and harmonic components from the rotor current components which reduce the oscillations of the generator torque and grid active power. The performance of the proposed control algorithm is validated through experiments and evaluated during the grid disturbances.

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Section: F I G U R E 1 Wind Energy Conversion Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and control of unbalanced and distorted grid voltage of grid‐connected DFIG wind turbine

Abo‐Khalil

Alharbi

Al‐Qawasmi

et al. 2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…Thus, the main state parameters that can be controlled in a wind turbine are generator electromechanical torque, turbine torque, pitch angle, brake system torque, active and reactive power flow, power factor and terminal voltage of the generator. The study of these parameters can be further investigated in [30] - [32]. In this section, three ways of controlling the power produced by the turbine will be presented.…”

Section: Pitch Angle Controlmentioning

confidence: 99%

Wind Turbine Simulation and Control Using Squirrel-Cage Induction Generator for Dfig Wind Energy Conversion Systems

Abo‐Khalil

Sayed

2021

Sohag Engineering Journal

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This work presents the design and implementation of a wind turbine simulator to carry out laboratory tests on the generation, regulation, and control of a wind power conversion system (WECS) with a capacity of 3 kW. A three-phase squirrel-cage induction motor emulates the static and dynamic wind turbine characteristics based on the torque-speed profile of a wind turbine. The Emulator allows all electromechanical tests to be carried out, from the characterization of the generator to the adjustment of controls and protections for equipment operating in a specific location. Initial Emulator tests were successful.

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“…The sequence components are represented by superscripts p and n represent, respectively. The value of the voltage, current, or flux can be expressed as a vector F in the stator-flux-oriented reference frame [34]. If an unbalance occurs in the grid voltage, the apparent power of the stator can be expressed again in consideration of the unbalanced system:…”

Section: A Generator Side Converter Contromentioning

confidence: 99%

Dynamic Control of a DFIG Wind Power Generation System to Mitigate Unbalanced Grid Voltage

2020

Self Cite

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This paper presents an improved control strategy for a doubly-fed induction generator (DFIG) during unbalanced grid voltage conditions. The proposed strategy was applied in both synchronization and grid-connected conditions. The synchronization process is carried by controlling the extracted positive and negative sequence components of the stator q-axis voltage to follow the grid q-axis voltage. This strategy can be accomplished by controlling the positive and negative sequence components of the rotor d-axis current. By perturbing the rotor d-axis current, the stator EMF builds up and follows the grid voltage accurately. The stator frequency and the phase difference between the stator and grid voltage are compensated by adjusting the stator d-axis positive and negative voltage components to zero. After synchronization, the proposed control strategy focuses on regulating the average stator active and reactive power control by controlling the positive components of q and d-axis currents, respectively. The second target is to minimize the generator torque ripple by controlling the rotor negative sequence components. At the same time, the grid side converter is controlled to minimize the grid power pulsations to reduce the impact of the unbalanced grid voltage. This study focuses on enhancing the dynamics of DFIG during the unbalanced grid voltage by using Multivariable State Feedback (MSF) current controllers. Experiments are carried out to validate the performance improvement by using the proposed method. The simulation and experimental results showed superior performance of the proposed control strategy.

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Torque Ripple Elimination for Doubly-Fed Induction Motors under Unbalanced Source Voltage

Cited by 10 publications

References 14 publications

Modeling and control of unbalanced and distorted grid voltage of grid‐connected DFIG wind turbine

Modeling and control of unbalanced and distorted grid voltage of grid‐connected DFIG wind turbine

Wind Turbine Simulation and Control Using Squirrel-Cage Induction Generator for Dfig Wind Energy Conversion Systems

Dynamic Control of a DFIG Wind Power Generation System to Mitigate Unbalanced Grid Voltage

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