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

Phan, Van-Tung; Logenthiran, T.; Woo, Wai Lok; Atkinson, Dave; Pickert, Volker

doi:10.1016/j.ijepes.2015.08.020

Cited by 19 publications

(5 citation statements)

References 37 publications

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“…Doubly fed induction generator (DFIG) is one of the widely used generators in variable speed wind turbines due to features of flexibility and controllability (using fractional rated power converters) and the ability of the slip change in a wide range [1][2][3]. In recent decades, many research works have been dedicated to the control methods, the optimal operation, the stability improvement, and the fault-tolerant capability of doubly-fed induction generator-based wind turbines (DFIG-WTs) in the AC grid [3][4][5][6][7][8][9]. In reference [3], the author has introduced a coordinated control method for the grid-side and rotor-side converters (GSC and RSC) of the DFIG-WT to result in proper grid voltage support and optimal reactive power-sharing between the GSC and RSC.…”

Section: Introductionmentioning

confidence: 99%

Various Control Strategies Performance Assessment of the DFIG wind turbine connected to a DC grid

Akhbari

Rahimi

Khooban

2023

IET Electric Power Appl

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This paper deals with the integration and control of the doubly fed induction generatorbased wind turbine (DFIG-WT) in a DC grid. In this way, the stator of the DFIG-WT is integrated with the DC grid via an uncontrolled diode-bridge rectifier as well as a buck converter to provide a flexible connection path. In addition, the rotor of the DFIG-WT exchanges power with the DC grid through a rotor-side converter (RSC). By considering the DFIG-WT system topology, three control strategies based on the stator flux-oriented vector control are developed for the RSC and buck converter. The control schemes consist of the outer and the inner control loops with the proportional-integral (PI) controllers. Additionally, the stability of control strategies and their dependence on the generator parameters are evaluated and compared using modal analysis and numerical simulations in the MATLAB/SIMULINK environment. Finally, a real-time hardware-inthe-loop emulation-based OPAL-RT 5600 is accomplished to assess the performance of the superior control method from a practical perspective.

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Section: Introductionmentioning

confidence: 99%

Various Control Strategies Performance Assessment of the DFIG wind turbine connected to a DC grid

Akhbari

Rahimi

Khooban

2023

IET Electric Power Appl

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“…The model predictive control (MPC) [14][15][16] has the advantages including easy implementation, high control accuracy and fast dynamic response; thus, it is applied to realise the DSPC [17][18][19], DSCC [20,21] and DRCC [22][23][24]. Variations of the stator power, stator current and rotor current during the control period with the applied rotor voltage are predicted, based on which the required rotor voltages to realise corresponding control goals are thus determined [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Analytical LVRT analysis of doubly fed induction generator with MPC‐basedDSCC/DRCC

Huang

Sun

2019

IET Renewable Power Generation

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Under the low-voltage ride-through (LVRT) of the doubly fed induction generator, extra efforts are required for the model predictive control (MPC)-based direct stator/rotor current controls (DSCC/DRCC) against the stator flux oscillation. Constant stator/rotor currents are maintained at the cost of rotor/stator current oscillations, respectively, due to stator flux oscillation. Necessity to incorporate the stator flux transient in the MPC-based DSCC/DRCC under the LVRT is analysed based on tracking effects of the current references. To quantify LVRT effect with the MPC-based DSCC/DRCC, analytical expressions of the stator current, rotor current and rotor voltage are proposed, whose accuracy is validated based on comparison with the time-domain simulations. On the basis of analytical study, advantages and disadvantages of the DSCC/DRCC are analysed considering impacts of the current oscillations on the security of the rotor-side converter. With the DRCC, rotor voltage increase is suppressed with damping to the stator flux oscillation and rotor current constraint is satisfied without decreasing stator output power; thus, the LVRT effect is desirable compared with the DSCC. The MPC-based DSCC/DRCC is extended to LVRT under the asymmetrical fault to realise effective control to both the positive and negative sequence stator/rotor currents.

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“…For instance, in [17], the design of PI-R2 controller was carried out in continuous time by means of a trial and error process aided by Bode plots, and after implemented by means of continuous-to-discrete time transformation. Due to this difficulty, [5,7,[18][19][20] moved to predictive and adaptive control approaches in order to achieve easier tuning and improved performance. Therefore, there still lacks an effective resonant controller able to track/reject oscillatory references/disturbances with comprehensive and concise parameter design.…”

Section: Introductionmentioning

confidence: 99%

Heightened state-feedback predictive control for DFIG-based wind turbines to enhance its LVRT performance

Taveiros

Barros

2019

International Journal of Electrical Power & Energy Systems

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

Cited by 19 publications

References 37 publications

Various Control Strategies Performance Assessment of the DFIG wind turbine connected to a DC grid

Various Control Strategies Performance Assessment of the DFIG wind turbine connected to a DC grid

Analytical LVRT analysis of doubly fed induction generator with MPC‐basedDSCC/DRCC

Heightened state-feedback predictive control for DFIG-based wind turbines to enhance its LVRT performance

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