Parametrically Robust Dynamic Speed Estimation Based Control for Doubly Fed Induction Generator

Bhattarai, Rojan; Gurung, Niroj; Ghosh, Sudipta; Kamalasadan, Sukumar

doi:10.1109/tia.2018.2862643

Cited by 39 publications

(9 citation statements)

References 24 publications

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“…A test system with a DFIG, as shown in Figure 1, was adopted for the numerical analysis. Related parameters of the test system are listed in Table 1 [32]. Parameters of the C p function are given by [33].…”

Section: Numerical Analysismentioning

confidence: 99%

Control of a Variable-Impedance Fault Current Limiter to Assist Low-Voltage Ride-Through of Doubly Fed Induction Generators

et al. 2021

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A fault current limiter (FCL) may be applied to assist the low-voltage ride-through (LVRT) of a doubly fed induction generator (DFIG). FCLs with fixed impedance, lack the flexibility to adjust their impedance to adapt to different LVRT scenarios. The direct switch-in and -out of the fixed-impedance FCL yields transient electromagnetic oscillations in the DFIG, which need to be addressed. In this paper, a variable-impedance FCL is implemented at the stator side of the DFIG to assist its LVRT, and a novel methodology is proposed to control the impedance of the FCL, with which the stator current oscillation is effectively constrained and the smooth switch-out of the FCL is realized to avoid continued active power consumption of the FCL and to restore the DFIG to its pre-fault working condition. Analysis of the LVRT transient is carried out, which lays the foundation for the control methodology to determine the impedance of the FCL based on calculation of the optimization goal. The feasibility and effectiveness of the control to the variable-impedance FCL are verified by the numerical analysis results, which compare the LVRT simulation results with the application of the fixed-impedance and the variable-impedance FCLs.

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Section: Numerical Analysismentioning

confidence: 99%

Control of a Variable-Impedance Fault Current Limiter to Assist Low-Voltage Ride-Through of Doubly Fed Induction Generators

et al. 2021

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“…A2 in the Appendix. The DFIG has the rated power 1.5 MW and rated voltage 690 V. R s = 0.00706 p.u., L σs = 0.17 p.u., R r = 0.005 p.u., L σr = 0.156 p.u., L m = 2.9 p.u., R g = 0.02 p.u., L g = 0.1 p.u., R L1 = 0.006 p.u., L L1 = 0.06 p.u., R L2 = 0.003 p.u., L L2 = 0.03 p.u., R f = 0.001 p.u., k p = 0.5, k i = 0.1 …”

Section: Numerical Analysismentioning

confidence: 99%

Asymmetrical LVRT of DFIG incorporating feed‐forward transient current control and controllable resistive‐type fault current limiter

Huang

2020

IEEJ Transactions Elec Engng

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During the low‐voltage ride‐through (LVRT) of the doubly fed induction generator (DFIG), the change rate of the stator flux is introduced as the feed‐forward compensation (FFC) to prevent the stator flux oscillation from affecting the rotor current control. The dual‐sequence FFC is proposed for the asymmetrical LVRT of the DFIG. To reduce the rotor voltage increase due to the FFC, the controllable resistive‐type fault current limiter (CRTFCL) is implemented at the stator side to improve damping to the stator flux oscillation. The resistance of the CRTFCL is controlled based on the ramp function to relieve oscillations resulted from the switch‐out of the CRTFCL. With the dual‐sequence FFC and CRTFCL applied to the asymmetrical LVRT, analytical expressions of the stator current, rotor current, and rotor voltage are derived. The accuracy of the analytical expressions and the improved LVRT performance with the dual‐sequence FFC and the CRTFCL are verified based on the time‐domain simulations. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…4. The parameters of the test system and the DFIG may be found in [35][36][37] with the experimental verification, as given in Tables 1 and 2.…”

Section: Numerical Analysismentioning

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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Parametrically Robust Dynamic Speed Estimation Based Control for Doubly Fed Induction Generator

Cited by 39 publications

References 24 publications

Control of a Variable-Impedance Fault Current Limiter to Assist Low-Voltage Ride-Through of Doubly Fed Induction Generators

Control of a Variable-Impedance Fault Current Limiter to Assist Low-Voltage Ride-Through of Doubly Fed Induction Generators

Asymmetrical LVRT of DFIG incorporating feed‐forward transient current control and controllable resistive‐type fault current limiter

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

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