Soft and fast starting induction motors using controllable resistive type fault current limiter

Naderi, Seyed Behzad; Negnevitsky, Michael

doi:10.1109/pesgm.2015.7286083

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Z L1 and Z L2 are line impedances and R f is the shorting resistance. R F is the equivalent resistance of CRTFCL at the AC side, which is controlled by applying switching signals of different duty ratios to the switch, as given by

R_{normalF} = \frac{π^{2}}{18} (1 - D) R_{normaldc}

where R dc is the resistance at the DC side, D is the duty ratio.…”

Section: Dual‐sequence Ffc For Rotor Current Control With Crtfcl Durimentioning

confidence: 99%

“…However, when the fixed RTFCL is directly switched out, stator loses voltage support provided by the RTFCL resistance, which may lead to undesired transient oscillations. The controllable resistive‐type fault current limiter (CRTFCL) may provide adjustable resistance, which has been applied to the soft starting of the induction motor . With the CRTFCL applied to the LVRT, the large resistance is provided at the early stage of the fault to suppress oscillations of the stator flux and current.…”

Section: Introductionmentioning

confidence: 99%

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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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R_{normalF} = \frac{π^{2}}{18} (1 - D) R_{normaldc}

where R dc is the resistance at the DC side, D is the duty ratio.…”

Section: Dual‐sequence Ffc For Rotor Current Control With Crtfcl Durimentioning

confidence: 99%

Section: Introductionmentioning

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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“…To switch out the variable impedance FCL, a ramp function has been applied. In [31], the ramp function is adopted to control the resistance of the resistive-type FCL in order to switch it out. However, the selection of the coefficient in the ramp function has not been studied, which will affect the LVRT performance.…”

Section: Introductionmentioning

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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Electromagnetic field coupled circuits and open‐loop control of fast starting processes in induction motors

Zhang,

et al. 2024

IET Power Electronics

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To solve the problems of difficulty in speed measurement and low accuracy of speed measurement of induction motor (IM) during fast starting, the electromagnetic field coupling circuit (EFCC) and open‐loop control of IM considering rapid speed change are proposed. First, the EFCC of IM is established through the stator circuit, air gap magnetic field circuit and rotor circuit, and the stator voltage and electromagnetic torque of the fast starting process are deduced from the air gap magnetic density on the basis of constant slip angular velocity, and then the open‐loop control method based on the EFCC is given. Finally, compared with the open‐loop control based on the TEC, the results of simulation and experiment show that the open‐loop control based on the EFCC can follow the acceleration starting more quickly and the starting current is smaller, which is conducive to reducing the cost of the drive.

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Soft and fast starting induction motors using controllable resistive type fault current limiter

Cited by 6 publications

References 15 publications

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

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

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

Electromagnetic field coupled circuits and open‐loop control of fast starting processes in induction motors

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