Virtual synchronous control strategy for doubly-fed induction generator under asymmetrical grid faults

Cheng, Xiawei; Sun, Xudong; Chai, Jianyun; Zhao, Yangyang

doi:10.1109/icems.2017.8056009

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…Therefore, the mechanical power and electric power are instantly unbalanced, the rotor speed might be varied, the dc-link voltage of B2B might be unstable, and the grid-side of the B2B converter might be shutdown. Therefore, several strategies have been considered: (1) Emergency rotor control [24] is adopted for the BDFIG to reduce the active power command value (i.e., to reduce the mechanical torque of the wind turbine); (2) according to [18], some extra short-term energy storage units are added to the dc-link of the B2B converter; and (3) the grid-side of the B2B converter inherits with a current limitation function, so as to limit the maximal current when the grid voltage is faulty. With these implementations, the BDFIG system can continue working during a grid fault, and will finally reach new power balancing.…”

Section: Bdfig System Configurationmentioning

confidence: 99%

Virtual Synchronous Control Based on Control Winding Orientation for Brushless Doubly Fed Induction Generator (BDFIG) Wind Turbines Under Symmetrical Grid Faults

et al. 2019

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The Brushless Doubly Fed Induction Generator (BDFIG) has huge potential for wind power systems due to its high reliability and low maintenance cost. To add inertia for system stability enhancement, as well as to maintain the uninterrupted operation during symmetrical grid faults, this study proposes a Virtual Synchronous Control (VSC) with a transient current compensation strategy for BDFIG. The proposed VSC is realized by regulating the virtual inner electrical potential and angular velocity of BDFIG under Control Winding (CW) current oriented vector control, and compensating for the transient CW current to weaken the transient inner electrical potential under symmetrical grid faults. Modeling and analysis of such a VSC strategy are presented in this paper, and a simulation is also made to compare the performances of existing and proposed VSC strategies. It is shown that the merits of the proposed VSC can enhance the fault ride through the ability of the BDFIG system and support the recovery of grid voltage.

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Section: Bdfig System Configurationmentioning

confidence: 99%

Virtual Synchronous Control Based on Control Winding Orientation for Brushless Doubly Fed Induction Generator (BDFIG) Wind Turbines Under Symmetrical Grid Faults

et al. 2019

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“…By improving the control strategy, the generation of reactive power in the system by transient voltage control during a voltage drop and the voltage recovery after a fault ensure that the terminal voltage (or grid-connected point voltage) of a generator can be restored and maintained at the prefault value after a fault [21] - [23]. At the same time, several researchers studied the FRT of self-synchronous wind turbines [24] - [26]. However, these studies are conducted in the context of a single control technology, which is not suitable for improving the transient stability of self-synchronous wind turbines.…”

Section: Introductionmentioning

confidence: 99%

Dual-mode Switching Fault Ride-through Control Strategy for Self-synchronous Wind Turbines

Tian

Chi²,

Cheng³

et al. 2023

Journal of Modern Power Systems and Clean Energy

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The installed capacity of renewable energy generation has continued to grow rapidly in recent years along with the global energy transition towards a 100% renewable-based power system. At the same time, the grid-connected large-scale renewable energy brings significant challenges to the safe and stable operation of the power system due to the loss of synchronous machines. Therefore, self-synchronous wind turbines have attracted wide attention from both academia and industry. However, the understanding of the physical operation mechanisms of self-synchronous wind turbines is not clear. In particular, the transient characteristics and dynamic processes of wind turbines are fuzzy in the presence of grid disturbances. Furthermore, it is difficult to design an adaptive fault ride-through (FRT) control strategy. Thus, a dual-mode switching FRT control strategy for self-synchronous wind turbines is developed. Two FRT control strategies are used. In one strategy, the amplitude and phase of the internal potential are directly calculated according to the voltage drop when a minor grid fault occurs. The other dual-mode switching control strategy in the presence of a deep grid fault includes three parts: vector control during the grid fault, fault recovery vector control, and self-synchronous control. The proposed control strategy can significantly mitigate transient overvoltage, overcurrent, and multifrequency oscillation, thereby resulting in enhanced transient stability. Finally, simulation results are provided to validate the proposed control strategy.

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A novel virtual synchronous generator control scheme of DFIG-based wind turbine generators based on the rotor current-induced electromotive force

Gao,

Wang,

Ding

et al. 2024

International Journal of Electrical Power & Energy Systems

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Virtual synchronous control strategy for doubly-fed induction generator under asymmetrical grid faults

Cited by 6 publications

References 6 publications

Virtual Synchronous Control Based on Control Winding Orientation for Brushless Doubly Fed Induction Generator (BDFIG) Wind Turbines Under Symmetrical Grid Faults

Virtual Synchronous Control Based on Control Winding Orientation for Brushless Doubly Fed Induction Generator (BDFIG) Wind Turbines Under Symmetrical Grid Faults

Dual-mode Switching Fault Ride-through Control Strategy for Self-synchronous Wind Turbines

A novel virtual synchronous generator control scheme of DFIG-based wind turbine generators based on the rotor current-induced electromotive force

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