A flexible power control strategy for rotor-side converter of DFIG under unbalanced grid voltage sags

Zhou, Niancheng; Sun, Fangqing; Wang, Qianggang; Meng, Xiaoxiao

doi:10.1016/j.ijepes.2016.11.016

Cited by 15 publications

(3 citation statements)

References 25 publications

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“…Define new coordinates x 11 = y 1 , x 21 = y 2 to represent the system states, and define extended states x 12 = 1 , x 22 = 2 to denote the perturbation terms. Substituting equations (19), (20) into (17), (18), the subsystems 1 and 2 can be expressed in two coupled subsystems as 1 :…”

Section: Observer-based Robust Control Of Rsc a Input-output LImentioning

confidence: 99%

“…Fig. 5 depicts the hardware-in-the-loop experimental setup developed using real-time digital simulator (RTDS) and digital signal processing and control engineering (dSPACE), which is considered by many research laboratories [19], [20] to test the novel control scheme for DFIG system. The grid-connected DFIG system shown in Fig.…”

Section: Experiments Studies a System Configurationmentioning

confidence: 99%

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Control of DFIG’s Rotor-Side Converter With Decoupling of Current Loops Using Observer-Based Fractional-Order Sliding-Mode Regulators

et al. 2019

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This paper presents an observer-based robust control (ORC) scheme, combining perturbation observers with fractional-order sliding-mode regulators, for the current control of rotor-side converter (RSC) of a doubly-fed induction generator (DFIG). Perturbation states are defined to describe the interactions between d-axis and q-axis rotor current loops. The decoupled current control of RSC is realized via fractionalorder sliding-mode output feedback control and perturbation compensation based on the estimation states obtained by perturbation observers. The proposed ORC scheme does not require any parameters of DFIG and it is robust to system uncertainties and external disturbances. Experimental tests are undertaken on a hardware-in-the-loop DFIG system to verify the control performance of ORC scheme.

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Section: Observer-based Robust Control Of Rsc a Input-output LImentioning

confidence: 99%

Section: Experiments Studies a System Configurationmentioning

confidence: 99%

Control of DFIG’s Rotor-Side Converter With Decoupling of Current Loops Using Observer-Based Fractional-Order Sliding-Mode Regulators

et al. 2019

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“…A new strategy is introduced LVRT for DFIG in low voltage in the network. The objective of this LVRT strategy is to maintain the wind turbine connected to the grid [9][10][11][12][13] to ensure the operational safety of the wind farm and the high quality of the energy injected into the grid in the case of a voltage sag [14,15] This strategy is divided into two categories: active methods by improving the control strategy [16][17][18][19] and passive methods by adding physical protection [20,21].…”

Section: Introductionmentioning

confidence: 99%

DFIG use with combined strategy in case of failure of wind farm

Loulijat¹,

Ababssi²,

Makhad³

2020

IJECE

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In the wind power area, Doubly Fed Induction Generator (DFIG) has many advantages due to its ability to provide power to voltage and constant frequency during rotor speed changes, which provides better wind capture as compared to fixed speed wind turbines (WTs). The high sensitivity of the DFIG towards electrical faults brings up many challenges in terms of compliance with requirements imposed by the operators of electrical networks. Indeed, in case of a fault in the network, wind power stations are switched off automatically to avoid damage in wind turbines, but now the network connection requirements impose stricter regulations on wind farms in particular in terms of Low Voltage Ride through (LVRT), and network support capabilities. In order to comply with these codes, it is crucial for wind turbines to redesign advanced control, for which wind turbines must, when detecting an abnormal voltage, stay connected to provide reactive power ensuring a safe and reliable operation of the network during and after the fault. The objective of this work is to offer solutions that enable wind turbines remain connected generators, after such a significant voltage drop. We managed to make an improvement of classical control, whose effectiveness has been verified for low voltage dips. For voltage descents, we proposed protection devices as the Stator Damping Resistance (SDR) and the CROWBAR. Finally, we developed a strategy of combining the solutions, and depending on the depth of the sag, the choice of the optimal solution is performed.

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A comprehensive survey on control strategies of distributed generation power systems under normal and abnormal conditions

Meral

Çelík

2019

Annual Reviews in Control

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A flexible power control strategy for rotor-side converter of DFIG under unbalanced grid voltage sags

Cited by 15 publications

References 25 publications

Control of DFIG’s Rotor-Side Converter With Decoupling of Current Loops Using Observer-Based Fractional-Order Sliding-Mode Regulators

Control of DFIG’s Rotor-Side Converter With Decoupling of Current Loops Using Observer-Based Fractional-Order Sliding-Mode Regulators

DFIG use with combined strategy in case of failure of wind farm

A comprehensive survey on control strategies of distributed generation power systems under normal and abnormal conditions

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