Enhanced Control of DFIG Based Wind Energy Conversion System Under Unbalanced Grid Voltages Using Mixed Generalized Integrator

Das, Souvik; Singh, Bhim

doi:10.1109/jestie.2022.3143821

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…The control structure of dual synchronous reference frames (SRFs) is normally used to control the PS and NS components [21], [22]. In order to obtain accurate PS and NS synchronization angles, [16] and [17] employ the dual-sequence PLL structure, as shown in Fig.…”

Section: A Small-signal Model Of Dual-sequence Pllsmentioning

confidence: 99%

A Novel PLL Structure for Dynamic Stability Improvement of DFIG-based Wind Energy Generation Systems During Asymmetric LVRT

Guan¹,

Ye²

2023

Journal of Modern Power Systems and Clean Energy

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The dynamic coupling effect, which is introduced by the dual-sequence phase-locked loops (PLLs) used in doublyfed induction generator (DFIG) based wind energy generation systems (WEGSs) during asymmetric low voltage ride-through (LVRT) in weak grid, needs attention. In order to study this new dynamic coupling effect, an equivalent two-degree-of-freedom (2-DOF) spring damper particle model is used in this paper to develop a small-signal model for the dual-sequence PLLs. The dynamic interaction between the positive-sequence (PS) and negative-sequence (NS) PLLs is unveiled. Moreover, the impact of the dynamic coupling between the dual-sequence PLLs on the dynamic stability during the steady-state stage of an asymmetric fault is analyzed. The analysis results show that the dynamic coupling between the dual-sequence PLLs will cause drift in the frequency and damping for the PS and NS PLL modes. This will change the instability modal of the system and introduce the risk of dynamic instability. Hence, the effectiveness of existing control strategies for enhancing the dynamic stability will be decreased. Finally, a novel PLL structure is designed to improve the dynamic stability of the system during the steady-state stage of an asymmetric fault. The effectiveness of the proposed strategy is verified by simulations and experiments.

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Section: A Small-signal Model Of Dual-sequence Pllsmentioning

confidence: 99%

A Novel PLL Structure for Dynamic Stability Improvement of DFIG-based Wind Energy Generation Systems During Asymmetric LVRT

Guan¹,

Ye²

2023

Journal of Modern Power Systems and Clean Energy

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“…By using modern power electronic converters, the machine will run at adjustable speeds. So, these variable speed wind turbines will improve the wind energy production [1] [3].…”

Section: Introductionmentioning

confidence: 99%

Doubly Fed Induction Generatorfor Wind Energy Conversionsystems With Unbalanced Grid Conditions

2023

IRJMETS

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The proposed controller is used to track the desired direct current (DC) voltage reference at the output of the DC link, to maintain constant the grid power factor at the step-up transformer terminals controlled by the grid side converter, and to force independently the stator active and reactive power to track desired values through the rotor currents controlled by the rotor side converter. This project deals with the operation of Doubly Fed Induction Generator (DFIG) with an integrated active filter capabilities using Grid Side Converter (GSC). The main contribution of this work lies in the control of GSC for supplying harmonics in addition to its slip power transfer. The Rotor Side Converter (RSC) is used for attaining maximum power extraction and to supply required reactive power to DFIG. This control scheme is experimentally validated on a DFIG prototype and tested for variable wind speed to track a time-varying power reference and to extract the maximum power from the wind, under both balanced and unbalanced grid conditions.

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“…In reference [9], the influence of the negative sequence current of the electric railway on the wind farm is analyzed theoretically, and an unbalance voltage compensation strategy considering doubly-fed induction generator (DFIG) is proposed. In references [10,11,12], the control strategy based on resonant feedback regulator is used in the rotor and grid sides of DFIG to compensate for the voltage imbalance at the public PCC, under unbalanced network, various strategies are applied to improve operation performance of DFIG, such as extended state observer (ESO) based robust predictive rotor current control [13], mixed generalized integrator (MGI) [14], improve deduced order generalized integrator (IROGI) [15]. In reference [16], sliding mode control is used to improve the operation performance of DFIG working with voltage unbalance and sag.…”

Section: Introductionmentioning

confidence: 99%

Research on integrated control strategy of doubly‐fed induction generator‐based wind farms on traction power supply system

Liao

Mastoi

Wang

et al. 2022

IET Power Electronics

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With the large-scale construction of high-speed railway and wind farms, the traction power supply system (TPSS) and wind farms are connected through the power system. The threephase unbalance of grid voltage caused by the TPSS will seriously affect traditional wind farms' operation control. Considering the TPSS and wind farms are connected to the power system's public point of common coupling (PCC), the wind farm's current control and voltage support strategy are studied. Firstly, aiming to suppress the influence of harmonics and the unbalanced power grid caused by the TPSS, the repetitive controller (RC) is introduced to the current control of the doubly-fed induction generator (DFIG). The vector control strategy based on the combination of proportion integral (PI) and RC is adopted, where the PI controller is used to adjust the average value of DFIG output power and the RC regulator controls DFIG output sinusoidal stator current. Secondly, the wind farm's voltage support strategy is designed to reduce the voltage fluctuation caused by the TPSS's loads. By coordinating three measures of putting in reactive power compensation devices, DFIG working in voltage control mode, and limiting DFIG output active power, the voltage of wind farm and traction station is effectively supported. Finally, a simulation model with the TPSS and wind farm is built to verify the proposed control strategy's effectiveness.

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Enhanced Control of DFIG Based Wind Energy Conversion System Under Unbalanced Grid Voltages Using Mixed Generalized Integrator

Cited by 16 publications

References 23 publications

A Novel PLL Structure for Dynamic Stability Improvement of DFIG-based Wind Energy Generation Systems During Asymmetric LVRT

A Novel PLL Structure for Dynamic Stability Improvement of DFIG-based Wind Energy Generation Systems During Asymmetric LVRT

Doubly Fed Induction Generatorfor Wind Energy Conversionsystems With Unbalanced Grid Conditions

Research on integrated control strategy of doubly‐fed induction generator‐based wind farms on traction power supply system

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