Reactive power sharing improvement of droop‐controlled DFIG wind turbines in a microgrid

Marhaba, Mohammad Saleh; Farhangi, Shahrokh; Iman‐Eini, Hossein; Iravani, Reza

doi:10.1049/iet-gtd.2016.2086

Cited by 24 publications

(21 citation statements)

References 32 publications

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“…Now the full detailed simulation data are presented for the vector control for the WECS based on DFIG with 5-level SPWM diode clamped converter. The vector control is divided into GSC and RSC control [22][23]. In the presented system showing THD and performance in output voltage and current for the two, three, four and five level types of SPWM converters compared at different operating points in the system as shown in Table 2 and pointed in Fig.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Comparative Study on Performance Improvement of SPWM/THIPWM based DCMLI Grid Connected DFIG

Hossam-Eldin

Negm

Elgamal³

et al. 2020

E3S Web Conf.

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Multi-level voltage source converter is integrated in various fields in renewable energy power generation technologies such as wind and solar sources for applications that need higher voltage and higher power. In wind power generation market, doubly fed induction generator (DFIG) based on wind power generation is now the leading technology as they are economically feasible, they do offer a variable speed and efficient substitute to the fossil fuel. This paper proposes a DFIG based on a back to back diode clamped multilevel converter systems (DCMLI) fired comparatively by sinusoidal pulse width modulation (SPWM) and third harmonic injection pulse width modulation (THIPWM) techniques. By using these technologies, the DFIG performance is compared for different wind speeds under normal operation condition. The proposed approach shows that the DCMLI systems generate a near sinusoidal voltage with lower values in total harmonic distortion (THD) thus, upgrading the power quality that is produced by DFIG. Lastly, the variation of frequency of induced rotor voltage and the active power flow due to the wind speed changes when the rotor speed changes from super synchronous to sub synchronous speeds is investigated.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Comparative Study on Performance Improvement of SPWM/THIPWM based DCMLI Grid Connected DFIG

Hossam-Eldin

Negm

Elgamal³

et al. 2020

E3S Web Conf.

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show abstract

“…In addition, an integrated controller for wind turbines with both inertial response and primary frequency regulation is proposed in [15], which provides complete dynamic frequency support for the grid with high wind power penetration and enables a fast-virtual inertial response under load reduction conditions. Moreover, inspired by the droop and inertia characteristics of traditional power plants, some researchers add the droop control into the GSC of DFIG [16], [17]. By tracking the voltage amplitude and frequency reference signals, the DFIG regulates the output voltage and frequency of droop control, and reasonably distributes the active and reactive power.…”

Section: Introductionmentioning

confidence: 99%

“…From the analysis mentioned above, it is easy to find out that so far scholars have put forward a large number of control strategies to improve the frequency regulation ability of DFIG, including not only the controller designed based on DFIG linearization model, such as droop [16], ISYNC [3], VSG [4], etc., but also the nonlinear robust adaptive controller designed based on DFIG nonlinear model. Nevertheless, the above control strategies still have their own disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Adaptive Robust Control Strategy of Doubly Fed Induction Generator Based on Virtual Synchronous Generator

2020

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Doubly fed induction generator (DFIG) may suffer from huge disturbance owing to the uncertainty of generator parameters and load fluctuation during operation process. Hence, in the context of virtual synchronous generator (VSG) technology and its power-frequency control characteristics, this paper presents a VSG-based nonlinear adaptive robust controller (NARC), aiming to enhance the comprehensive regulation performance of DFIG. Firstly, a nonlinear robust adaptive controller with disturbance rejection and uncertainty adaptive learning ability is designed by establishing an improved dynamic model of the rotor motion equation in VSG, so as to achieve the optimal regulation of DFIG with robustness and adaptability. Secondly, in order to realize the fast dynamic response and autonomous synchronization ability in DFIG, a modified control strategy of the grid side converter (GSC) in DFIG is constructed by voltage and current dual-loop control (DLC) and VSG, which not only retains the significant dynamic response ability of the current inner-loop in DLC, but also improves the inertia and damping of the system. Finally, simulation results indicate that the modified control strategy exhibits satisfied dynamic performance and reliability, and reveals the robustness and adaptability of the control strategy in response to external random interferences and internal uncertain parameters. INDEX TERMS Doubly fed induction generator, virtual synchronous generator, nonlinear adaptive robust control, voltage and current dual-loop control.

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“…21 DFIG can be controlled to improve the power sharing in micro-grid with other types of generators which are unable to support the grid during faults. 22,23 In Reference 24, a saturated core fault current limiter is used in DFIG system to enhance the fault ride-through capability. In Reference 25, a novel structure of modified switch type fault current limiter is presented that protects the DFIG wind turbine during the symmetrical and asymmetrical grid faults.…”

Section: Introductionmentioning

confidence: 99%

Event analysis and real‐time validation of doubly fed induction generator‐based wind energy system with grid reactive power exchange under sub‐synchronous and super‐synchronous modes

Thomas

Asok

2020

Engineering Reports

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The insertion of renewable power generators into the power system network has been promoted by the environment protection aspects. Doubly fed induction generator (DFIG)-based wind energy system is one of the most viable technologies for sustained power generation. This paper focuses on the operational analysis of DFIG-based wind energy conversion systems (WECS) with real-time experimental validation. An event analysis is executed under sub-synchronous and super-synchronous speeds with the variation in wind velocity and reactive power exchange by controlling the rotor side converter and grid side converter under MATLAB/Simulink platform. The results of the analysis with reactive power exchange can be utilized for the enhanced control of power electronic converters of DFIG-based WECS for better support to the grid. The validation of results is accomplished by emulation of 2 MW DFIG-based three blade wind turbine system in the laboratory under a real-time hardware-in-the-loop platform. K E Y W O R D S doubly fed induction generator, hardware-in-the-loop, renewable energy sources, renewable power generators, wind energy conversion systems This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Reactive power sharing improvement of droop‐controlled DFIG wind turbines in a microgrid

Cited by 24 publications

References 32 publications

Comparative Study on Performance Improvement of SPWM/THIPWM based DCMLI Grid Connected DFIG

Comparative Study on Performance Improvement of SPWM/THIPWM based DCMLI Grid Connected DFIG

Nonlinear Adaptive Robust Control Strategy of Doubly Fed Induction Generator Based on Virtual Synchronous Generator

Event analysis and real‐time validation of doubly fed induction generator‐based wind energy system with grid reactive power exchange under sub‐synchronous and super‐synchronous modes

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