Control Scheme for DC Voltage Regulation of Stand-Alone DFIG-DC System

Misra, Himanshu; Gundavarapu, Akhila; Jain, Amit

doi:10.1109/tie.2016.2632066

Cited by 29 publications

(25 citation statements)

References 19 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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“…Replace the stator current in terms of the rotor and magnetizing current, and convert it into stator flux reference frame. Therefore, torque can be rewritten as (10).…”

Section: Torque Ripplementioning

confidence: 99%

“…In [8], the frequency is varied over the wide range by flux loop without exceeding the rated flux. The control of DFIG-DC for standalone or isolated DC loads is recently reported in [9][10][11][12]. But no work is reported yet for harmonics reduction in standalone DFIG-DC system.…”

Section: Introductionmentioning

confidence: 99%

Harmonics reduction in standalone DFIG-DC system by shunt active filter controlled in stator flux reference frame

Misra

Jain

2018

Sādhanā

Self Cite

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The presence of diode rectifier in standalone Doubly Fed Induction Generator-Direct Current (DFIG-DC) system leads to considerable current, voltage and torque harmonics and requires reactive power from the machine. A unique shunt active filter arrangement is proposed for addressing these requirements. The DC Link of DFIG-DC itself acts as input to shunt active filter and there is no requirement of creating and regulating a separate one. Since the stator flux reference frame is known in FOC of DFIG-DC system; the same can be used as PLL for the generation of current references for harmonics and reactive compensation in active filter control scheme. Hence, the AC voltage sensing is not needed in the proposed active filter control. In this paper, it is shown that current, voltage and torque harmonics are reduced with the help of shunt active filter, which have lower rating compared to the rotor side converter. The proposed scheme is verified by detailed experiments on a 5.5 kW slip-ring induction machine.

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“…The primary objectives of dc power generation system are to keep dcbus voltage constant under stand-alone condition or to control stable power flow under grid-connected condition. In recent years, the regulation of DFIG-DC system is considered in [10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…For the existing methods of stand-alone DFIG-DC system in [19][20][21], the dc-voltage controller is designed based on an approximate relation between the dc-voltage and stator voltage. The dynamic performance of dc-voltage regulation is influenced by disturbances easily.…”

Section: Introductionmentioning

confidence: 99%

Improved super‐twisting sliding mode control of a stand‐alone DFIG‐DC system with harmonic current suppression

Guo

Wang

Peng

et al. 2020

IET Power Electronics

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This study presents an improved super-twisting sliding mode (SSM) approach to a stand-alone doubly fed induction generator (DFIG) for direct current (DC) generation system. By taking the uncertainties into consideration, an improved SSM regulator based on an extended state observer (ESO) is proposed to enhance the robustness of DC-voltage regulation. Moreover, a novel sinusoidal rotor current calculation method is proposed to generate sinusoidal reference of rotor current. A resonant-based ESO (R-ESO) SSM approach is proposed to regulate rotor current. By applying the R-ESO to estimate the model-related part of DFIG, the tracking performance with respect to a sinusoidal reference is improved. Then, the suppression ability to fifth and seventh harmonic currents are enhanced. Finally, both simulations and experiments on a 6-kW DFIG-DC system are provided to show the effectiveness of DC-voltage regulation and harmonic current suppression of the proposed approach. Nomenclature i, u, φ current, voltage and flux R, L, T resistance, inductance, torque ω sl , ω s slip, and synchronous angular frequency C DC-bus capacitance V dc , i dc DC voltage and current i l DC-load current Superscript

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Control Scheme for DC Voltage Regulation of Stand-Alone DFIG-DC System

Cited by 29 publications

References 19 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

Harmonics reduction in standalone DFIG-DC system by shunt active filter controlled in stator flux reference frame

Improved super‐twisting sliding mode control of a stand‐alone DFIG‐DC system with harmonic current suppression

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