An Effective Reference Generation Scheme for DFIG With Unbalanced Grid Voltage

Rani, M. A. Asha; Nagamani, C.; Ilango, G. Saravana; Karthikeyan, A.

doi:10.1109/tste.2014.2322672

Cited by 42 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The other important control aspect in the presence of system unbalance is to manage the zero sequence current . The control of zero sequence current component can be avoided by following floating/ungrounded star arrangement so that the same component is reflected in line currents . The problem of zero sequence currents can be alleviated by employing zigzag transformer as reported by Kumar et al The extent of load unbalance can be handled through load forecast compensation or virtual resistor–based compensation .…”

Section: Introductionmentioning

confidence: 99%

Angle measurement–based compensation methodology to mitigate voltage unbalance in a distribution system

Kallamadi

Chhabhaya

Shah

2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary The objective of this article is to compensate the deviations in magnitude and phase shift of load terminal voltage in an unbalanced low‐voltage distribution system. In specific, power balancing at the load terminal is accomplished through a compensator. A separate single‐phase full bridge voltage source converter (VSC) is employed in each phase to mitigate the system unbalance. The desired active and reactive power exchange of VSC with the system is accomplished with a simplified control methodology that considers terminal magnitude and angle measurements. The performance of the proposed method is compared with well established d‐q–based control methodology. The functionality of the compensator and its applicability is verified through a detailed case study.

show abstract

Section: Introductionmentioning

confidence: 99%

Angle measurement–based compensation methodology to mitigate voltage unbalance in a distribution system

Kallamadi

Chhabhaya

Shah

2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Stator flux oriented vector control schemes targeting simultaneous reduction of oscillations in active power, torque and dc‐link voltage without using dual vector control are proposed [21, 22]. The compensating reference currents for rotor side control are derived [22] to nullify the pulsations in power. The double frequency content in active and reactive powers, dc‐link voltage and torque are notably reduced along with a considerable reduction in grid and stator current THD [22] compared to most of the schemes reported so far without using any additional converter.…”

Section: Introductionmentioning

confidence: 99%

“…The compensating reference currents for rotor side control are derived [22] to nullify the pulsations in power. The double frequency content in active and reactive powers, dc‐link voltage and torque are notably reduced along with a considerable reduction in grid and stator current THD [22] compared to most of the schemes reported so far without using any additional converter. However, due to the presence of natural flux in the air gap the stator currents are not fully balanced and hence power pulsations still persist.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Natural flux minimisation technique for enhanced operation of doubly‐fed induction generator

Rani

Nagamani

Ilango

2016

IET Electric Power Applications

View full text Add to dashboard Cite

This paper presents a robust reference current generation technique for rotor side converter (RSC) control of a grid connected doubly-fed induction generator (DFIG) to eliminate the natural flux revolving in air gap implemented in the positive d-q reference frame. The objective of the scheme is to enhance the performance of the generator under grid unbalance by eliminating the double frequency content in the d-q axes stator flux without using double vector control. RSC is employed to minimise the oscillations in stator flux and consequently in power and torque while grid side converter minimises the dc-link voltage ripples and maintains zero grid reactive power. It is revealed that, minimising the stator flux pulsations as a single control target enables minimisation of unbalance in stator and grid currents and pulsations in torque, power and dc-link voltage. Further, the simplicity in implementation and computation of reference currents and rotor flux, and robustness under parameter variations render the scheme attractive. The performance of DFIG is investigated through numerical simulations in PSCAD/EMTDC for a 250 kW DFIG system and further, through experimental results for a 2.3 kW DFIG test setup. The results show the enhanced performance of DFIG with the proposed scheme.

show abstract

“…A phase-locked loop (PLL) 1,2 is used to trace the phase of the grid. A voltage-oriented vector control is applied to the GSC, which is suitable for use in both DFIG 3 and PMSG 4,5 systems.…”

Section: Introductionmentioning

confidence: 99%

New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

Yang

Lin

2015

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

This paper concerns the application of the predictive direct torque control (PDTC) method to a permanent magnet synchronous generator (PMSG). In classical methods for controlling a PMSG, the sampling frequency of the controller must be precisely determined. However, the use of PDTC in this study enables three optimal duty cycles to be predicted at the moment of sampling, significantly reducing the ripple of the electromagnetic torque and the amplitude of the stator flux below those caused by conventional control methods. Therefore, the new method allows a lower sampling frequency than the traditional method. To operate the machine side converter, the DC bus capacitor voltage must be maintained within an acceptable and stable range. Voltage-oriented vector control is used to control the active power and the reactive power, which are delivered from the DC bus capacitor, as well as to control the voltage. In this study, a complete wind turbine system is considered, including a focus on the aerodynamics and structure of each wind turbine, using Fatigue, Aerodynamics, Structures and Turbulence (FAST). Also, to prevent the rotor speed of the wind turbine from exceeding the rated rotor speed too much, a very simple pitch controller system is considered. V C 2015 AIP Publishing LLC. [http://dx.

show abstract

An Effective Reference Generation Scheme for DFIG With Unbalanced Grid Voltage

Cited by 42 publications

References 15 publications

Angle measurement–based compensation methodology to mitigate voltage unbalance in a distribution system

Angle measurement–based compensation methodology to mitigate voltage unbalance in a distribution system

Natural flux minimisation technique for enhanced operation of doubly‐fed induction generator

New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

Contact Info

Product

Resources

About