Maximum power point tracking of a variable speed PMSG wind power system with DC link reduction technique

Kotti, Radhakrishna; Shireen, Wajiha

doi:10.1109/pesgm.2014.6939906

Cited by 7 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So along with PPT, DC link ripples also are reduced by deriving a differential voltage against the ripple and suppressing the same. The duty cycle ratios are generally expressed as in (20): (20) (21) As the controlled quantities are both V DC , I DC and ripple factors are mainly due to converter load variations, the duty ratios should be derived with the product of current values as in (22). (22) (23) The duty ratios of the boost converter with the input voltage V R from the rectifier output and V DC as the output voltage can be rewritten as (24) and (25) …”

Section: Identity Of Composite Ppt IImentioning

confidence: 99%

See 1 more Smart Citation

Mitigation of Uncertainties in Wind-Powered Renewable Systems for Environmental Assets

Pragaspathy¹,

Anand²

2017

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Today the greatest global needs include the acquisition of more affordable, sustainable, clean, and natural sources of electricity since the extraction process when generating power using fossil fuels not only stimulates cost-dependency of domestic and imported fuels but also creates drastic pollution and contamination leading to CO 2 emissions. Among the natural resources of electricity, wind power is a commercially proven and rapidly growing power generator that provides clean and cost-effective electricity. The International Energy Agency (IEA) has determined that 18% of global power will be sponsored by wind by 2050; that figure is 2.6% today [1][2][3][4][5][6].Most wind turbines today use a variable speed drive system. As its reliability overcomes the fixed speed operating wind turbine by its extra energy capturing ("real power"), improvements in power quality, gearless mechanisms, and thereby fault rates are reduced. Also, the fixed speed wind turbine cannot operate at higher efficiencies across a range of wind speeds [7][8]. In Pol. J. Environ. Stud. Vol. 26, No. 1 (2017), 253-266 Original Research Mitigation of Uncertainties in AbstractProgress in semiconductor technology in recent decades has been continuously innovative regarding renewable application. This paper presents fluctuationless output and increased energy captured by a permanent magnet synchronous generator (PMSG) based variable speed wind turbine system (VSWTS) through a composite action of peak power tracking (PPT) controllers in a closed-loop control of turbine speed and boost converter. Though the sensorless control of tip speed ratio (TSR) is preferred at most, incorporation of the high-speed digitized wind gauge replaces the complexity in the closed-loop drive of the turbine generator. The proposed concept includes control over solid-state converters (SSC) to eliminate switched-mode harmonics and thus DC link voltage is maintained at all levels. Fluctuations on the load side can be eliminated with a pulse width modulation (PWM) inverter. The circuit simulation proclaims PMSG voltage and boost voltage for different wind velocities to ensure real power control through optimal wind turbine speed and reactive power control through stabilized output voltage. Our investigation was performed on a 0.5 kW wind turbine generator and converter module to ensure the synchronized reactive power control at both SSC stages. Comparative test results were taken pertaining to the above discussion, which validates the performance of the proposed system in its typical area of application.

show abstract

Section: Identity Of Composite Ppt IImentioning

confidence: 99%

“…Kotti et al proposed a control strategy that mitigates the double-line DC link ripples [21]. Also, they have compared various MPPT Techniques such as TSR control, PSF control, and HCS.…”

mentioning

confidence: 99%

Mitigation of Uncertainties in Wind-Powered Renewable Systems for Environmental Assets

Pragaspathy¹,

Anand²

2017

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

show abstract

“…(22) It can be found that the k ωt estimator contains, on one side, the information of real-time inductor current i dc and, on the other side, the rotor speed ω r providing the real-time speed information of the studied WECS.…”

Section: Estimator Of Mechanical Power Coefficientmentioning

confidence: 99%

“…This makes the overall coordination of the entire control system challenging. However, owing to the POR-based speed controller designed to include the information of the duty cycle and the estimator for mechanical power coefficient including the inductor current shown in (22), the studied system in this research is particularly simplified without a current loop, and it is just controlled by only one speed loop. Additionally, the corresponding convergence and stability are analysed in the next section.…”

Section: Design Of Por-based Mppt and Speed Controllersmentioning

confidence: 99%

Development of Novel Robust Regulator for Maximum Wind Energy Extraction Based upon Perturbation and Observation

Tang

Xiahou

2017

Energies

View full text Add to dashboard Cite

This paper develops a robust regulator design approach to maximum power point tracking (MPPT) of a variable-speed wind energy conversion system (WECS) under the concept of perturbation and observation. The proposed perturb and observe regulators (PORs) rooted on the sliding mode method employs the optimal power curve (OPC) to realize MPPT operations by continuously adjusting rotor speeds and the duty cycles, which can ensure control performance against system parameter variations. The proposed PORs can detect sudden wind speed changes indirectly through the mechanical power coefficient, which is used to acquire the rotor speed reference by comparing it with the optimal power constant. For the speed and duty cycle regulation, two novel controllers based on the proposed POR, i.e., an MPPT controller and a speed controller, are devised in this research. Moreover, by applying the small-signal analysis on a nonlinear wind turbine system, the convergence of the proposed speed controller is proven for the first time based on the Lyapunov theory, and meanwhile, a single-pole transfer function, to describe the effect of duty cycle variations on rotor speeds, is designed to ensure its stability. The proposed strategy is verified by simulation cases operated in MATLAB/Simulink and experimental results performed from a 0.5-kW wind turbine generator simulator.

show abstract

“…Owing to its high reliability, this Toolbox has been used instead of actual experiments to study wind turbine modelling, and some related studies about PMSG [28][29][30] have been investigated. Fig.…”

Section: Pmsg System Modeled Using Simpowersystemsmentioning

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

Maximum power point tracking of a variable speed PMSG wind power system with DC link reduction technique

Cited by 7 publications

References 11 publications

Mitigation of Uncertainties in Wind-Powered Renewable Systems for Environmental Assets

Mitigation of Uncertainties in Wind-Powered Renewable Systems for Environmental Assets

Development of Novel Robust Regulator for Maximum Wind Energy Extraction Based upon Perturbation and Observation

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

Contact Info

Product

Resources

About