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MFC BASED DOUBLY FED INDUCTION GENERATOR IN WIND ENERGY CONVERSION SYSTEM DONE BY GUIDED BY S.NAGARAJAN (950313411010) S.THANGARAJ ME-POWER SYSTEM ENGINEERING ASST.PROFESSOR, DEPARTMENT OF EEE [email protected] PROJECT WORK (PHASE -II) 8807501375

Mfc based doubled fed induction generator in wind energy conversion system

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Page 1: Mfc based doubled fed induction generator in wind energy conversion system

MFC BASED DOUBLY FED INDUCTION

GENERATOR IN WIND ENERGY CONVERSION SYSTEM

DONE BY GUIDED BY

S.NAGARAJAN (950313411010) S.THANGARAJME-POWER SYSTEM ENGINEERING ASST.PROFESSOR, DEPARTMENT OF EEE

[email protected]

PROJECT WORK (PHASE -II)

8807501375

Page 2: Mfc based doubled fed induction generator in wind energy conversion system

OUTLINE:Abstract IntroductionExisting systemProposed systemLiterature reviewSimulationOutput resultConclusionFuture scopeReference

Page 3: Mfc based doubled fed induction generator in wind energy conversion system

Abstract:

Wind energy generator.MFC controller .Avoid an external reactive power

compensator.Extracting maximum of power .

Page 4: Mfc based doubled fed induction generator in wind energy conversion system

Objective:

Extract maximum power using Magnitude and frequency control(MFC) and control reactive power flow.

Page 5: Mfc based doubled fed induction generator in wind energy conversion system

Introduction:

Key role of renewable energy.Wind energy power extraction .Induction generator used in wind

energy system.Wind energy generation method

Fixed speedVariable speed

Page 6: Mfc based doubled fed induction generator in wind energy conversion system

Condt…..Fixed speed system - small scale

application.Variable speed system - large

scale application.Drive train system.Feature of DFIG system.

Page 7: Mfc based doubled fed induction generator in wind energy conversion system

Existing system:

Dynamic slip control technique Variable resistor employed. FACTS controller needed. Suitable only limited variation of wind

speed. Drawback -external reactive power

compensator

Field oriented control technique Stator winding directly connected to grid. Field winding are controlled. Complexity to control field winding.

Page 8: Mfc based doubled fed induction generator in wind energy conversion system

Proposed system:

Magnitude and frequency control technique

Rotor side to be controlled. Two feedback loop. Reactive power compensation.

Advantages: maintain constant voltage and frequency. Reduce the complexity of controller. Improve the reliablity.

All Simulink -MATLAB environment .

Page 9: Mfc based doubled fed induction generator in wind energy conversion system

Literature review:

Y. Lei, A. Mullane, and G. Lightbody, “Modeling of the wind turbine with a doubly fed induction generator for grid integration studies,” IEEE Trans. Energy Convers., vol. 21, no. 1, pp. 257–264, Mar. 2006.

This paper highlights the induction generator efficiency as a basic factor.

The loading parameters have to be controlled . Blade pitch control, control and protective

schemes considered.steady state performance of the induction

generator is investigated.Disadvantages:

1.Power quality issues. 2.problem in reactive power control.

Page 10: Mfc based doubled fed induction generator in wind energy conversion system

Cont….

• L. Xu and P. Cartwright, “Direct active and reactive power control of DFIG for wind energy generation,” IEEE Trans. Energy Convers., vol. 21, no. 3, pp. 750–758, Sep. 2006

This paper presents direct active and reactive power control.

Done by selecting appropriate voltage vectors on the rotor side.

It found that the initial rotor flux has no impact on the changes of the stator active and reactive power.

Disadvantages: 1).accurate power ratting of machine

needed. 2).suitable only grid integrated system.

Page 11: Mfc based doubled fed induction generator in wind energy conversion system

Cont…

M. Orabi, T. Ahmed, and M. Nakaoka, “Efficient performances of induction generator for wind energy utilization,” in Proc. 30th Annu. Conf.IEEE Ind. Elect. Soc., Nov. 2004, pp. 838–843

This paper develops a simple DFIG wind turbine model in which the power converter is simulated as a controlled voltage source, regulating the rotor current to meet the command of real and reactive power production.

This model has the form of traditional generator model and hence is easy to integrate into the power system simulation tool .

Disadvantages: 1).Machine ratting is high. 2).converter cost high. 3).Facts controller needed.

Page 12: Mfc based doubled fed induction generator in wind energy conversion system

Cont…

N. W. Miller, W. W. Price, and J. J. Sanchez-Gasca, “Comparative simulation of Dynamic modeling of DFIG based wind turbine-generators,” GE Power Systems Energy Consulting, Gen. Elect. Int., Inc., Schenectady, NY, USA, Oct. 2003.

This paper mainly focused on 1).wind turbine system. 2).pitch angle control. 3).Drive train model. Disadvantages: 1).issues in grid integration. 2).Does not meet out real time

requirments.

Page 13: Mfc based doubled fed induction generator in wind energy conversion system

Power extracted from wind:Pwind = 1/2 * ρ * A * V 3

ρ =Density of airA =swept area of bladeV =velocity of windPwind = power extracted from wind

P=0.5*0.4*2.1519*10*10*10*1.24 P=533w

Page 14: Mfc based doubled fed induction generator in wind energy conversion system

DFIG:

Page 15: Mfc based doubled fed induction generator in wind energy conversion system

MFC controller diagram:

Page 16: Mfc based doubled fed induction generator in wind energy conversion system

BLOCK PARAMETER:

PARAMETER VALUE

Nominal wind speed 10 m/s

No of wind blade 1

Power factor 0.9

Grid voltage 120 kv

Grid frequency 60 Hz

Rotor resistance 0.171 p.u

Dc link capacitance 1 mf

System inertia 5 sec

Rotor resistance 0.171 pu

Page 17: Mfc based doubled fed induction generator in wind energy conversion system

simulation for mfc control system:

Page 18: Mfc based doubled fed induction generator in wind energy conversion system

Simulation for Wind turbine model:

Page 19: Mfc based doubled fed induction generator in wind energy conversion system

Simulation for pulse generation circuit:

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Stator output voltage:

Page 21: Mfc based doubled fed induction generator in wind energy conversion system

Stator output current:

Page 22: Mfc based doubled fed induction generator in wind energy conversion system

Real and reactive power flow:

Page 23: Mfc based doubled fed induction generator in wind energy conversion system

Output Torque:

Page 24: Mfc based doubled fed induction generator in wind energy conversion system

DC LINK VOLTAGE:

Page 25: Mfc based doubled fed induction generator in wind energy conversion system

Rotor speed output:

Page 26: Mfc based doubled fed induction generator in wind energy conversion system

Result:Stator RMS output voltage 0.868 p.u

Maximum extracted power(practical)Maximum extracted power(theoritical)

0.776 p.u0.533 p.u

Maximum attained rotor speed 0.85 p.u

Dc link voltage 0.78p.u

THD 0.28 p.u

Page 27: Mfc based doubled fed induction generator in wind energy conversion system

Conclusion:

Control technique of DFIG have been analysed.

Maximum rotor speed is attained.Maximum stator voltage is

obtained.

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Future scope:

Matrix converters may consider.Direct torque control and direct

power control.Wind speed sensorless control

strategie.

Page 29: Mfc based doubled fed induction generator in wind energy conversion system

Reference:

M. Orabi, T. Ahmed, and M. Nakaoka, “Efficient performances of induction generator for wind energy utilization,” in Proc. 30th Annu. Conf.

IEEE Ind. Elect. Soc., Nov. 2004, pp. 838–843 L. Xu and P. Cartwright, “Direct active and

reactive power control of DFIG for wind energy generation,” IEEE Trans. Energy Convers., vol. 21, no. 3, pp. 750–758, Sep. 2006

Y. Lei, A. Mullane, and G. Lightbody, “Modeling of the wind turbine with a doubly fed induction generator for grid integration studies,” IEEE Trans. Energy Convers., vol. 21, no. 1, pp. 257–264, Mar. 2006.

Page 30: Mfc based doubled fed induction generator in wind energy conversion system

CONT…

Yu Zou, Malik E. Elbuluk, “ Simulation Comparisons and Implementation of Induction Generator Wind Power Systems”, IEEE transactions on industry applications, vol. 49, NO. 3, MAY/JUNE 2013.

S. Heier, “ Grid Integration of Wind Energy Conversion Systems. Hoboken”, NJ, USA: Wiley, 2006.

H. Sun, Y. Ren, and H. Li, “DFIG wind power generation based on backto- back PWM converter,” in Proc. IEEE Int. Conf. Mechatron. Autom., Aug. 2009, pp. 2276–2280.

M. Stiebler “ Wind Energy Systems for Electric Power Generation ” Berlin, Germany: Springer-Verlag, 2008.

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