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CONTENTS… Introduction
Wind energy conversion system
Types of wind energy systems
Paper 1
Paper 2
References
Conclusion
INTRODUCTION To improve the utilization of wind energy effectively by using
power electronic converters.
Keypoints for wind energy systems are
1. Available wind energy
2. Type of wind turbine employed
3. Type of electric generator and power
4. Electronic circuitry employed
5. Interfacing with the grid
WIND ENERGY CONVERSION SYSTEM
ElectricalGenerator
Wind turbine
Power electronic interface
Gird
variable speed voltage , frequency,
operation for optimal active and reactive power
power excitation control
TYPES OF WIND ENERGY SYSTEM
WEC BASED ON GENERATOR
GRID INTEGRATION KEY POINTS
Fixed speed system
Induction generator
Direct Constant speed,Low control
ability
Partially variablespeed system
DFIG AC-DC –AC voltage sourceconverter
Highly controllable,Vector control of Active & reactive power
Fully variable System
Inductiongenerator
or sychroniousgenerator
AC-DC –AC voltage sourceconverter
or Z source
converter
Highly controllable, wide range of speed,For Z sourceShort circuit protection improved
PAPER 1 : F. Blaabjerg, Z. Chen, R. Teodorescu, F. Iov ” Powerelectronics in wind turbine system”, IPEMC 2006
Fig : control of wind turbine with DFIG system
PAPER 2 : yogesh n. murthy, “a review on power electronics applications on wind turbines”, IJRET , vol 2 , nov 2013
Maximum power point tracking algorithm
Maximum wind power control
• Generated power (P) = ½*ρ*π*(R^2)*(V^3)*Cp*λ
Methods :
• TCR control
• PSF control
Fig : Output power of a wind turbine as a function of the wind speed
Fig : TCR control Fig : PSF control
CONCLUSION.. By using both DFIG and ZSI in wind energy systems we
can get more efficiency and control over the active and reactive powers. The proposed system has high performance, increased efficiency and reduced cost.
REFERENCES
F. Blaabjerg, Z. Chen, R. Teodorescu, F. Iov ” Powerelectronics in wind turbine system”, IPEMC 2006
yogesh n. murthy, “a review on power electronics applications on wind turbines”, IJRET , vol 2 , nov 2013
Veda Prakash Galigekere and Marian K. Kazimierczuk “role of power electronics for renewable energy system”, Wright State University
Frede Blaabjerg, Florin lov, Remus Teodorescu, Zhe Chen “Power Electronics in Renewable Energy Systems”, EPE-PEMC 2006
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