ositive cycle of the modulation signal, when the modulation is greater than Triangle 1 and Triangle 2, then S1ap and S2ap are turned on and also during the positive cycle S2ap is completely turned on. When S1ap and S2ap are turned on the converter switches to the + Vdc / 2 and when S1an and S2ap are on, the converter switches to zero and hence during the positive cycle S2ap is completely turned on and S1ap and S1an will be turning on and off and hence the converter switches from + Vdc / 2 to 0. During the negative

1. “Voltage oscillation Mitigation of Wind Farm Using a STATCOM”

2. Abstract
• Injection of the wind power into an electric grid affects the power
quality. The performance of the wind turbine and thereby power
quality are determined on the basis of measurements and the norms
followed according to the guideline specified in International Electro-
technical Commission standard,IEC-61400. The influence of the wind
turbine in the grid system concerning the power quality
measurements are measured according to national/international
guidelines.
• In this proposed scheme Static Compensator (STATCOM) is
connected at a point of common coupling with a battery energy
storage system (BESS) to mitigate the power quality issues. The
battery energy storage is integrated to sustain the real power source
under fluctuating wind power.

3. Outline
• Wind Energy
• Wind Turbine
• Indication Generator
• Power Quality Parameter
• Voltage Fluctuation
• FACT’s Device
• The STATCOM
• Power Quality Improvement
• System Model
• Simulation result
• Conclusion
• Future Scope
• Reference

4. Wind Energy
Wind energy is best alternative of conventional
energy resources in the world . wind energy
growing as an main electricity sources . Wind
energy result from the movements of air due to
atmospheric gradient

5. Wind Turbine
• A wind turbine is a device that converts the
wind's kinetic energy into electrical energy.

6. Induction Generator
• An induction generator or asynchronous generator is
a type of alternating current (AC) electrical generator
that uses the principles of induction motors to
produce power. Induction generators operate by
mechanically turning their rotors faster than
synchronous speed.

7. Power Quality Parameter
• Reliability :- continuous availability,
interruption/breakdown/outage free
• Voltage- flicker, swell, sag/dip, unbalance
• Frequency- drop or rise
• Harmonics contains- SCR, converters, inverters
etc.
• Transients

8. • Voltage Sags :- A reduction in RMS voltage or current at
the power frequency.
• Voltage Surge:- voltage variation can be positive (higher
than normal) or negative (lower than normal) 
• Transients:- it manifest only as a short duration change
in voltage due to switching ON and OFF the loads. 
• Harmonics:- it is an integer multiple of fundamental
frequency in the sine wave of power supply or simply
distortion of waveforms. 
• Lightning:- It produces very high currents, for a short
time interval, but enough to cause fires or to destroy
microcircuits.

9. Voltage Fluctuation
• Voltage fluctuations are generally caused by
loose or corroded connections at either the
house or on the power lines, and are often
noticed by flickering lights.

10. FACT’s Devices
• Flexible Alternating Current Transmission
System (FACTS) is a static equipment used for
the AC transmission of electrical energy. It is
meant to enhance controllability and increase
power transfer capability. It is generally a
power electronics based device.

11. The STATCOM
• The Static Synchronous Compensator
(STATCOM) is a shunt device of the Flexible AC
Transmission Systems (FACTS) family using
power electronics to control power flow and
improve transient stability on power grids

12. Power Quality Improvement
• Power Quality is a combination of Voltage
profile, Frequency profile, Harmonics contain
and reliability of power supply.
• The Power Quality is defined as the degree to
which the power supply approaches the ideal
case of stable, uninterrupted, zero distortion
and disturbance free supply

13. SOURCES OF POOR POWER QUALITY
• Non linear loads
• Arcing loads
• Switching operation
• Reactive loads
• Atmospheric condition
• Unstable loads
• Neighboring unbalance system

14. IMPACT OF POOR POWER QUALITY
• The effect of poor power quality problems has serious implication
on the utilities and customers. Higher losses in transformers,

cables .
• Neutral wire burning due to third harmonics generated by non
linear loads. Power factor capacitors may punctures.

• Energy meters will give faulty readings. Solid state protective

relays may damaged . Speed drives may shut down.

• Motor will increase core and cu losses Non sinusoidal

waveforms will reduce the efficiency of motors. 
• Electronic computer may loss data due to voltage variation .
• Domestics TV and other equipment are affected by the poor quality

15. Layout Of SATACOM connected Wind Farm

16. Simulation Analysis

17. Simulation Result

18. CONCLUSIONS
As we know that the FACT’s devices have very
fast time response characteristics, so here
STATCOM is used to improve the power quality
of wind farm. STATCOM produces reactive
power, this reactive power reduces the
oscillation. Thus it is clear that the wind park
system power quality can be improved by using
STATCOM.

19. Reference
• [1]James F. Manwell, Jon G. Mcgowan, Anthony (2009) Wind Energy Explained: Theory, Design and Application, 2nd
Edition
•
• [2]Tony Burton, Nick Jenkins, David Sharpe (2011) Wind Energy Handbook , 2nd
Edition
•
• [3] Jürgen Schlabbach, Dirk Blume, Thomas Stephanblome (2008) Voltage Quality in Electrical Power Systems
•
• [4] T. Thüringen ,(2004) , Flicker contribution from wind turbine installations , IEEE Transactions on Energy Conversion ( Volume: 19 , Issue: 1, March 2004 )
•
• [5]David Rivkin, Laurel Silk (2011) wind turbine operations, maintenance, diagnosis and Repair
•
• [6]Tagare (2004) Reactive Power Management Published in Tata McGraw-Hill Education India
• [7]Robert W. Righter (2008): Wind Energy in America: A History
•
• [8]Mircea Eremia, Chen-Ching LIU (2007) Advanced Solutions in Power Systems: HVDC, FACTS, 3rd Edition.
•
• [9] Chen-ching liu, Stephen Mcarthur, seung-jae lee (2011) Smart Grid Handbook, 3 Volume Set, Volume 1
•
• [10]Muhammad H. Rashid (2008) Power Electronics , 4th Edition
•
• [11] Vikas Goyal, Rakesh Singh Lodhi(2016) Reactive power compensation through upfc and statcom at linear & non-linear load , International Journal of Scientific &
Engineering Research, Volume 7
•
• [12] Enrique Acha (2005) Power Electronic Control in Electrical Systems , 4th Edition
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