This document discusses using a STATCOM to improve power quality in a grid-connected wind energy system. A STATCOM is a voltage-source converter that can compensate for voltage fluctuations on AC transmission lines. The document examines power quality issues like voltage variations and harmonics in wind energy systems. It presents test results showing that a STATCOM maintains the source voltage and current in-phase to support the reactive power demand of the wind generator and load. The STATCOM fulfills power quality standards and can eliminate or reduce voltage fluctuations at the plant input.

1. A
STATCOM-Control Scheme
for
Grid Connected Wind Energy
System
for
Power Quality Improvement

2. WIND ENERGY GENERATING SYSTEM
Load
kinetic
Energy
Mechanical
Energy
Electrical
Energy

3. International Electro-Technical Commission (IEC) Guidelines.
Technical Challenges.
Non-Linear Loads.
Development of Grid Co-ordination Rule.

4. POWER QUALITY ISSUES
Voltage variation
Harmonics
Self Excitation of Wind Turbine Generating System
Wind turbine location in power system.

6. STATCOM
A STATCOM is a voltage-source converter.
Voltage compensation across the ac transmission Line.
Increased line stability during transients.
Commonly used for dynamic power factor correction.
Elimination (or at least a major reduction) of voltage fluctuations at the plant
input.

8. BATTERY ENERGY STORAGE SYSTEM
(BESS)
&
Bang-Bang Controller

9. Voltage compensation of ac transmission lines using a STATCOM

11. Grid Connected System for Power Quality Improvement

13. Source voltage and Current waveforms of test system
without Wind farm and STATCOM

14. Source voltage and Current waveforms without STATCOM

15. Source voltage and current waveforms with STATCOM

16. CONCLUSION
• The power quality issues and its consequences are presented.
• STATCOM has a capability to cancel out the harmonic parts of the load current.
• STATCOM maintains the source voltage and current in-phase and support the
reactive power demand for the wind generator and load at PCC.
• Thus the proposed scheme fulfills the power quality norms as per the IEC
standard 61400-21.

17. APPLICATIONS
Power system voltage control applications.
Large electric arc furnace installations.
Reactive power compensation applications.
Railway or underground systems with huge load variations.

18. FUTURE SCOPE
• STATCOM can be replaced with UPQC for better power control.
• Replacing the induction generator with doubly fed induction generator is
preferred for better results.
• In future the off-shore wind turbines will be implemented due to its advantages
of producing high power.
• SVC MaxSine STATCOM Solution for future.