1. by A.D.Thirumoorthy Tamil Nadu Electricity Board India

2.  Large untapped potential in India ~ 65,000 – 100,000 MW  Technologies: Synchronous and Asynchronous Generators (with and without gears), New hybrid technologies are being introduced  Turbine unit sizes: 500 kW to 1.65 MW, may go up to 2.0 MW in near future  Leading States: Tamil Nadu – 4200 MW, Maharashtra – 1800 MW, Gujarat 1400 MW  Costs ~ Rs 6-6.5 Cr / MW subject to project size, location, technology

6.  Leading reactive power raises local voltage  Lagging reactive power lowers local voltage Add capacitors to counteract low voltage conditions Add reactors to counteract high voltage conditions, Turn off capacitors

7. V&I In Wind Mill

8. Voltage Harmonics

9. Current Harmonics

10.  This is a typical case of Wind Mills tripping due to Voltage Sag  Voltage Sag caused by tripping of another feeder in the same Sub Station due to earth fault  Rise in load current experienced  Suspect of induction Generator aiding the fault

11. Sample Dip

12. Voltage Dip in WM Feeder -49.61%

13. Current rise in WM Feeder +268%

14. Voltage Dip -51.4%

15. Tripping of WM Due to Sag Loss of WM Generation -42.5%

16.  This a case study of Voltage Swell  Voltage swell caused in a Wind Mill connected feeder  Voltage Swell seen when Wind Mill connected feeder is isolated manually  Voltage swell due to discharge of Capacitors connected for PF correction

17. Voltage Rise in WM During Supply Failure +11.37%

18. Voltage Rise in Wind Mill Feeder During Supply Failure +15.37%

19. Bipolar Transient

20. B-Phase voltage Drop put

21. Voltage SAG

22. Voltage Sag

23. Multiple Zero Crossing

24. Phase Shift Event

26. Sample Un-balance of Voltage

27. Transient

28. Transient due Tripping of Breaker due to inrush current

29. Flicker Data in Wind Mill

30. Sample Surge in Current

31. Swell in Current in Wind Mill

32. Active and Reactive Power in Wind Mill

33. Voltage Variation in Wind Mill

34. Frequency Profile

35. WM Generation Vs 110 KV Bus Voltage