Power Grid failure: a reasonbehind blackoutEr. Ishu SethiPast: Uiet, Panjab university, chandigarhmbishu911@yahoo.com
July 30 , 0233 hrs. IST¤ Power outage in NorthernIndia¤ 8 states plunged into darkness
July 31 , 1302 hrs. IST¤  Power outage in Northern , Eastern & North eastern India¤  Nearly half of Indias population af...
Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota...
Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota...
Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota...
Suspected Reasons¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota¤  Overl...
Power drawl (July 30 0200 hrs.)State Schedule(MW)Actual(MW)OD (+) / UD (-)(MW)Punjab 4850 5426 576Rajasthan 1861 1474 -387...
Power overdrawl (July 30 0200 hrs.)State % Over drawlPunjab 11.87Haryana 21.03UP 12.94www.powermin.nic.inwww.cercind.gov.in
Power drawl (July 30 0230 hrs.)State Schedule(MW)Actual(MW)OD (+) / UD (-)(MW)Punjab 4769 5092 323Rajasthan 1717 1379 -338...
Power overdrawl (July 30 0230 hrs.)State % Over drawlPunjab 6.77Haryana 19.99UP 15.63
¤ Violating grid discipline and overdrawingmay be regular phenomenonPreventive measure¤  Isolate some lines.¤ Borrow po...
Borrow power fromother grids
Antecedent conditions (30 July)www.cercind.gov.in
Overloading of Gwalior-Agratransmission line¤  line overloading. (limit-691 MW, powerflowed- 1400 MWPreventive action¤ D...
How the Grid FailedSecond circuit of Bina-Gwalior-Agra line isclosed since July 28 forup gradation to 765 kVlevel* The clo...
Power Swing¤  For large disturbances, Angular separation betweengenerators goes on increasing.¤  Wrong operation of dist...
Angular separationwww.cercind.gov.in
Frequency profile (30 July)www.cercind.gov.in
Non operation of Under freq. relays¤ Northern Region has 10000 MW loadshedding envisaged through Underfrequency relays, d...
Both states, Power Grid to be blamedfor blackout¤ States overdraw power beyond theirscheduled quota.¤ Power Grid ordered...
Excessive OverdrawingOverloadingPower SwingGrid CollapseWhat welearnt
Northern Grid Hit by Underdrawl(5 feb, 2013)¤  31 main transmission lines tripped due to high voltage.¤  demand dipped f...
Northern Grid Hit by Underdrawl(5 feb, 2013)¤  grid frequency reached 50.67 Hz at 0300 hrs.¤  Ironically, states such as...
What could be done¤ Strict action must be taken against stateswhich disobey the GRID discipline.¤ Replace traditional di...
What could be done¤ Power Swing Block (PSB) function preventunwanted distance relay operation duringpower swings.¤ Need ...
SMART GRID¤  Convergence of Information Technology (IT),communication technology and electrical infrastructure¤  Gather ...
Thank you !A presentation by Ishu SethiContact-ishusethi9@gmail.commbishu911@yahoo.com
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
Grid failure on 30th july 2012
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Grid failure on 30th july 2012

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2012 indian blackout, power system failure, grid failure, load encroachment, power swing, cascade tripping of transmission lines.

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Grid failure on 30th july 2012

  1. 1. Power Grid failure: a reasonbehind blackoutEr. Ishu SethiPast: Uiet, Panjab university, chandigarhmbishu911@yahoo.com
  2. 2. July 30 , 0233 hrs. IST¤ Power outage in NorthernIndia¤ 8 states plunged into darkness
  3. 3. July 31 , 1302 hrs. IST¤  Power outage in Northern , Eastern & North eastern India¤  Nearly half of Indias population affected¤  22 out of 28 states in India, without power
  4. 4. Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota¤  Overloading of Gwalior-Agra transmission linePeople¤  Low water level in Bakhra Dam¤  Sir Rajnikant charging his laptop
  5. 5. Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota¤  Overloading of Gwalior-Agra transmission linePeople¤  Low water level in Bakhra Dam¤  Sir Rajnikant charging his laptop
  6. 6. Reasons behind the failure¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota¤  Overloading of Gwalior-Agra transmission linePeople¤  Low water level in Bakhra Dam¤  Sir Rajnikant charging his laptop
  7. 7. Suspected Reasons¤  Overdrawing of power by states namely Uttar Pradesh,Punjab, Haryana than the scheduled Quota¤  Overloading of Gwalior-Agra transmission line
  8. 8. Power drawl (July 30 0200 hrs.)State Schedule(MW)Actual(MW)OD (+) / UD (-)(MW)Punjab 4850 5426 576Rajasthan 1861 1474 -387Haryana 2648 3205 557Delhi 3088 2805 -283Uttarakhand 512 593 81HP 43 -88 -131UP 5587 6310 723JK 694 -15 -709Chandigarh 295 230 -65www.cercind.gov.in
  9. 9. Power overdrawl (July 30 0200 hrs.)State % Over drawlPunjab 11.87Haryana 21.03UP 12.94www.powermin.nic.inwww.cercind.gov.in
  10. 10. Power drawl (July 30 0230 hrs.)State Schedule(MW)Actual(MW)OD (+) / UD (-)(MW)Punjab 4769 5092 323Rajasthan 1717 1379 -338Haryana 2586 3103 517Delhi 2987 2715 -272Uttarakhand 475 636 161HP 88 -93 -181UP 5475 6331 856JK 683 -1 -683Chandigarh 295 234 -61www.cercind.gov.in
  11. 11. Power overdrawl (July 30 0230 hrs.)State % Over drawlPunjab 6.77Haryana 19.99UP 15.63
  12. 12. ¤ Violating grid discipline and overdrawingmay be regular phenomenonPreventive measure¤  Isolate some lines.¤ Borrow power from other Grids
  13. 13. Borrow power fromother grids
  14. 14. Antecedent conditions (30 July)www.cercind.gov.in
  15. 15. Overloading of Gwalior-Agratransmission line¤  line overloading. (limit-691 MW, powerflowed- 1400 MWPreventive action¤ Divert load to available parallel lines.
  16. 16. How the Grid FailedSecond circuit of Bina-Gwalior-Agra line isclosed since July 28 forup gradation to 765 kVlevel* The closure of this ckt. At a timewhen demand is high was themistake done by powergrid1. Line trippings initially dueto load encroachment andthen due to power swings3. Not enough loadshedding seen. Once thefreq. fell below 47.5 Hz , itled to automatic trippingof generators, ultimatelywhole grid collapsed2.Huge gap b/wdemand and supplyonce the NR gird gotseparated from WR andER grid.
  17. 17. Power Swing¤  For large disturbances, Angular separation betweengenerators goes on increasing.¤  Wrong operation of distance relay, undesired tripping oftransmission lines , leading to cascading outages.
  18. 18. Angular separationwww.cercind.gov.in
  19. 19. Frequency profile (30 July)www.cercind.gov.in
  20. 20. Non operation of Under freq. relays¤ Northern Region has 10000 MW loadshedding envisaged through Underfrequency relays, df/dt relays.¤ Rapid frequency decline shows nonoperation of UFL¤ Matter of serious concern
  21. 21. Both states, Power Grid to be blamedfor blackout¤ States overdraw power beyond theirscheduled quota.¤ Power Grid ordered closure of secondcircuit of Agra– Gwalior line.¤ Up gradation should have been doneduring the lean season and not whenpower demand is at its peak
  22. 22. Excessive OverdrawingOverloadingPower SwingGrid CollapseWhat welearnt
  23. 23. Northern Grid Hit by Underdrawl(5 feb, 2013)¤  31 main transmission lines tripped due to high voltage.¤  demand dipped from 29,000 MW to 18,000 MWwww.hindustantimes.com
  24. 24. Northern Grid Hit by Underdrawl(5 feb, 2013)¤  grid frequency reached 50.67 Hz at 0300 hrs.¤  Ironically, states such as UP, Punjab and Haryana, wereagain to be blamed for the high voltagewww.hindustantimes.com
  25. 25. What could be done¤ Strict action must be taken against stateswhich disobey the GRID discipline.¤ Replace traditional distance relay withModern distance relays.
  26. 26. What could be done¤ Power Swing Block (PSB) function preventunwanted distance relay operation duringpower swings.¤ Need to convert the existing GRID into a SMARTGRID
  27. 27. SMART GRID¤  Convergence of Information Technology (IT),communication technology and electrical infrastructure¤  Gather information about behaviors of suppliers andconsumers, in an automated fashion¤  SMART METERS- variable billing¤  Improved efficiency, reliability and sustainability of theproduction and distribution of electricity
  28. 28. Thank you !A presentation by Ishu SethiContact-ishusethi9@gmail.commbishu911@yahoo.com

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