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Presentation To The Hon.CERC on performance of GEB Managed Thermal Power Stations

Presentation To The Hon.CERC on performance of GEB Managed Thermal Power Stations. New Delhi Nov.11,2003. Introduction. GEB Established under Section 5 of E(S) Act 1948 in 1960 Present network. Power Scenario of Gujarat during 2002-03.

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Presentation To The Hon.CERC on performance of GEB Managed Thermal Power Stations

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  1. Presentation To The Hon.CERC on performance of GEB Managed Thermal Power Stations New Delhi Nov.11,2003 Gen. Dept., GEB,HO,Vadodara

  2. Introduction • GEB Established under Section 5 of E(S) Act 1948 in 1960 • Present network Gen. Dept., GEB,HO,Vadodara

  3. Power Scenario of Gujarat during 2002-03 • Installed Capacity MW - 8576 • Max.Daily MUs Catered - 173 • Max.Daily GEB MUs Catered- 88.869 • Max.U/R Demand MW - 9040 • Max.Demand Catered MW - 7743 Gen. Dept., GEB,HO,Vadodara

  4. Generation Capacity for Gujarat System in MW • GEB GEN.capacity 4888 • Pvt. Sector Capacity 2156 • Central Sector (Share) 1532 • Gujarat System Total 8576 Gen. Dept., GEB,HO,Vadodara

  5. Generation and PLF for GEB Managed Thermal Power Stations YearGen.in MUSPLF% • 1998-99 22518 63.74 • 1999-00 24139 63.70 • 2000-01 25640 67.85 • 2001-02 25749 68.14 • 2002-03 26338 69.69 Gen. Dept., GEB,HO,Vadodara

  6. Our Good Performance attributed to the following activities • Maximize the utilization of available generation capacity • Adopted good O&M practices as suggested by CENPEEP. • Implementation of recommendations made by M/s TERI for fuel stock management • Carrying out R&M activities to improve Generation level at all power stations. • Use of washed coal up to 30% at Ukai TPS and imported coal up to 25% at Gandhinagar TPS. • Change of Milling system by MPSP system at Ukai TPS & Wanakbori TPS. • Energy and Thermal audit in thermal power stations. • Intensive boiler tube thickness survey during AOH. Gen. Dept., GEB,HO,Vadodara

  7. Implementation of recommendations made by Centre for Power Efficiency & Environment Protection(CENPEEP) for performance optimization • Performance Optimization with participation of working level engineers from operation, maintenance, C&I, O&E Deptt. • Fixation of monthly performance targets and action plan for major problem area by performance group. • Routine performance testing on boiler system with accurate instrument • Feed back of work done to promote efficiency,heat rate improvements Gen. Dept., GEB,HO,Vadodara

  8. Implementation of recommendations made by M/s TERI for fuel stock management • The stocks are not spreaded to entire length of the yard and are well organised and consolidated • Coal is stacked in smaller and regular shapes preferably trapezoidal or conical shapes to facilitate accurate measurement • Coal stocks are kept compressed by using dozers to remove air pockets to avoid fires • Bulk densities of compressed coal stock is determined regularly to arrive at an average figure for reporting actual physical stock Gen. Dept., GEB,HO,Vadodara

  9. Implementation of recommendations made by M/s TERI for fuel stock management (contd..) • Direct feeding of Indian coal is done to bunkers as far as possible to avoid unnecessary stocking/reclaiming • Coal stocks are used on first come first out basis to avoid deterioration in coal quality resulting in lowering of TPS performance • Ground stocks are minimised to reduce rehandling costs • Coal reject is being monitored vigorously so that it remains within the limit of 0.5 to 1 % • 100 % coal reject utilization. Gen. Dept., GEB,HO,Vadodara

  10. Major R&M activities on hand • RLA study for renovation of 2x120 MW units of Ukai TPS (BHEL) • RLA study for renovation of 2x120 MW units of Gandhinagar TPS ( NTPC) • Renovation programme for 2x 70 MW units of KLTPS • Repowering of 4x63.5 MW units of Dhuvaran TPS Gen. Dept., GEB,HO,Vadodara

  11. Saving due to reduction in aux.consumption and Sp. Oil consumption compared previous year for GEB & GSECL Thermal Power Stations Gen. Dept., GEB,HO,Vadodara

  12. Stationwise performance UKAI Gen. Dept., GEB,HO,Vadodara

  13. Stationwise performance G’nagar ( Unit 1 to 5) Gen. Dept., GEB,HO,Vadodara

  14. Stationwise performance Wanakbori ( Unit 1 to 7) Gen. Dept., GEB,HO,Vadodara

  15. Stationwise performance- Sikka Gen. Dept., GEB,HO,Vadodara

  16. Stationwise performance- KLTPS Gen. Dept., GEB,HO,Vadodara

  17. Stationwise performance- Dhuvaran TPS Gen. Dept., GEB,HO,Vadodara

  18. Stationwise performance- 135 MW Utran Gas based TPS Gen. Dept., GEB,HO,Vadodara

  19. Performance for 200/210 MW thermal units (13 units,cap-2710 MW) Gen. Dept., GEB,HO,Vadodara

  20. Performance for 120 MW thermal units (6 units, Cap-720 MW) Gen. Dept., GEB,HO,Vadodara

  21. Performance for 63.5 MW LSHS thermal units(4 units, Cap-254 MW) Gen. Dept., GEB,HO,Vadodara

  22. Performance for 140 MW LSHS thermal units(2 units, Cap-280 MW) Gen. Dept., GEB,HO,Vadodara

  23. Outage details for 200/210 MW thermal units (13 units,cap-2710 MW) In percentage Gen. Dept., GEB,HO,Vadodara

  24. Outage details for 120 MW thermal units (6 units, Cap-720 MW) In percentage Gen. Dept., GEB,HO,Vadodara

  25. Outage Details for 63.5 MW LSHS thermal units(4 units, Cap-254 MW) In percentage Gen. Dept., GEB,HO,Vadodara

  26. Outage Details for 140 MW LSHS thermal units(2 units, Cap-280 MW) In percentage Gen. Dept., GEB,HO,Vadodara

  27. Outage Details for 70/75 MW Lignite thermal units (3 units, Cap-215 MW) In percentage Gen. Dept., GEB,HO,Vadodara

  28. R & M Activities carried out during last five years Ukai TPS • Replacement of water gland sealing with steam gland sealing in 120 MW unit no.1 • Introducing MPSP system in all coal mills. • Replacement of bituminous class-B insulation of Generator stator winding with epoxy class-F insulation in unit no.3 &4 • Installation of Dual flue gas conditioning system to improve flue gas SPM emission level in unit no. 4 • Filling up of Dummy fields and providing microprocessor based control in ESP of Unit 3,4&5 to improve the performance of ESP. • Replacement of excitation system with static excitation system in unit no 1&2. Gen. Dept., GEB,HO,Vadodara

  29. R & M Activities carried out during last five years Gandhinagar TPS • Replacement of low temperature superheater in unit No 1 • Replacement of suction type coal mill with new pressure type coal mill in unit no.1. Work in progress for unit no.2 • Replacement of top and middle air preheater blocks in unit no.1. Work in progress for unit no. 2 • Renovation and Modernisation of complete ash disposal system in progress. • Replacement of 2 nos. ABB make 220 KV circuit breakers with SF6 circuit breakers. Gen. Dept., GEB,HO,Vadodara

  30. R & M Activities carried out during last five years Wanakbori TPS • Replacement of Air Pre heater elements in unit 1 to 6 • Replacement of coal mills by MPSP system with controlled rejection level in unit 1 to 6 • Replacement of condenser tubes in unit 1 to 3 • Replacement of HP heaters in unit 4 to 6 • Replcement of Jyoti make 6.6 kV min.Oil Ckt.breaker with vacuum SF6 circuit breaker • Replacement of economiser coils in unit 1,2,3 • Replacement of 1200 KW motors for ID and PA fans • Providing 100% leak proof gas isolators in flue gas path in unit 1 to 3 Gen. Dept., GEB,HO,Vadodara

  31. R & M Activities carried out during last five years Dhuvaran TPS • Residual Life Assessment of all 6 units carried out during 1999-00 • Replacement of old unserviceable HP heaters of unit no 1 to 4 • Construction of new IDCT for unit 5&6 • Replacement of 11 KV min.Oil circuit breaker with Jyoti make Vacuum circuit breaker Gen. Dept., GEB,HO,Vadodara

  32. Materials management • ARC for following consumable items to reduce procurement process time and the inventory level • MPSP mills spares • Ash plant spares • Bearings • Welding electrodes • All chemicals • Procurement of spares from OEM • Finalisation of orders within 90 to 120 days Gen. Dept., GEB,HO,Vadodara

  33. SERVICE LIFE OF GEB POWER STATIONS Gen. Dept., GEB,HO,Vadodara

  34. O&M expenses for UKAI TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  35. O&M expenses for Gandhinagar TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  36. O&M expenses for Wanakbori TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  37. O&M expenses for Sikka TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  38. O&M expenses for Dhuvaran TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  39. O&M expenses for Utran Gas based TPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

  40. Meritorious Awards received by GEB & GSECL Power Stations Gen. Dept., GEB,HO,Vadodara

  41. Meritorious Awards received by GEB & GSECL Power Stations Gen. Dept., GEB,HO,Vadodara

  42. Meritorious Awards received by GEB & GSECL Power Stations Gen. Dept., GEB,HO,Vadodara

  43. THANK YOU Gen. Dept., GEB,HO,Vadodara

  44. O&M expenses for KLTPS Rs in Crores Gen. Dept., GEB,HO,Vadodara

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