| Forced Outages and Energy losses Due to Failure of Equipment and Auxiliaries in Thermal Power Stations (Capacity 25-99 MW) in India (2009-2010 to 2011-2012) | |||||||||
| Area/Cause of Outages | No. of Outages | MU Loss | %age of Group F.O. Loss | ||||||
| 2009-10 | 2010-11 | 2011-12 | 2009-10 | 2010-11 | 2011-12 | 2009-10 | 2010-11 | 2011-12 | |
| Equipments | |||||||||
| Boiler | |||||||||
| Water Wall Tube Leakage | |||||||||
| Super Heater Tube Leakage | |||||||||
| Re-Heater Tube Leakage | |||||||||
| Economizer Tube Leakage | |||||||||
| Air Pre-Heater Problems | |||||||||
| Furnace Trouble | |||||||||
| Boiler Operational Problems | |||||||||
| Furnace Fire Out/Flame Failure | |||||||||
| Furnace Draft Abnormal | |||||||||
| Drum Level High/Low | |||||||||
| Other Misc. Problems . | |||||||||
| Total Boiler | |||||||||
| Turbine | |||||||||
| Turbine Bearing Problems | |||||||||
| Governing /Oil System Failures | |||||||||
| Turbine Differential Expansion Problem | |||||||||
| Axial Shift/Thrustpad Problem | |||||||||
| Turbine Eccentricity /High Vibrations | |||||||||
| Turbine Rotor Failure/Damaged | |||||||||
| Turbine Control Valve Problem | |||||||||
| Condenser Tube Leakage/Cleaning | |||||||||
| Main Steam Line Problem | |||||||||
| Emergency Stop Valve (ESV) Closure | |||||||||
| Condenser Low Vacuum | |||||||||
| H.P/Lp By-Pass System | |||||||||
| Other Misc. Problems . | |||||||||
| Total Turbine | |||||||||
| Generator | |||||||||
| Stator/Stator Earth Fault | |||||||||
| Rotor/Rotor Earth Fault | |||||||||
| Gen. Transformer | |||||||||
| Excitation Problems | |||||||||
| Gen. Cooling System Failure | |||||||||
| Seal Oil System Problem | |||||||||
| Gen. Bearing Problem | |||||||||
| Fire In Gen. Bushing/Bushing Failure | |||||||||
| A.V.R. Problems | |||||||||
| Generator Transformer Protection Relay Operation Problem | |||||||||
| Hydrogen System | |||||||||
| Other Misc. Problems . | |||||||||
| Total Generator | |||||||||
| Auxiliaries | |||||||||
| Boiler Auxiliaries | |||||||||
| I.D. Fans Problem | |||||||||
| F.D. Fans Problem | |||||||||
| P.A. Fans Problem | |||||||||
| Milling System /Rc Feeder Problem | |||||||||
| Pipes And Valves | |||||||||
| Other Misc. Problems . | |||||||||
| Total Boiler Aux. | |||||||||
| Turbine Auxiliaries | |||||||||
| Boiler Feed Pump Problems | |||||||||
| Condensate Pump Problems | |||||||||
| C.W. Pump Problems | |||||||||
| Regenerative System Problem | |||||||||
| Pipes And Valves (Turbine Aux.) | |||||||||
| De-Aerator System Problem | |||||||||
| Other Misc. Problems . | |||||||||
| Total Turbine Aux. | |||||||||
| Total Boiler & Turbine Aux. | |||||||||
| Others Misc. Problems | |||||||||
| Other Electrical Problems | |||||||||
| Unit Aux. Transformer/Station Transformer Problems | |||||||||
| H.T./L.T. Supply Problem | |||||||||
| Dc Supply Problem | |||||||||
| Switch Yard/Bus Bar Problem | |||||||||
| Breaker/Isolator Problems | |||||||||
| Misc. Fire Hazards /Fire In Cable Gallery | |||||||||
| Instrumentation Problem | |||||||||
| Air Supply Problem | |||||||||
| Other Electrical Miscellaneous | |||||||||
| Subtotal | |||||||||
| Fuel And Other Misc. Problems | |||||||||
| Coal/Lignite Shortage/Feeding Problem | |||||||||
| Wet/Poor Quality Coal/Lignite | |||||||||
| Fuel Oil Problem | |||||||||
| Cooling Tower Problem | |||||||||
| Ash Handling System Problem | |||||||||
| Raw Water Problem | |||||||||
| D.M. Water Problem | |||||||||
| E.S.P. Problem | |||||||||
| Non-Readiness of Residual Work of New Unit | |||||||||
| Vintage Unit Withdrawn And Closed For Operation | |||||||||
| Other Misc. Problems | |||||||||
| Subtotal | |||||||||
| Grid System | |||||||||
| Transmission Constraints/Grid Disturbance | |||||||||
| Reserve Shut Down | |||||||||
| Subtotal | |||||||||
| Total Miscellaneous | |||||||||
