Turbine Emergency - Thermal Power Plant A-Z
Turbine Emergency - Thermal Power Plant A-Z
Turbine Emergency - Thermal Power Plant A-Z
TURBINE EMERGENCY
Lubricating Oil Temperature High.
Lubricating Oil Temperature Low.
C.W.Pump / Pumps Trip.
Fire in Turbine oil system..
Loss of Vacuum.
Exhaust hood temperature high.
Turbine Bearing Temperature High.
Axial Shift High.
TURBINE EMERGENCY
Eccentricity Highh.
Differential expansion High. ( Positive)
Differential expansion negative.
Bearing Vibration High.
Curtise Stage Pressure High.
Loss Of Barring Gear.
Condensor tube Leakage.
One side Quick closing valve or Interceptor valve close.
Water Induction in Steam turbine.
TURBINE EMERGENCY
Hydrogen Pressure Drop below permissible limit.
High Hydrogen Gas Pressure.
Hydrogen Purity Low.
Water Oil in Generator.
B.C.W. System Failure.
Instrument Air Failure.
1> TURBINE TRIP
CAUSE
Class B operated
Class A operated
MFT operated
Turbine over speed
Lub. Oil Pressure low
Distributing oil pressure low
Low condensor vacuum
Axial shift high
Hydro mechanical
Electromagnatic
1> TURBINE TRIP
CAUSE (cond..)
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9/16/2020 TURBINE EMERGENCY | THERMAL POWER PLANT A-Z
Low frequency
Turbine trip Push button pressed
Turbine trip Emergency leaver operated
L.P. heater 1 2 level high
Primary oil pressure high
Turbine Brg. Metal high.
*EFFECT
Turbine trip will actuate Class-A and MFT
Turbine Trip
Action:
Lit up the boiler
Find out the cause of the tripping and rectify
If it is not possible to roll turbine put it on B.G.
If every thing is O.K. reset turbine trip (class-B) relay.
Roll the turbine when turbine speed reduces to 1000 rpm ( if parameters permits)
Bring the turbine at 3000 rpm after giving required warm up time.
Keep watch on turbine diff. Expansion, Brg. Vib, & ecentricity
ACTION:
Take H.P. Heaters level controller on manual and maintain the level.
Check the operation of heaters’ drain to HPDFT valve, drain to LPH –5 valve open it manually if required.
Adjust dearator pressure , if it is more.
Adjust the steam attraction pressure if valves are throttle open them.
By pass HP Heaters manually if level is very high and are not getting bypassed on auto.
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