O
Dear ALL
We have 120 MW Combine cycle power plant having Steam Turbine Generator (STG) 40 MW capacity BHEL Supplied.
The present Governing system is Eloctro Hydralic turbine controller.
We observe hunting in Main Oil Pump (Connected at turbine shaft) discharge pressure from 7.2 Kg/Cm2 to 6.4 Kg/Cm2. Normal pressure remain before this is around 8 Kg/Cm2.
Same way we have two Auxilary oil pump (AC Supply) and One Emmergency Oil Pump (DC Supply) connected with present oil system. All these three pump remain off and start at low main oil pressure at different pressure setting. Use for emmergency perpose. This three pumps are submerse type.
All pumps are connected in same Oil Tank having capacity of around 6300 ltr.
At the time of hunting we have check the DC Emmergency oil pump but there is no oil discharge pressure and also motor getting low ampere. same way we have checked both the Auxilary Oil pump but same way both generating pressure of around 1 Kg/cm2 instead of 8 Kg/cm2.
We have checked tank oil level found normal. checked quality of oil found normal.
There no disturbance observed in STG Output MW and governing valve.
Presently only main oil pump running with dischage pressure variation as mentioned.
We have 120 MW Combine cycle power plant having Steam Turbine Generator (STG) 40 MW capacity BHEL Supplied.
The present Governing system is Eloctro Hydralic turbine controller.
We observe hunting in Main Oil Pump (Connected at turbine shaft) discharge pressure from 7.2 Kg/Cm2 to 6.4 Kg/Cm2. Normal pressure remain before this is around 8 Kg/Cm2.
Same way we have two Auxilary oil pump (AC Supply) and One Emmergency Oil Pump (DC Supply) connected with present oil system. All these three pump remain off and start at low main oil pressure at different pressure setting. Use for emmergency perpose. This three pumps are submerse type.
All pumps are connected in same Oil Tank having capacity of around 6300 ltr.
At the time of hunting we have check the DC Emmergency oil pump but there is no oil discharge pressure and also motor getting low ampere. same way we have checked both the Auxilary Oil pump but same way both generating pressure of around 1 Kg/cm2 instead of 8 Kg/cm2.
We have checked tank oil level found normal. checked quality of oil found normal.
There no disturbance observed in STG Output MW and governing valve.
Presently only main oil pump running with dischage pressure variation as mentioned.