Download - Governing .Gif
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KWU GOVERNING SYSTEMBASICS OF GOVERNING SYSTEM DRAWINGS ARE NOT AS PER ACTUAL THIS PRESENTATION HAS BEEN PREPARED JUST FOR UNDERSTANDING THE SYSTEM
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HP TURBINE MS
IP TURBINE
LP TURBINE
TG SET
CRH NRV
HPSV HPCV
IPSV IPCV
GENERATOR
HPCV CRH NRV HPSV
IPCV IPSV
MS
HRH
CondenserBOILER
GENERAL SCHEMESteam from boiler
Opening SV Opening CV Turbine Rolling Synchronization De-acceleration Acceleration Tripping
Turbine/Unit LockOut TrippingSteam to turbine
100MW 80MW 120MW 120MW 80MW 3000rpm 3000RPM 2900 rpm 3000rpm 3100rpm
80MW 100MW 120MW
Turbine
Generating StationGenerator Speed
Load Consumer
3150
3100
3000
2900
2850
1500
180
Different oils, their colour codes, sources and purpose in KWU Governing SystemS.No 1. Name of Oil Source & pressure MOP/AOP ( 7-8.5 Kg/cm2) Purpose
LEGENDSColour Code
Control Oil
To establish Trip Oil, Aux Trip Oil, Trip Oil, Start-up Oil, Aux Start-up Oil, Aux Secondary Oil, Secondary Oil, Primary Oil, Etc To reset , Open & Trip stop valve To trip Hydraulic Trip Device To assist Resetting & Opening Stop Valves To Reset Main Trip Valve & Hydraulic Trip Device Input Signal to Hydraulic Converter
2. 3. 4.
Trip Oil Aux Trip Oil Start-up Oil
Main Trip Valve (4.8-6 Kg/cm2) Main Trip Valve (4.8-6 Kg/cm2) Starting Device ( 5.5 Kg/cm2) Starting Device ( 5.5 Kg/cm2)
5.
Aux Start-up Oil6. Speeder Gear ( 2.3-4.8 Kg/cm2)
Aux Secondary Oil7.
Secondary Oil (HP/IP) Primary Oil
Hyd/Electro-Hyd Converter ( 0-6 Kg/cm2)
To govern HP/IP Control Valve opening
8. 9. 10.
Primary Oil Pump ( 0-2.3 Kg/cm2) Over Speed Test Device ( 2.0 Kg/cm2)
Feedback speed signal for HG To test Over Speed Test Device
Test OilDrains
CONTROL OIL OIL TAKEN FROM AOP/MOP DISCHARGE HEADER FOR THE GOVERNING SYSTEM TRIP/AUX TRIP OILTHESE TWO OIL CIRCUITS ARE ESTABLISHED THROUGH MAIN TRIP VALVES UNDER RESET CONDITION.
START-UP/AUX START-UP OIL THESE TWO OIL CIRCUITS ARE ESTABLISHED TO ITS PEAK PRESSURE THROUGH STARTING DEVICE AT 0% POSITION AND PRESSURE STARTS REDUCING WHEN POSITION OF THE STARTING DEVICE IS RAISED. AUX SECONDARY OIL THIS OIL CIRCUIT IS NOTHING BUT OUTPUT OF HYDRAULIC GOVERNOR AND INPUT TO HYDRAULIC CONVERTER. SECONDARY OIL CONVERTER. OUTPUT OF HYDRAULIC/ELECTRO-HYDRAULIC
TEST OILTHIS OIL CIRCUIT IS ESTABLISHED TO TEST OVER SPEED TRIP DEVICE WHEN TURBINE IS RUNNING AT RATED SPEED.
REMOTE TRIP SOLENOID VALVESTHESE ARE TWO IN Nos. AND WHEN ANY TURBINE TRIP GETS INITIATED, THE SOLENOIDS GETS ENERGISED AND CONTROL OIL GETS DRAINED THROUGH THE VALVES AND TRIPS THE MTV. MAIN TRIP VALVESTHESE ARE TWO IN Nos. AND CALLED THE MAIN TRIP GEAR. ALL THE TURBINE TRIPPINGS TAKE PLACE THROUGH THIS DEVICE. UNDER NON-TRIP CONDITION ESTABLISHES TRIP & AUX TRIP OIL AND USED FOR RESETTING/OPENING THE STOP VALVES AND PRODUCING HP/IP SECONDARY OIL.
STARTING DEVICE AS THE NAME OF THIS DEVICE SUGGESTS, THIS DEVICE IS USED FOR RESETTING AND OPENING THE STOP VALVES AND , MAIN TRIP VALVES & HYDRAULIC TRIP DEVICES. THIS DEVICE EITHER BE OPERATED MANUALLY BY HAND WHEEL OR FROM REMOTE (MCR) THROUGH MOTORISED ACTUATOR. SPEEDER GEAR THIS DEVICE IN COMBINATION WITH STARTING DEVICE FORMS HYDRAULIC GOVERNOR AND PROVIDES INPUT HYDRALIC SIGNAL TO HYDRAULIC CONVERTER. THIS DEVICE EITHER BE OPERATED MANUALLY BY HAND WHEEL OR FROM REMOTE (MCR) THROUGH MOTORISED ACTUATOR. HYDRAULIC/ELECTRO-HYDRAULIC CONVERTERAMPLIFIES&CONVERTS HYDRAULIC /ELECTRICAL SIGNALS TO HYDRAULIC SIGNALS ( HP/IP SECONDARY OIL) FOR THE OPERATION OF HP/IP CONTROL VALVE. HYDRAULIC TRIP DEVICESTHESE DEVICES PROVIDE MANDATORY PROTECTIONS OF THE TURBINE BY DRAINING AUX TRIP OIL. THESE DEVICES ARE RESET BY AUX STARTUP OIL.
BLOCK DIAGRAM OF GOVERNING SYSTEMFiltered Control OilAOP Filter Trip Oil
TEST V/V
STOP V/V SERVO MOTOR
Remote Trip Solenoid Valves
Main Trip ValvesSTOP & CONTROL VALVE CONTROL VALVE SERVO MOTOR Secondary Oil Aux Trip Oil
MOP AOP Discharge header
Aux Start-up Oil
Electro-Hyd Converter
Hyd Converter
Start-up Oil
Starting Device
Filtered Controlled Oil
Hyd. Trip Device
RAISING STARTING DEVICE POSITION TO DE-PRESSURISE BRINGING& AUX STATR-UP OIL TO OPEN STOP VALVES AND START-UP THE STARTING DEVICE TO 0 POSITION TO BUILD START-UP & AUX STATR-UP OIL TO RESET STOP& MAIN TRIP PRODUCING AUX SECONDARY OIL VALVES AND HYD. TRIP DEVICEHand Wheel Motor
STARTING DEVICETO MTV & HTD V/VCONTROL OIL FROM AOP/MOP
Drain
Aux Start-up Oil (0 Kg/cm2) (5.5 Kg/cm2)
TO TEST V/V OF STOP V/VDrain
Start-up Oil (5.5 Kg/cm2) (0 Kg/cm2)
75 50Starting Device In %
100
25 0
STARTING DEVICE
Position at MCR
RESETTING OF MTV FOR TRIPPING OF TRIP/AUX ESTABLISHINGMTV FOR KILLING TRIP OIL TRIP OIL
MAIN TRIP VALVE
DRAIN
TRIP OIL TO RESET/OPEN STOP VALVE & FOLLOW-UP VALVES ETC TO PRODUCE SECONDARY OIL (4.8-6.0 Kg/cm2) SECONDARY OIL (0 Kg/cm2)
CONTROL OIL FROM AOP/MOP(6-8.5 Kg/cm2)
AUX TRIP OIL TO HYDRAULIC TRIP DEVICES (4.8-6.0 Kg/cm2) TRIP DEVICES (0 Kg/cm2)
AUX START-UP OIL FROM STARTING DEVICE (0 POSITION)
RESETTING OF MTVA O P D i s h a r g e h e a d e r AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES AOP/ MOP
REMOTE TRIP SOLENOID OPERATED VALVESTRIP OIL TO HOLD STOP V/VS & AND TO PRODUCE SECONDARY OIL
CONTROL OIL FROM AOP/MOPFilter
DRAIN
AUX START-UP OIL TO RESET MTV & HTD
TRIPPING OF MTV THROUGH RTSV (ELECTRICAL)
TRIPPING THROUGH RTSV
REMOTE TRIP SOLENOID OPERATED VALVESTRIP OIL TO HOLD STOP V/VS & AND TO PRODUCE SECONDARY OIL
CONTROL OIL FROM AOP/MOPFilter
DRAIN
AUX START-UP OIL TO RESET MTV
AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES
TRIPPING OF MTV THROUGH HYDRAULIC TRIP DEVICE (MECHANICAL)
TRIPPING THROUGH HYD TRIPDEVICEREMOTE TRIP SOLENOID OPERATED VALVES
TRIP OIL TO HOLD STOP V/VS & AND TO PRODUCE SECONDARY OIL
CONTROL OIL FROM AOP/MOPFilter
DRAIN
AUX START-UP OIL TO RESET HYD TRIP DEVICES AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES
AUX START-UP OIL TO RESET MTV
HYDRAULIC TRIP DEVICEAUX TRIP OIL TO THE HYDRAULIC TRIPING DEVICES
RESETTING OF RTSV, HYD. TRIP DEVICES & MTV THROUGH
RESETTING OF RTSV, HYD. TRIP DEVICES & MTV THROUGH REMOTE TRIP SOLENOID OPERATED VALVES
TRIP OIL TO HOLD STOP V/VS & AND TO PRODUCE SECONDARY OIL
CONTROL OIL FROM AOP/MOPFilter
DRAIN
AUX START-UP OIL TO RESET MTV
AUX START-UP OIL TO RESET HYDRAULIC TRIP DEVICES
HYDRAULIC TRIP DEVICEAUX TRIP OIL TO THE HYDRAULIC TRIPING DEVICES
STOP V/V OPERATIONSTART-UP OIL TO TEST V/V TRIP OIL TO STOP V/V RTSVSTEST VALVE
MTV
DRAIN
Filter
AUX START-UP OIL TO MTV
S/D
AUX START-UP OIL TO HYD TRIP DEVICE HYD TRIP DEVICE AUX TRIP OIL TO HYD TRIP DEVICE
STOP VALVE SERVOMOTOR
OPENING OF STOP VALVES BY RAISING RESETTING OF RTSV(DE-ENERGIZING) & STARTING DEVICE HYD. TRIP DEVICES & MTV THROUGH DRAIN STARTING DEVICE AT 0 POSITION
STOP VALVE
STOP VALVE SERVO-MOTOR
RESETTING/OPENING/TRIPPING OF STOP VALVE
TRIP OIL ABOVE PISTON CYLINDER SPRING
Drain
PISTON SPRING DISC PISTON DISC
TRIP OIL BELOW PISTON DISC
TRIPPING RESETTING OPENING
TURBINE OVERSPEED TRIP DEVICEAUX START-UP OIL TO RESET AUX TRIP OIL
FLY BOTL Drain
Aux Trip Oil
TURBINE OVERSPEED TRIP DEVICE
THRUST BEARING TRIP DEVICEAUX START-UP OIL TO RESET TURBINE SHAFT AUX TRIP OIL
TEST OIL
RESETTING OF Thrust Bearing TRIPPING OF Thrust Bearing TRIP DEVICE
Drain
Resetting Of Low Vacuum Trip Device Tripping Of Low Vacuum Trip DeviceVacuum Atmosphere
Low Vacuum Trip Device
Drain Control Oil Aux Trip Oil Drain
LOW VACUUM TRIP DEVICE
Aux Follow-up Piston
HYDRAULIC GOVERNORAux Secondary Oil To Hyd. Governor
Starting Device
Speeder Gear
7550Trip Oil From MTV
100
25 0
Speeder Gear In %
Aux Follow-up Valve Control Oil Primary Oil (0-2.3Kg/cm2) Speeder Gear Primary Oil Pump
75 50 25 0
100
Starting Device In %
Starting Device
Link
Starting Device Speeder Gear
Aux Follow-up Piston Aux Secondary Oil To Hyd. Governor
Start-up oil
75
100
50Control oil
25 0
Starting Device In %
Aux Start-up oil
7550Primary Oil LINK Primary Oil Pump Starting Device In %
100
25 0
Trip oil From MTV
HP Sec. Oil
HG & EHGAux Sec Oil from S/G Hydraulic Converter Amplifier PistonControl Oil
Follow - up valves IP Sec. Oil
Trim Device
HP Sec. Oil Electro-Hydraulic Converter0-10V Supply from ATRS Control Oil
Trip Oil From MTV
Follow - up valves IP Sec. Oil
Amplifier PistonTrim Device
Trip Oil From MTV
HG/EHG
INPUT
HYD MINM SELECTIONGOVERNER OUTPUT 0% DRAIN 100% OPEN OR 0% CLOSE
GOVERNER OUTPUT 100% DRAIN 0% OPEN OR 100% CLOSE
ORIFICE
HYDRAULIC MINIMUM SELECTION
ELECTRO-HYD GOVERNOR
HYDRAULIC GOVERNOR
DRAIN-1 OUTPUT
DRAIN-2
CONTROL V/V SERVO-MOTOR What happens when secondary oil pressure Pilot Valve of HPCV What happensdecreases very fastoil pressure rises when secondary ? ? decreases slowly ?Drain
d Spring side
e Valve side
Control Oil
Drain
e Valve side
Drain
Secondary Oil
Test Valve
Stop Valve Servo-Motor
Trip Oil
Solenoids (SVX)
Automatic Turbine TestSuccessfulTest Solenoids
Test Solenoid Start-up Oil
Main Trip Valve
Change-Over Valve
Aux-Start Up Control Oil Starting Device Aux Follow-up Valve Speeder Gear
Aux Second Oil
HTD Reset Solenoids Main Trip Valve
Remote Trip Solenoid Valve
Aux Trip Oil
Primary Oil
THANKS GIVING
THANKS FOR LISTENING TO AND SPARING YOUR VALUABLE TIME FOR THIS END OF SHOW PRESENTATION
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