Tab 07 Startup and Shutdown Flow Chart

g _____________________________________________________________________GE Power Systems Training and Development

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SPEEDTRONICS MK V START-UP / SHUTDOWN FLOWCHART

( MS6001B / DLN1 ) ( GAS )

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Select MAIN display mode.

Message SHUTDOWN STATUS OFF ( ON COOL DOWN )

Select AUTO then EXECUTE.

 Message STARTUP STATUS AUTO ( NOT READY TO START )

Select Droop then Execute. (Default mode)

Auxiliary Check of servos ( L3ACS ). No Gas Fuel Control Faults ( L3GFLT ). No loss of GRV or GCV position feedback ( L3GRVFLT). No Gas Control ValveServo Trouble 9 L3GCVFLT ) Inter-valve pressure ( P2 ) not low ( L3GFIVP) Splitter Valve OK (L3GSVFLT) Transfer Valve OK (L3GTVFLT) On total gas ( L84TG ) Multiple starts less then 2 (L62TT2)

Start Check 0: ( L3STCK0 ). No bus under voltage ( L27BN ) or ( L27BZ ). Customer permissive to start ( L3CP ). No Inlet Guide Vane (IGV) Position / Servo Trouble ( L3IGVFLT ) [ Alarm 143 ]. No loss of position feedback ( L3IGVF1 ) {


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Start Check 1: ( L3STCK 1 ). Rotor Below Minimum Speed ( L14HM ). Lube Oil Tank Temperature Normal ( L26QN ). No Primary and Secondary Flame Detector Sensor Troubles ( L28FDSCK ). Off mode selected ( L43O ). No Hydraulic Protective Troubles ( L86HD ) [ Alarm 171 ]. No Gas Fuel Trip Oil System Pressure ( L63HG1L,2L,3L ).

Start Check 2: ( L3STCK 2). Compressor Bleed Valves Open ( L86CB ). Master Protective OK ( L4Y ). Bleed Heat System Not Operational trip ( L3BHFT ).

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Start Check 3: ( L3STCK3 ). No Vibration Start Inhibit ( L39VD3 ). ( Loss or disabling of more than 1/2 of the vibration sensors will cause this ) Compressor Discharge Press. Bias OK (L3TFLT) [ Alarm 97 ]

L4T Master protective trip logic L3SMT Starting DeviceTrip [ Alarn 123 ] Normal Shutdown ( L94X ) Below Hp Accel Speed ( L14HA ) No Starting Device Trip ( L4Z ) Cranking Motor Status ( L52CR ) Starting Device not Bog down ( L60BOG ) Below Operating Speed ( L14HSX ) Controller Cranking Motor (5051CRT) Zero Speed (L14HR) Motor Breaker OK l$CRT

L4PST Protective Status Trip Generator Differential Trip ( L86TGT ) Exhaust duct high pressure shut down ( L63ETH ) [ Alarm 152 ] Fire Protection ( L45FTX ) Low Lube Oil ( L63QTX ) [ Alarm 106 ] High Vibration. ( L39VT ) TCEA HP Accel ( L12H_ACC ) TCEA Overspeed Trip ( L12H_P ) Customer Trip (L4CT) HP Overspeed Fault Protective ( L12HFD_P ) [ Alarm 73 ] TCEA Relay Circuit Status ( L4_RLYT ) HP Overspeed Fault control input trouble ( L12HFD_C) [ Alarm 71 ] Loss HP Speed Inputs (L12H_FLT) Gas Scrubber Level ( L71GST1 )

L4PRET Pre-ignition Trip Flame Detection Control ( L28FDX ) Auxiliary Check Servos ( L3ACS ) Emergency Lube Oil Pump undervoltage ( L27QEL )

L4POST Post Ignition Trip Loss Of Flame ( L28FDT ) [ Alarm 91 ] High Exhaust Temperature Spread ( L30SPT ) [ Alarm 160 ] Exhaust Over. Temp Trip ( L86TXT ) [ Alarm 156 ] All Exhaust Thermocouples Open ( L86TFB ) [ Alarm 157 ] Comp. Bleed valve Position Trouble ( L86CBT ) Master Protective Signal ( L4 ) Flame Detection Control ( L28FDX ) Ignition Permissive ( L2TVX ) Gas Fuel Hyd. Pressure Low ( L63HGL ) High Lube Oil Pressure ( 26QT ) Electrical Turbine overspeed ( L12H ) [ Alarm 70 ] No DLN Trip ( L4DLNT )

L4IGVT IGV Control Trouble [Allarm 141 } IGV not following command (CSRV TRIP) ( L86GVT ) IGV not at min operating position (50 deg.) at operating speed ( L4IGVTX ) Master reset (L86MR1_CPB) Below Operating Speed ( L14HS )


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READY TO START ( L3RS ). Ready to Start Logic 1 ( L3RS1 ). Start Check ( L3STCK ). Ready to Start Logic 2 ( L3SR2 ). Auxiliary Check Servos ( L3ACS ). Generator breaker open ( L52GX ). < RST > Status Good ( L3VOTE_Q )..

 Message READY TO START

Select START then EXECUTE. "START" lettering changes to yellow.

MASTER PROTECTIVE SET ( L4S ). Unit below minimum speed ( 20 % ) ( L14HM ). Master Protective OK ( L4Y ) Master Protective OK ( L4SX ) Ready To Start ( L3RS ) TCEA 4 Relay Status Good ( L4_FB ) Lube Pressure OK ( L63QT ) Cooling Water Pressure OK ( l63WCL ) Start Up Permissive Passed ( L1X ) No Emergency Manual Trip Given ( L5EX ) No Control System Fault Trip ( L3SFLT ) Start Signal ( L1S ) Permissive To Link ( L1XX ) No Normal Shut Down ( L94X ) Generator Breaker OK ( L2G ) Mult Start Counter ( L62TT@ ) Cranking Motor OK ( L5051CRT ) Water Wash Off ( L83BW )

Turbine speed reference set to 100.3% ( L83PRES2 ).

 Message START SELECTED

Aux. hydraulic oil pump start Permissive ( L4HQZ ).

Master Control ( L4 ) Master protective trip ( L4T ). No Fired Shutdown ( L94T ). Master protective set ( L4S ).


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If gas fuel is selected ( L43FTG ) and on total gas ( L84TG ) the gas stop valve ( L20FGX ) is energized.

Hydraulic Ratchet begins to Turn Rotor. Cranking Motor Starts. Torque Converter fills ( L20TU1X ). Torque Converter Set for Breakaway / Purge Torque ( LPURGE ). Lube Oil Mist Eliminator Fan Start Permissive ( L4QVZ1A ).

 Message STARTING SEQ. IN PROGRESS START-UP CONTROL

Unit is "CRANKING" if Speed is above (>)0.31% speed ( L14HRZ ). No Flame Detected ( L28FD ). No startup firing fuel level ( L83SUFI ) { 0% FSR }.

Message CRANKING

IGV solenoid energized to permit IGV control ( L20TV1X ).

Gas fuel vent solenoid energized ( L20VG1X ).

Liquid Fuel Selected Gas Fuel Selected


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Turbine rotor driven by starting motor to min. speed (L14HM ) {16%/576rpm }. Purge Timer ( L2TV ) starts. Starting motor continue to turn rotor throughout purge cycle. Rotor speed increases above L14HM. At the end of the purge cycle the oil drains ( L20TU1X ) from torque converter. Turbine rotor speed decreases below 9.5% ( 342 rpm ). Torque converter set for firing torque ( LFIRE ).

After rotor speed decreases below 9.5%

speed, Torque converter fills with oil. Starting motor increases rotor speed up to 16%/576 rpm. Unit is now ready to "FIRE

Gas control valves STOP/SRV and GCV

open permissive ( L3GRV and L3GCV ). Ingition permissive ( L2TVX ). Purge timer ( L2TV ) complete. Firing timer ( L2F ) not complete ( 60 sec ). Min firing speed ( L14HM ) {16% / 576 rpm }. Neither "OFF" nor "CRANK" selected. ( L43O_C ). "WATER WASH" not selected. ( L43BWX ).


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Igniters energized. FSR set for FIRING ( L83SUFI ).16.3%

Message FIRING START-UP CONTROL

Combustion confirmed by primary flame detectors. Message FLAME # A # etc.

Unit goes to "WARM UP" if flame is detected within 60 seconds firing time ( L2W ). Confirmation of flame is by all primary flame detectors ( 28FD ).

After flame is detected: Rotor speed increases slightly during WARM-UP. FSR set for WARM-UP value ( L83SUWU ).13.8% Warm-up timer ( L2W ) { 60sec } starts.

OPERATIONAL NOTE: If Operation Selector is not Message set for AUTO the start-up will not progress beyond WARMING UP WARM-UP.

WARM-UP TIMER COMPLETE.

Torque converter set to acceleration torque

FSR increases ( ramps ) at 0.05% / sec ( FSKSU_IA ) ,increases fuel flow and rotor speed.

Message ACCELERATING

Acceleration Control assumes control of fuel flow ( decreasing FSR ) when rate of speed increase exceeds acceleration rate ( TAKLn ).

Message ACCEL. CONTROL

When turbine speed exceeds cranking speed stop setpoint ( TNK14HC1 ) { 60% / 2160 rpm }: Oil drains from Torque Converter ( L20TU1X ) to unload the Starting Motor.


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Turbine operation is self-sufficient. Rotor acceleration continues due to fuel flow.

Depending on ambient conditions and turbine speed, the Variable Inlet Guide Vanes will start to modulate to their intermediate position to maintain positive fifth stage pressure and prevent compressor stall.

At approx. 95%/3420 rpm speed ( L14HS ): Combustion monitor enabled. Exhaust frame blowers on. Aux. lube oil pump shut down. Aux. hydraulic pump shut down. Compressor bleed valves close.

Start field flashing

Start Exication ( L4EX_STRT_SS ) at L14HF ( 95%/3420 rpm ).

Complete Sequence ( L3 ) Emergency lube oil pump not running ( L72QEZ ). Aux. Hydraulic pump not running ( L52HQ ). Aux. Lube oil pump not running ( L52QA ). FSR Speed droop control ( L30FD_ND ). Above operating speed ( L14HS ). No shutdown initiated ( L94X ). Unit is at FSNL ( 100% ), ready for generator to synchronize and breaker to close. Message SPEED CONTROL

Full Speed No Load

Auto Sync Select ( L43A ( AUTO )


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Load Selection

Spinning Reserve No load selected Pre-selected ( L83PS ) Base ( L83B ) Peak ( L83P )

Auto sync permissive ( L52SX ). Breaker not closed ( L52GX ). Startup permissive ( L1X ). Complete sequence ( L3 ). Speed / Frequency match ( L60TNML / L60TNMR ). Voltage match ( L60SYNL / L60SYNR ).

Generator breaker closed

( 52G )

Message LOADING

Generator load raises automatically ( L90LR ) to the selected load point. With no load point selected, the load will be spinning reserve ( 4 mw ). To change from one selected load point to another, select the new target and execute. The manual raise ( L70R ) or manual lower ( L70L ) targets can be executed to select any desired load.

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FIRED SHUTDOWN

Turbine trips are part of the Protective Systems. These types of trips cut fuel off immediately and unit coasts down. This is different from a FIRED SHUTDOWN where fuel decreases gradually allowing rotor speed to decrease to reduce the thermal stresses.

AUTO SHUTDOWN STOP and EXECUTE ( L1STOP_CPB )

Vibration input groupe disabled ( L39VD2 ). Generator vent. trouble shut down. If 2 or more RTD's => 100 deg F at generator stator coupling end ( L94GEN ). Redundant Sensor Protection For Inlet Press ( L63TFH ) DGP Critical Self Test Failure ( L74CR ) Combustion Protection Shutdown Lockout ( L94GSDW ) Auto shutdown initiated ( L94AX ).

Normal shutdown initiated ( L94X )

Message Unloading Seq. in Progress Stop

Unit unloads to 0 mw.

Breaker opens on reverse ( L32DW ) {-3 mw} Speed reference ramps to minimum value.

At L14HS: Exhaust frame blowers shut down. Aux. lube oil pump starts. Compressor bleed valves open.


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Depending on ambient conditions and Turbine speed the Variable Inlet Guide Vanes will start to modulate closed to prevent compressor stall and negative 5th stage pressure.

Unit trips ( L94T ) 8 minutes after breaker opens ( L94XZ). ( K94XZ ) OR Loosing flame in either can ( L28FD ) and ramp to blowout detected ( L83RB ).

Turbine coast to zero speed ( L14HR ). Aux. hydraulic oil pump started. Ratchet sequence started. Normal cooldown sequence started.

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Tab 07 Startup and Shutdown Flow Chart

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Transcript of Tab 07 Startup and Shutdown Flow Chart