control System Functional Description(Feed Gas Compressor)

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CONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTION CONTROL SYSTEM FUNCTIONAL DESCRIPTION SOM6629548SOM6629548 SOM6629548SOM6629548

TITLE:

CONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTION

DOCUMENT CODE

SOM6629548

REVISION

4

REVISION DESCRIPTION: REVISED SH.: 1,6÷8,12÷17,22,23,26,29,36,75,83,84,86,87,91÷93 DATE 02 02 02 02----AugAugAug-Aug---12121212

APPROVED SECURITY CODE N N N N CHECKED EXECUTED SIMESIMESIMESIME

SCALE N/A N/A N/A N/A REPLACES/DERIVED FROM N/A N/A N/A N/A 1st_ISSUE 28 2828 28----SepSepSepSep---11-111111

ORIGINAL JOB 1800057 1800057 1800057 1800057---58-585858 SIZE 4 44 4 LANGUAGE A AA A

THIS DOCUMENT IS AND CONTAINS CONFIDENTIAL AND PROPRIETARY INFORMATION OF Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l. WHICH SHALL NOT BE USED OR DISCLOSED TO OTHERS, EXCEPT WITH THE WRITTEN PERMISSION OF Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l. . UNPUBLISHED WORK ©2012Nuovo Pignone S.r.l. 201220122012 Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.. . . . ALL RIGHTS RESERVED.

SHEET

1111 of of of of 94949494

AT MINA AL-AHMADI REFINERY LPG TRAIN-4 PROJECT

AS SHIPPED

Chakraborty A.

Stoppa L.

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TITLE:

CONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTIONCONTROL SYSTEM FUNCTIONAL DESCRIPTION DOCUMENT CODE

SOM6629548

REVISION

4

REVISION DESCRIPTION:

NO REVISION INTRODUCED IN THIS PAGE

PAGE MARKER N/A N/A N/A N/A SECURITY CODE N N N N ORIGINAL JOB 1800057 1800057 1800057 1800057---58-585858 SIZE 4 4 4 4 LANGUAGE A A A A THIS DOCUMENT IS AND CONTAINS CONFIDENTIAL AND PROPRIETARY INFORMATION OF Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l.Nuovo Pignone S.r.l. WHICH SHALL NOT BE USED OR DISCLOSED TO OTHERS, EXCEPT WITH THE

WRITTEN PERMISSION OF Nuovo Pignone S.r.l.Nuovo Pignone S.r.l. . UNPUBLISHED WORK ©2012Nuovo Pignone S.r.l.Nuovo Pignone S.r.l. 201220122012 Nuovo Nuovo Pignone S.r.l.Nuovo Nuovo Pignone S.r.l.Pignone S.r.l.Pignone S.r.l.. . . . ALL RIGHTS RESERVED.

SHEET 2 2 2 2 of of of of 94949494

SOM6629548

REVISION

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SHEET 3 3 3 3 of of of of 94949494 4.2.1 DEVICE SUMMARY 38 4.2.2 SOFTWARE DESCRIPTION 38

4.3 LUBE OIL HEATER 39

4.4 LUBE OIL WATER COOLER 40

4.4.1 DEVICE SUMMARY 40 4.4.2 SOFTWARE DESCRIPTION 40 4.5 CONTROL OIL 41 4.5.1 DEVICE SUMMARY 41 4.5.2 SOFTWARE DESCRIPTION 41 4.6 HYDRAULIC OIL 42 4.6.1 DEVICE SUMMARY 42 4.6.2 SOFTWARE DESCRIPTION 42 4.7 STARTING 44 4.7.1 DEVICE SUMMARY 44 4.7.2 SOFTWARE DESCRIPTION 44 4.8 HYDRAULIC RATCHETING 45 4.8.1 DEVICE SUMMARY 45 4.8.2 SOFTWARE DESCRIPTION 45

4.9 BEARING METAL TEMPERATURE 47

4.9.1 DEVICE SUMMARY 47 4.9.2 SOFTWARE DESCRIPTION 47 4.9.3 DEVICE SUMMARY 48 4.9.4 SOFTWARE DESCRIPTION 48 4.10 WHEELSPACES 49 4.10.1 DEVICE SUMMARY 49 4.10.2 SOFTWARE DESCRIPTION 49 4.11 SEISMIC VIBRATION 50 4.11.1 DEVICE SUMMARY 50 4.11.2 SOFTWARE DESCRIPTION 50

4.12 MAGNETIC SPEED PICK-UP 51

4.13 COMBUSTION CHAMBER FLAME DETECTOR 52

4.14 INTERFACES WITH BENTLY NEVADA VIBRATION MONITORING SYSTEM 53

4.14.1 DEVICE SUMMARY 53 4.14.2 SOFTWARE DESCRIPTION 53 4.14.3 DEVICE SUMMARY 54 4.14.4 SOFTWARE DESCRIPTION 54 4.15 EXHAUST TEMPERATURE 55 4.15.1 DEVICE SUMMARY 55 4.15.2 SOFTWARE DESCRIPTION 55

4.16 EXHAUST DUCT BACK PRESSURE 56

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SOM6629548

REVISION

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SHEET 4 44 4 of of of of 94949494 4.17 WATER WASH 57 4.17.1 DEVICE SUMMARY 57 4.17.2 SOFTWARE DESCRIPTION 57 4.18 VENTILATION 59 4.18.1 DEVICE SUMMARY 59 4.18.2 SOFTWARE DESCRIPTION 59

4.19 INLET AIR FILTRATION 62

4.19.1 DEVICE SUMMARY 62 4.19.2 SOFTWARE DESCRIPTION 62 4.20 FUEL GAS 63 4.20.1 DEVICE SUMMARY 63 4.20.2 SOFTWARE DESCRIPTION 64 4.21 LIQUID FUEL 66 4.21.1 DEVICE SUMMARY 66 4.21.2 SOFTWARE DESCRIPTION 66 4.22 FUEL TRANSFER 68 4.22.1 Fuel Splitter 68

4.22.2 Fuel Transfer (Liquid to Gas) 68

4.22.3 Fuel transfer (Gas to Liquid) 68

4.23 FUEL GAS BLOCK / FUEL GAS VENT VALVES 69

4.24 ATOMIZING AIR SYSTEM 70

4.25 SEAL GAS, SEAL GAS HEATER & SEAL GAS BOOSTER SYSTEM 72

4.26 STEAM INJECTION 75

5 ANTISURGE AND LOAD SHARING 78

6 FIRE FIGHTING MONITORING 79

6.1 ENCLOSURE FIRE DETECTION / FIGHTING: 79

6.2 FIRE FIGHTING DEDICATED PLC INTERFACE: 81

7 MARKVIE INTERFACES WITH OTHER SYSTEMS 82

8 CONTROL INTERFACE WITH WASTE HEAT RECOVERY UNIT CONTROL SYSTEM 92

8.1.1 INTERLOCK SIGNALS 92

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REVISION

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SHEET 5 5 5 5 of of of of 94949494

LEGEND:

L14HSX: MINIMUM OPERATING SPEED

L4: MASTER PROTECTIVE RELAY

14HR: SHAFT ZERO SPEED

L62CD: COOLDOWN END

L2TVX: IGNITION TRANSFORMER ACTIVATION

L28FDX: FLAME DETECTED

L1X: MASTER CONTROL START-UP.

SIS: SAFETY INSTRUMENTED SYSTEM (MK VIeS)

FSR: FUEL STROKE REFERENCE

DCP: DIRECT CURRENT PANEL

GENERAL NOTE:

1. Contacts for limit switches are closed when valve is actuated to corresponding switch position. 2. For signal philosophy to MCC or DCP see UNIT CONTROL SYSTEM HARDWIRED I/O LIST

(SOM6628418/3).

3. The software macro performs a position check on each valve command output transition, after a “max positioning time” if the relevant limit switch input is not verified a position mismatch Alarm is generated. Moreover the position mismatch Alarm becomes active immediately if both limit switch inputs are closed.

4. The scope of this specification is to give a functional description of its auxiliary sequences. This document does not cover the description of CORE ENGINE LOGIC FUNCTIONS. The CORE ENGINE LOGIC FUNCTIONS software section contains algorithms for combustion chambers flame detection, firing temperature calculation, speed/load regulator/protection, acceleration regulators, exhaust temperature averaging regulator and protection, inter stage pressure regulator. These algorithms shall be considered GE proprietary information and are excluded from this specification.

REFERENCE DOCUMENTS:

GE-NP DOCUMENTS

Piping & Instruments Diagram SOM5081820/1 Cause & Effect Diagram SOM6629813/3

UCS IO List SOM6628418/3

Control System & Power Supply Schematic SOM5464708/3 CCC Control System Description SOM6629507/4

Field Instrument List SOM6628002/3

Communication List SOM6629523/3

CCC Modbus List SOM6629508/4

NOTE:

• ~ Symbol indicate NOT signal operation

• Median function is used in Mark Vie logic where 2oo3 function is required

• Spread alarm for 2oo3 signals will be active as follow: if the difference between the maximum and the minimum values of the three variable becomes greater than or equal to the specified constant.

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SOM6629548

REVISION

4

SHEET 6 6 6 6 of of of of 94949494

1 START/STOP SEQUENCING

1.1

READY TO START

Figure 1 - Ready to start

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REVISION

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SHEET 7 7 7 7 of of of of 94949494

1.2 AUXILIARIES STARTING

Figure 2 - Auxiliaries starting

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SOM6629548

REVISION

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SHEET 8 8 8 8 of of of of 94949494

1.3 CRANK

Off-line water wash selection on HMI B

Turbine and Auxiliaries Sequences External Sequences Notes:-From Sh. 07 Yes C Note that if water wash is

selected ready to start and start passed conditions changes from the above described (1) Sequences Water wash system start (1) End of Sequence Aux. Ready to crank? Start process valve

positioning Customer valve sequencing start Valve sequence ended; Customer Permissive to Crank AND 3CRC Yes

-Ratchet system activation -Starting system activation

TNH Above zero speed? No

No

-Ratchet system de-activation -Solenoid valve 20HD-1 closed

Yes TNH Above Crank speed? No Yes CRANK WHRU dampers in By-Pass position? Unit in Crank 14HMX See TABLE 5 Auxiliary ready to Crank No To Sh. 09 Purge Timer Reset

GT Purge Time elapsed? WHRU Purge Done? WHRU dampers in By-Pass position? No No Yes Yes L2TV=1 No Yes No Yes WHRU CTRL GT Purge Done WHRU CTRL

WHRU Purge Sequence

WHRU CTRL

WHRU Purge Timer Elapsed

WHRU CTRL Damper Status (231-XS-253C) (231-XS-0258 RS) 4VALV (231-XS-0256) 231-XS-0955 231-XS-960 231-XS-554 or 231-XS-654

Open Hot Gas Bypass Valve Close Anti-surge Valve command to CCC Close Anti-surge valve Hot Bypass valve open command for purge

Hot Bypass valve open / close feedback (1= Open; 0 = close)

Close Anti-surge valve for Purge

Anti-surge valve open / close feedback (1= Closed; 0 = Open)

PESD

<4>

Figure 3 –Crank

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TITLE:

SOM6629548

REVISION

4

SHEET

9 9 9 9 of of of of 94949494

1.4 SEAL GAS HEATER AND BOOSTER STARTING LOGIC

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SOM6629548

REVISION

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SHEET

10 1010 10 of of of of 94949494

1.5 IGNITION AND WARM-UP

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SHEET

11 1111 11 of of of of 94949494

1.6 ACCELERATION TO OPERATIVE SPEED

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SHEET

12 1212 12 of of of of 94949494

1.7 COMPLETE SEQUENCE

Figure 7 - Complete sequence

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SHEET

13 1313 13 of of of of 94949494

1.8 TURBINE SPEED CONTROL BY DCS

Figure 8 – Turbine Speed Control by DCS

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SOM6629548

REVISION

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SHEET 14 14 14 14 of of of 94of 949494

1.9 SHUTDOWN REQUEST

Figure 9 - Shutdown request

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REVISION

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SHEET

15 1515 15 of of of of 94949494

1.10 SHUTDOWN SEQUENCE

Figure 10 - Shutdown sequence

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REVISION

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SHEET

16 1616 16 of of of of 94949494

1.11 TRIP REQUEST

Turbine and Auxiliaries

Sequences

External

Sequences

Aux Trip?

Core Engine Trip? L

End sequence See Table 9

Trip from Auxiliaries Customer ESD signal PESD CESD-1, CESD-2 To sh. 06, 17 No No No Yes Master Selector - Remote Trip from HMI? - Crank - Fire - Manual - Auto Trip sequence Customer Trip? L L YES YES To Sh.6, 17 To Sh. 6, 17 No No YES (231-XS-700A) (231-XS-700B) Process Remote Trip DCS 4CT (231-XS-0257T) <4>

Figure 11 - Trip request

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SOM6629548

REVISION

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SHEET

17 1717 17 of of of of 94949494

1.12 TRIP SEQUENCE

Figure 12 - Trip sequence

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REVISION

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SHEET

18 1818 18 of of of of 94949494

1.13 COOLDOWN SEQUENCE

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SOM6629548

REVISION

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SHEET

19 1919 19 of of of of 94949494

1.14 ONLINE WATER-WASH

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SHEET

20 2020 20 of of of of 94949494

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SHEET

21 2121 21 of of of of 94949494 Figure 15 – Offline Water-wash

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SHEET

22 2222 22 of of of of 94949494

2 STATUS DEFINITION

2.1 AUXILIARIES START READY

Table1 Ready to start from Other Systems

LOGIC SOFTWARE

TAG JOB TAG(GE TAG) DESCRIPTION SYSTEM

L33as_o

231-ZSH-5001A

Anti-surge control valve open position-ASV 1

Process (ASC) NOT l86asc 231-XS-807A (86AS) Anti-surge controller fault Process (ASC) NOT L86as1

-

Anti-surge control valve 1 position failure

Process (ASC) NOT l86ls (31-XS-808B (86LS) Master controller fault Process (MCP)

L3COMM_IO -

MKVIe IO pack communication OK

Misc-MarkVIe NOT l86ps1 231-XS-601A (86PS-1) 24Vdc Bus 1 failure Misc-PS NOT l86ps2 231-XS-601B (86PS-2) 24Vdc Bus 2 failure Misc-PS NOT l86psfg

231-XS-602 (86PS-FG)

Fire Fighting 24Vdc Bus failure

Misc-PS NOT l86psf 231-XS-603 (86PS-FIELD) Field 24Vdc Bus failure Misc-PS NOT l86ps3 231-XS-610 (86PS-3) 110Vdc Bus failure Misc-PS NOT l80x

231-XS-207 (DCP-80X)

Minimum battery voltage alarm

Misc-DCP NOT l30ra

231-XS-206A (DCP-30RA)

DCP rectifier “A” common alarm Misc-DCP NOT ldcp_bad 231-XS-208A (DCP-BD) DCP-battery “A” discharging Misc-DCP

NOT 231-XS-863 (-) <4> GROUND FAULT + Misc-DCP

NOT 231-XS-864 (-) <4> GROUND FAULT - Misc-DCP

NOT l86vmn

231-YS-402F (86VM)

Vibration monitor common fault alarm Misc- BN3500 VIB Monitor NOT l86tm 231-YS-451F (86TM) Temperature monitoring fault Misc- BN3500 TEMP Monitor NOT l86cr 231-XS-515L (86CR)

Cranking motor protective lock-out

Misc- Starting Motor

NOT l33cp_c 231-XS-144 (33CP-1) Fire fighting Inergen discharge valve closed

Fire Fighting monitor NOT l86fg 231-XS-652 SF (86FF-1) FF system fault alarm Fire Fighting

monitor NOT L71GFH_W 231-LIT-5039A/B/C (71GF-2/3/4A) OR, 231-LIT-5043A/B/C (71GF-2/3/4B)

Fuel gas scrubber level high alarm

Customer ESD

NOT L86PS_110V AC_TRVIEW

231-XS-612 A 110 Vac Bus Failure at TV server panel MISC-PS NOT L86PS_24VD C_TRVIEW 231-XS-613 A 24 Vdc Bus Failure at TV server panel MISC-PS NOT FF_NSD 231-XS-652 IF (86FF_SD) FF Input fault- Normal

shutdown

FF L3crs 231-XS-0250 RS (3CRS)

<4>

Customer ready to start DCS

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SOM6629548

REVISION

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SHEET

23 2323 23 of of of of 94949494

NOT L86FTL 231-XA 5015 (-) Liquid fuel thyristor panel fault

LF thyristor Panel NOT L27mc1n 231-XS-134 (27MC) Undervoltage from MCC MCC

NOT L49x 231-XS-135 (49X) Common overload from

MCC

MCC NOT L74x_mcc 231-XS-136 (74X-MCC) Drawer Common Alarm MCC NOT L45hsa_o 231-XS-736 (45HSA) Acc compt H2S detected

alarm

MarkVIe 231-ZSL-2055 (-) Hot Gas Bypass Valve

Close Limit Switch

MarkVIe 231-XS-554 (-) Diverter System Close MarkVIe NOT L86thy 231-UA-5209A (TH1_F) Seal Gas thyristor Panel

fault

Thy Panel

Table2 Ready to start from Auxiliaries

NOT L71QL_W 231-LIT-5086A (96QL1) Lube oil tank level low alarm Lube oil NOT l27qel

231-XS-851B (49QE) <4>

Lube oil emergency pump fault

Lube oil L26qn_W 231-TE 5088AA

(LT-OT-1)

Lube oil tank temperature normal

Lube oil NOT SIS1.L86HD - Hydraulic protective trouble Control oil NOT l49hr1a 231-XS-200O (49HR-1) Hydraulic ratchet pump

overload alarm

Hydraulic ratchet NOT L27hr1a 231-XS-200U (27HR-1) Hydraulic ratchet pump

under-voltage alarm

Hydraulic ratchet NOT L26BA 231-TE-5241A1/A2/A3

(TT-BA-2A/B/C)

Turbine compartment outlet temp high alarm

Enclosure ventilation l33ido Note1 231-ZSH-5242A (33ID-1) Turbine enclosure ventilation

inlet damper open

Enclosure ventilation l33odo1 Note1 231-ZSH-5243A

(330D-1)

Turbine enclosure ventilation outlet damper#1 open

(330D-2)

(330D-3)

Enclosure ventilation NOT L26BA_1 231-TE-5242A1/A2/A3

(TT-BA-3A/B/C)

Coupling compartment outlet temperature high alarm

Enclosure ventilation l33vg2_c 231-ZSL-5009A

(33VG-2)

Fuel gas warm-up vent valve closed

Fuel gas system NOT L63FGH_W 231-PIT-5003A (96FG-1) Fuel gas pressure high alarm Fuel gas system NOT L63FGH1_W 231-PIT-5005A1/A2/A3

(96FG-2A/B/C)

Inter-valve fuel gas pressure high

Fuel gas system l33cp 231-ZSH-5265A

(33CP-1A);

231-ZSH-5266A (33CP-1D)

Fire fighting Inergen discharge valve open

Fire Fighting skid system

NOT L33PV3_o 231-ZSH 5007 A (33PV-2)

Nozzle Purge Air Vent valve open

Fuel gas system

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SHEET 24 24 24 24 of of of 94of 949494 LOGIC SOFTWARE

NOT L33cb1o 231-ZSH 5050A (33CB-1) VAB-1 Axial Compressor Bleed valve status Open

Cooling & Sealing NOT L33cb2o 231-ZSH 5049A (33CB-2) VAB-2 Axial Compressor

Bleed valve status Open

Cooling & Sealing NOT L33ac_c 231-ZSL-5157A (33AC-1) Atomizing air cooler valve

closed

Oil water cooler

Note1:This permissive to start is enabled if “Water Wash On” function is not selected on the HMI (L43BW is false).

Table3 Ready to start from SIS

NOT l45hta2 231-AE-5242A1/2/3 (45HD-2A/B/C)

Turbine enclosure gas detected alarm

SIS NOT l45hta1 231-AE-5241A1/2/3

(45HD-1A/B/C)

Accessory comp. gas detected alarm

SIS NOT l45hfa 231-AE-5229A1/2/3

(45HF-1/2/3)

Turbine inlet air filter gas detected alarm

SIS l33dtcNote1

231-ZSL-5241(33DT)

Enclosure access door closed

SIS

NOT L86MP - Master protective lockout SIS

NOT

(L86VG-1) - Inter-valve gas unit rate

mismatch

SIS NOT

L20HDX - Fuel Gas Stop valve control

signal on safety

SIS

NOT GT_2SHAFT - GT-2 shaft selected SIS

NOT

L28FD_FLT - Flame detected without fuel

on

SIS NOT

(L86FB) - Off-skid shutoff valve position

mismatch

SIS NOT

(L86FV) - Off-skid bleed valve position

mismatch

SIS L30FORCED

_SIS - SIS forced signal detected

SIS NOT L86BT1_ALM

L86BT2_ALM L86BT3_ALM

- Turbine compart. /ambient.

Diff. Press. TX-1/2/3 fault

SIS

NOT L30LOCKED

_SIS - SIS CPU locked active

SIS l33af1c

231-ZSL-5229A (33AF-1) Turbine inlet air filter inspection. door closed

SIS NOT

231-ZSL-5219A (33ED-1) Combustion Wrapper Drain valve closed

SIS

NOT L86splc - Safety system fault signal SIS

NOT L4_sis Master Protective Signal

(1=Fuel ON)

SIS NOT L33ED4

231-ZSL-5277A1 (33ED-4) Exhaust Plenum Drain Valve VA17-6 Closed

Water wash NOT L33ED5

231-ZSL-5277A2 (33ED-5) Exhaust Plenum Drain Valve VA17-6 Closed

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REVISION

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SHEET

25 2525 25 of of of of 94949494 Note1:This permissive to start is enabled if “Water Wash On” function is not selected on the HMI (L43BW is false).

2.2 AUXILIARIES START PASSED

Table 4 Start Passed

TAG

JOB TAG(GE

TAG) DESCRIPTION SYSTEM

L3PSP Process start passed

l52qa 231-XS-100I (52QA-1)

Lube oil auxiliary pump

running Lube oil

NOT L63QA2L_W 231-PIT-5133 A1/2/3

Lube oil header pressure low alarm

Lube oil

NOT L63QAL_W 231-PIT-5091A

(96QA-1)

Lube oil pump discharge pressure low alarm

Lube oil L3QE_TEST

- Lube oil emergency pump

test passed

Lube oil NOT L63HQ1L_W 231-PIT-5114A

(96HQ-1)

Hydraulic oil pressure low

alarm Hydraulic oil

l52hq 231-XS-104I (52HQ-1)

Hydraulic oil aux pump

running Hydraulic oil

l52bt1 OR l52bt2Note2 231-XS-108I (52BA-1) OR, 231-XS-109I (52BA-2) Turbine-enclosure ventilation fan #1 running OR,

Turbine-enclosure ventilation fan #2 running

Enclosure ventilation

NOT L63BT_W

Note2

231-PDIT-5241A1/2/3 (96SV-1A/B/C)

Turbine compartment diff.

press low alarm Enclosure ventilation

NOT L63SGLA

231-PDIT-5201 A Seal Gas Inlet Balancing

Line Differential Pressure Seal Gas

Note2:This permissive to start is bypassed if “Compressor/turbine Water Wash Control” function is selected (L83BW is true).

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REVISION

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SHEET

26 2626 26 of of of of 94949494

2.3 AUXILIARIES CRANK READY

Table 5 Ready to Crank from auxiliaries

LOGIC SOFTWAR

E TAG JOB TAG(GE TAG) DESCRIPTION SYSTEM

L3PRC - Process ready to crank Process

NOT L71QL_W

231-LIT-5086A (96QL1) Lube oil tank level low

alarm Lube oil

l52qa

231-XS-100I (52QA-1) Lube oil auxiliary pump running

NOT L63QA2L_

W 231-PIT-5133 A1/2/3

Lube oil header pressure low alarm

Lube oil NOT L63QAL_W 231-PIT-5091A

(96QA-1)

Lube oil pump discharge pressure low alarm

Lube oil L26QN_W 231-TE-5088AA

(LT-OT-1) Lube oil tank temp normal Lube oil

NOT L63HQ1L_

W

231-PIT-5114A (96HQ-1)

Hydraulic oil pressure low

alarm Hydraulic oil

l52hq

231-XS-104I (52HQ-1) Hydraulic oil aux pump

running Hydraulic oil

NOT L26FGL_W

231-TE-5006AA (TG-FG-1)

Fuel gas temp low alarm Master selector in “crank” position

Fuel gas l33vg2_c

Note3 231-ZSL-5009A

(33VG-2) Fuel gas vent valve closed

Fuel gas

NOT L63FGL_W

Note3 231-PIT-5003A

(96FG-1) Fuel gas pressure low

alarm Fuel gas Off-skid gas shut-off valve open Note3 AND Off-skid gas vent valve closed Note3 (33FB-O) AND (33FV-1)

Process valve ready to crank position

Fuel gas

NOT L63NCP_W 231-PIT 5063 (96NCP-1)

Bearing cooling Air Pressure Low

L3crc 231-XS-0258 RS

(3CRC) <4> Customer ready to crank

Process

L33prc SIS1.L33FB_O

& SIS1.L33FV_C

Process valve Ready to crank Position

Process

Note3:This permissive to start is bypassed if “Compressor/turbine Water Wash Control” function is selected (L83BW is true).

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REVISION

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SHEET

27 2727 27 of of of of 94949494

2.4 AUXILIARIES FIRE READY

Table 6 Ready to Fire from auxiliaries

TAG

JOB TAG(GE

L3PRF - Process ready to fire Process

NOT L63HQ1L_W 231-PIT-5114A (96HQ-1)

Hydraulic oil pressure low alarm

Hydraulic oil

NOT L43BW - Water-wash on selected Water-wash

NOT L83BW

- Turbine/compressor water

wash control

Water-wash NOT L63FGL_W 231-PIT-5003A

(96FG-1) Fuel gas pressure low alarm Fuel gas NOT L26FGL_W 231-TE-5006AA

(TG-FG-1)

Fuel gas temperature low

alarm Fuel gas

l33vg2_c 231-ZSL-5009A

(33VG-2) Fuel gas vent valve closed

Fuel gas

NOT L63NCP_W 231-PIT 5063

(96NCP-1)

Bearing Cooling Air Pressure Low

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REVISION

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SHEET

28 2828 28 of of of of 94949494

2.5 AUXILIARIES LOAD READY

Table 7 Ready to load from auxiliaries

E TAG

JOB TAG(GE

L3PRL Process ready to load Process

NOT l52qa 231-XS-100I

(52QA-1) Lube oil aux pump running Lube oil l72qez 231-XS-851-A

(52QE-1)

Lube oil emergency pump stopped

Lube oil

NOT L52hq 231-XS-104I

(52HQ-1)

Hydraulic oil aux pump running

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SHEET

29 2929 29 of of of of 94949494

2.6 SHUTDOWN

Table 8 Shutdown from auxiliaries

E TAG

JOB TAG(GE

L94PSHD Process shut-down command Process

L63TF

231-PDIT-5231A1/2/3 (96TF-1A/B/C)

Turb inlet filter diff. press. High

vot. Shutdown logic Inlet and Filtration L30WSA4_ ALM 231-TE-5082/A1 (TT-WS1AI-1) OR 231-TE-5082/A2 (TT-WS1AI-2) OR 231-TE-5079/A1 (TT-WS1FI-1) OR 231-TE-5079/A2 (TT-WS1FI-2) OR 231-TE-5080/A1 (TT-WS2FI-1) OR 231-TE-5080/A2 (TT-WS2FI-2) OR 231-TE-5081/A1 (TT-WS2AI-1) OR 231-TE-5081/A2 (TT-WS2AI-2)

Wheel-space shutdown logic

Wheel-space

TAH-208 TAH-211 TAH-212 TAH-213

Wheel-space temperature high alarmNote4

Wheel-space

231-TE-5158/A1A/2A/3A (AAT-1A/B/C)

Atomizing air temperature high high shutdown

Atomizing air

231-TIT-5013A1/A2/A3

Liquid Fuel Temperature low low

Liquid Fuel System 231-XS-652-IF

(86FF_SD)

Fire Fighting Input fault normal shutdown

Fire Fighting System S1STPSEL 231-XS-0257 S

(1STOP) <4> Process remote Stop

DCS gthrsgds_sd

231-XS-354

GT shutdown for HRSG Shutdown & Diverter System Failure to Close

PESD

Note4: Shutdown is started if wheel-space temperature is high for 24 hours

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2.7 TRIP

Table 9 Trip from auxiliaries

231-PDIT-5204A1/2/3 Compressor primary vent

pressure (depressurized trip) Seal Gas System 231-PIT-5195A1/2/3 Nitrogen gas header pressure

low low Seal Gas System

231-PDIT-5205A1/2/3 Primary vent pressure

(depressurized trip) Seal Gas System (L26TSGLL) 231-TE-5210A1/2/3

Buffer gas Temp low low.

(depressurized trip) Seal Gas System

L4surge_1 - Surge trip ASC

L26QT 231-TE-5159A1/2/3 (LT-TH-1A/B/C)

Lube oil header temperature

high voting trip logic Lube Oil L63QTX 231-PIT-5133 A1/2/3 Lube oil pressure low voting trip

aux. logic Lube Oil

L63QVT 231-PDIT-5087A1/2/3 (96QV-1A/B/C)

Lube oil tank pressure high

voting trip logic Lube Oil L4QE_TRP Lube oil emergency pump trip

logic Lube Oil

L3SMTX - Starting motor trip logic Hydraulic

L26BT 231-TE-5241A1/2/3 (TT-BA-2A/B/C) 231-TE-5242A1/2/3 (TT-BA-3A/B/C) GT compartment internal

temperature high trip Ventilation System

L4CETRIP - Core Trip UCS

L4T_S - Cumulative safety trip to MKVIe SIS

L4T_FGS - Fuel Gas Scrubber Trip Signal DCS

(L4T) - Trip Notification from MKVIe SIS - 231-ZT-5133A1/2/3 Axial Displacement of

Compressor bearings High High BN 3500 (Vib) - 231-XT-5133A1/A2 Radial Vibration on Compressor

bearings High High BN 3500 (Vib) - 231-XT-5134A1/A2 Radial Vibration on Compressor

bearings High High BN 3500 (Vib)

-

231-TE-5139A1A/2A//3A

Thrust bearing temperature

high high BN 3500 (Temp)

-

231-TE-5140A1A/2A/3A

Thrust bearing temperature

high high BN 3500 (Temp)

231-SE-5061A1/2/3 (77NH-1÷3)

HP Shaft Speed – Safety System

Control & Protection 231-SE-5063A1/2/3

(77NL-1÷3)

LP Shaft Speed – Safety System Control & Protection 231-TE-5076A1 to 231-TE-5076A13 (1 to TT-XD-13)

Exhaust Thermocouple Control & Protection

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L28FDT

231-BE-5061A1/A2/A3/A4 (28FD-2/3/10/11)

Loss of flame detected Control & Protection

L3SFLT - Control system fault UCS (Mark Vie)

L4ATOMPU R

231-TE-5158A1A/2A/3A

Atomizing Air Cooler Discharge Temp low low

Atomizing Air Cooler L45FTT 231-XS-657 T Fire detected trip FF System

231-PDIT-5217A CE/CO Inlet Filter high high UCS (Mark VIe) 231-VE-5061A1/A2

(39V-1A/B) HP Shaft Vibration high high BN 3500 (Vib) 231-VE-5062A1/A2

(39V-2A/B) HP Shaft Vibration high high BN 3500 (Vib)

Table 10 Trip from Safety system

(5ESD-R1) Front panel ESD push button

(pressurized trip) UCS

(5ESD-R2) Front panel ESD push button

(depressurized trip) UCS L5LESD1 231-HS-5254A

(5ESD-1)

Turbo unit emergency

shutdown button (depressurized trip)

Enclosure Turbine

L5LESD2 231-HS-5253A (5ESD-2)

Turbo unit emergency

shutdown button (depressurized trip)

Enclosure Turbine

L63CO_TRP 231-PIT-5121A1/2/3 (96HG-1A/B/C)

Control oil header pressure low

voting trip logic Control Oil L4BTLOSS 231-PDIT-5241A1/2/3

(96SV-1A/B/C) Enclosure loss of ventilation trip Ventilation System (L4PV) - Depress. trip Notification from

MKVIe SIS

(L4T) - Trip Notification from MKVIe SIS

L6FGEX SIS fuel gas flow excessive trip

(only during start-up) Fuel Gas 231-SE-5061A1/2/3

(77NH-1÷3)

HP Shaft Speed – Safety System

Control & Protection 231-SE-5063A1/2/3

(77NL-1÷3)

LP Shaft Speed – Safety System Control & Protection L63ETH 231-PDIT-5067A1/A2/A3 (96EA-1A/B/C)

Exhaust Duct Back Pressure Control & Protection

L28FDT

231-BE-5061A1/A2/A3/A4 (28FD-2/3/10/11)

Loss of flame detected Control & Protection L5cesd1 231-XS-700 A

(CESD-1) Customer ESD Signal PESD

L5cesd2 231-XS-700 B

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231-AE

5241\A1/A2/A3 (45HD-1A/B/C)

Acc. Compart. Vent. Outlet Gas Detector high high

UCS (Mark VIeS)

231-AE

5242\A1/A2/A3 (45HD-2A/B/C)

Acc. Compart. Vent. Outlet Gas Detector high high

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2.8 MAINTENANCE OVERRIDE IMPLEMENTATION DESCRIPTION

Following is a functional description of the implementation for maintenance overrides required for single (1oo1) trip input devices to the MKVIe system.

Maintenance override shall be enabled by operator from HMI.

When the MKVIe receives the MOS enable signal from HMI, the MKVIe logic enables this function. The number of instruments under MOS will be transmitted to DCS via the DCS - MK VIe serial link.

The MKVIe HMI is configured with a Maintenance Override selection screen which shows all of the field devices capable of being put on override. When the MKVIe receives the MOS enable signal from HMI, a transmitter selected to be overridden can be selected on the MKVIe screen through password protection. Once the transmitter input is selected, the trip from this input will be overridden in the logic and the MKVIe shown on HMI “GT MOS ON” indication shown on the MKVIe HMI

This “GT MOS ON” indication should be maintained for the duration of the override.

The MKVIe logic includes an interlock such that only one trip input for voting function may be overridden at a time (i.e. selection of a transmitter to override when another transmitter of the same voting function is already on override shall not be possible).

While an input signal is on override, the trip function from that input will be temporarily inhibited for the duration of the maintenance activity. However, the logic should be configured to allow the alarm functionality to remain active during this time in order to allow testing of the device after maintenance and before removing the override (i.e. before return to normal service).

A MOS repeating alarm is sent from the MKVIe to DCS via the serial link once every hour, to warn the plant operations personnel that a transmitter is on override.

After confirmation that the individual device/signal is ready to be restored to normal operation, the MOS is cancelled (override is removed) by removing the MOS from the individual instrument (not by resetting the MOS switch). When the selector switch is moved to “cancel” the DCS will send a momentary “MOS Cancel” signal to MKVIe via the serial link.

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3 OPERATION MODES SELECTION

Unit Operational Mode selection shall be performed by means of a software selector on UCS HMI called MASTER SELECTOR. The following operational modes are defined:

• OFF • CRANK • FIRE • AUTO • REMOTE • MANUAL

Only one mode can be selected or set at any time. Mode selection is possible only if the relevant permissive conditions are met as indicated below.

Switching to AUTO and REMOTE is always possible; the only exception is the Off-Line Water Wash condition that locks the selector in CRANK.

Switching from/to different modes is allowed only under specific conditions (see below paragraphs for details).

OFF mode

OFF mode is automatically set upon system initialization (i.e. UCS power-up). Off Mode can only be selected by the operator when the GT has come to a complete stop.

If the master selector is in OFF mode no kind of starting sequence can be run, because the machine is not ready to start and any kind of start command is ignored.

CRANK mode

In CRANK mode the engine is allowed to complete crank phase only, reaching purge/firing speed: all other following sequencing phases can be then completed changing the Master Selector position. Switching to OFF is possible before start up is initiated.

This Master Selector position also enables OFF LINE WATER WASH selection until start up is initiated (pushing START button). In case of Off-Line Water Wash sequence activation no other following sequence can be completed: Master Selector remains locked to “Crank” position until Water Wash sequence ends as a consequence of a normal stop or trip command.

FIRE mode

In FIRE mode the ignition phase is allowed, the turbine can reach the “flame-on” status and the sequence stops to warm-up.

It is possible to switch back to CRANK only before firing and to OFF before start up is initiated.

AUTO mode

In AUTO mode the complete start-up procedure can be executed, bringing centrifugal compressor at minimum operating speed; after that load control are managed by external load set-point.

It is possible to switch back to FIRE only if warm up is not ended yet, to CRANK before firing, to OFF before start up is initiated.

REMOTE mode

REMOTE mode is equivalent to AUTO, but the start command is given by a remote system (i.e. the CMS) while the stop command can be generated both remotely and locally.

control System Functional Description(Feed Gas Compressor)

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GENERAL NOTE:

REFERENCE DOCUMENTS:

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1 START/STOP SEQUENCING

READY TO START

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1.2 AUXILIARIES STARTING

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1.3

CRANK

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