Fuel Change Over

8/16/2019 Fuel Change Over

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SCBS iemens C onsortium Belawan PLN, Indonesia—INSTRUCTION MANUAL Belawan Combined Cycle Power Plant, Block II—Volume 2—Operating Manual

Part 1.1Section 6

OPERATING MANUAL

FOR

GAS TURBINE PLANT

(Operation of Overall Plant)

Fuel Changeover and Mixed Operation

Siemens AG - PT Boma Bisma Indra - Sobelco SA - PT Siemens Indonesia

in cooperation withAustrian Energy & Environment GmbH


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Operating Manual _aî .

SIEMENS belawan ii £ * *Gas Turbine Plant s>,atus;


Table of Contents _____ [------ - ---------------

Brief Descripti on .................................................

Changeover from Fuel Gas to Fuel Oil .............

Changeover from Fuel Oil to Fuel Gas .............

Changeover from Fuel Gas to Mixed Operation

Changeover from Fuel Oil to Mixed Operation .

Chang eover from Mixed Operation to Fuel Gas

Chang eover from Mixed Operation to Fuel Oil

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I08/95

1

2

5

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12

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SIEMENSOperating ManualVolume 2BELAWAN IIGas Turbine Plant

Section: 6Page: 1Status: 08/95

Part: 1.1


Brief Description _________ __ ________

Diffusion Mode/Premix Mode

The burner can function with natural gas either as a diffusion burner or as a premix burner. It can be operated as a diffusion burner from start up to 86 % base load when it is switched over th the premix mode forthe upper load range. This avoids the necessity to switch off any burners.

Changeover is controlled by the subloop controls "sic fuel gas hybridbumer MBP 20 EE 001" at a specified turbine outlet temperature and by a run up controller t = 20 s.

In premix operation adding of fuel oil is not allowable. First the burners must be changed to diffusion operation (load rejection) and the sic hybridburner must be switched off before fuel changeover or mixedoperation can be started.

Mixed Operation

The gas turbines can be fired both with liquid and with gaseous fuel. Any mixture ratios of gas to oil canbe steplessly adjusted at the local control station and can be implemented by the control system.

The mixture ratio is taken as the ratio of volumentric flows, determined for control engineering purposesby the ratio of the lifts of the gas and oil control valves. The lift setpoints for the two gas/oil lift controllerstogether make the total lift setpoint which is determined either by the speed/load controller or by temperature controller.

The fuel proportion is specified to the gas turbine controller and supplies a proportion (ANT) from0...100 % referred to the fuel oil.

To ensure unambiguous rations on start up, it is specified (and implemented in the control system) thatonly one fuel may be used for start up (operator panel start up gas/oil).

Mixed fuel operations is allowed in the load range between 20 % base load and peak load.


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C I P M F N ^ Volume 2 Section: 6Î C iv ic M o BELAWANII Page: 2

Gas Turbine Plant Status: 08/95

Operating Manual Part: 1.1


Chanoeover from Fuel Gas to Fuel Oil

Note:If premix operation is active, burner change over to diffusionoperation will be done by means of sic hybridburner11MBP20 EE 001 after reaching a calculated turbine outlettemperature < 460 'C .

= sgc gas turbine

= fuel preselection(for manual operation)

= pres control parameter

load oper

(step S27)released

c/o reset

MYB 01 EC 001

MBY 10 EU 011

MBY 10 EU 021

(1)= FUEL PRESELECTION FO SELECT MBY 10 EU 011

= solenoid valve fo esv— active power= fuel preselection fo

= fuel oil shutoff valves

closed>30 MWselected

closed pos

MBN 13 AA 001AMKA01 CE 911BMBY 10 EU 011

MBN 20 EU 003

(2)* FO PROPORTION SETPOINT 50% MBY 10 EU 013

= fo proportion release fo MBY 10 EU 013

(3)* PRES CONTROL PARAMETER

(load setpoint blocked)SW OVER MBY10 EU 021

Filling process of fuel oil lines

= fuel oil control valve= sol valve fg esv= fo feed/return valve= fo feed/return valve= fo return valve= fo return valve

< 2.5%openclosedclosedclosednot open

MBN 53 AA 001BMBP 13 AA001AMBN 21 AA 001MBN 22 AA 001MBN 51 AA 001MMBN 51 AA 001H

(4)

*= SLC FORWARDING PUMPS*= PRES RELIEF VLV FO INJ ECTION PUMP*= FO INJ ECTION PUMP

SWITCH ONOPENSWITCH ON

E G C 00E E 010MBN 12 AA 001AMBN 12 AP 011


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Q IF M F M Q Volume 2 Section: 6o i e i v i c m o BELAWAN II Page: 3




Chanaeover from Fuel Gas to F uel Oil

= fo injection pump running MBN 12 AP 011

(5)*= SOLENOID VALVE FO ESV*= SO L VALVE FOR ET UR N VALVE

OPENOPEN

MBN 13 AA 001AMBN 51 AA 001A

= supply line filling 20 s

(6)*= SO L VALVE FOR ET UR N VALVE CLOSE MBN 51 A A 001A

=. fuel oil esv= diff pres fuel oil return line

open


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Part: 1.1Section: 6Page: 4Status: 08/95


Chanoeover from Fuel Gas to Fuel Oil

sic forwarding pumps on EGC 00 EE 010= fo injection pump on MBN 12 AP 011= press relief vlv fo injection pump closed MBN 12 AA 001A= compr air shutoff 1/2 open M BL11 EU 001= active power > 8MW MKA01 CE911B= mixed operation active MBY 10 EU 003= fuel oil esv closed MBN 13 AA001C= press leak oil < max MBN 20 CP 001= flame on MBM 00 EU 010

(9) A —FO FEED/RETURN VLV

OPEN MBN 21 AA 001* — FO FEED/RETURN VLV OPEN MBN 22 AA 001

_ fo feed/return vlv open MBN 21 AA 001= fo feed/return vlv open MBN 22 AA 001

(10)lit _ SOLENOID VALVE FO ESV OPEN MBN 13 AA 001A*_ SOL VALVE FO RETURN VALVE OPEN MBN 51 AA 001A

= fo proportion released MBY 10 EU 013

(11) * FO PROPORTION SETPOINT 100% FO MBY 10 EU 013

= fuel gas control valve closed MBP 13 AA002

(12)* — SOLENOID VALVE FG ESV CLOSE MBP 13 AA 001A* —— FG VALVE DIFF BURNER CLOSE MBP 21 AA 001"k — FG VALVE DIFF BURNER CLOSE MBP 22 AA 001"k _ . FG LINE VENT VALVE OPEN MBP 14 AA001

solenoid valve fg esv closed MBP 13 AA 001A= fuel gas shutoff valves closed pos MBP 20 EU 010

(13)★ PRES CONTROL PARAMETER RESET MBY 10 EU 021

(load setpoint released)

Gas turbine in fuel oil operation.


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r __________________________________________________________________________________________________________________ — ______ _______


Chanaeover from Fuel Oil to Fuel Gas

= sgc gas turbine

=f fuel preselection(for manual operation)

= pres control parameter

load oper(step S27)released

c/o reset

MYB 01 EC001

MBY 10 EU 011

MBY 10 EU 021

(1)= FUEL PRESELECTION FG SELECT MBY 10 EU 011

= activ power= pres fuel gas upstream filter= fuel preselection fg= fuel gas esv= fuel gas shutoff valves

> 30MW> minselectedclosedclosed pos

MKA01 CE911BMBP 11 CP 001MBY 10 EU 011MBP 13 AA001CMBP 20 EU 010


= fo proportion release fg MBY 10 EU 011

(3)* PRES CONTROL PARAMETER

(load setpoint blocked)SW OVER MBY 10 EU 021

(4)sgc start up program return to step S12

*= FG VALVE DIFF BURNER*= FG VALVE DIFF BURNER*= FG LINE VENT VALVE

OPENOPENCLOSE

MBP 21 AA 001MBP 22 AA 001MBP 14 AA001

= fg valve diff burner= fg valve diff burner= fg line vent valve= flame

openopencloseon

MBP 21 AA 001MBP 22 AA 001MBP 14 AA001MBM 00 EU 010

(5)*= SOLENOID VALVE FG ESV OPEN MBP 13 AA 001A


(6)* FO PROPORTION SETPOINT 0 % FO MBY 10EU013


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Part: 1-1Section: 6Page: 6Status: 08/95


Changeover from Fuel Oil to Fuel Gas

= fuel oil control valve open MBN 53 AA 001(7)

*= SOLENOID VALVE FO ESV CLOSE MBN 13 AA 001A*= SOL VALVE FOR ETURN VALVE CLOSE MBN 51 AA 001A*= FO FEED/RETURN VALVE CLOSE MBN 21 AA 001*= FO FEED/RETURN VALVE CLOSE MBN 22 AA 001

= sol valve fo esv closed MBN 13 AA 001A

(8)*= FO INJ ECTION PUMP SWITCH OFF MBN 12 AP 011

= solenoid valve fo esv closed MBN 13 AA 001A= sol valve fo return valve closed MBN 51 AA 001A= fo feed/return valve closed MBN 21 AA 001= fo feed/return valve closed MBN 22 AA 001

(9)* PRE S CONTROL PARAMETER RESET MBY 10 EU 021

(load setpoint released)

Gas turbine in fuel gas operation.


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Changeover from Fuel Gas to Mixed Operation

Note:If premix operation is active, burner change over to diffusionoperation will be done by means of sic hybridburner11MBP 20 EE 001 after reaching a calculated turbine outlettemperature < 460 °C.

a)

= sgc gas turbine load oper MYB 01 EC 001

(step S27)= mixed operation released MBY 10 EU 003= pres control parameter c/o reset MBY 10 EU 021

= MIXED OPERATION SWITCH ON MBY 10 EU003

= FO PROPORTION SETPOINT ADJ USTMENT MBY 10 EU 013(2 )

Note: The minimum flow rate for each of both fuels is 20 %

of the base load flow rate for operation with thecorresponding single fuel.

= mixed operation active MBY 10 EU 003= solenoid valve fo esv closed MBN 13 AA 001A= active power > 30MW MKA01 CE 911 B


= fuel oil shutoff valves closed pos MBN 20 EU 003= fo proportion release fo MBY 10 EU 013

(4)* PRES CONTROL PARAMETER SW OVER MBY 10EU 021

(load setpoint blocked)

Filling process of fuel oil lines

= fuel oil control valve < 2.5% MBN 53 AA001B= sol valve fg esv open MBP 13 AA001A= fo feed/return valve closed MBN 21 AA 001= fo feed/return valve closed MBN 22 AA 001= fo return valve closed MBN 51 AA 001M= fo return valve not open

MBN 51 AA 001Hm*= SLC FORWARDING PUMPS SWITCH ON EGC 00 EU 010*= PRES RELIEF VLV FO INJ ECTION PUMP OPEN MBN 12 AA 001A*= FO INJ ECTION PUMP SWITCH ON MBN 12 AP 011


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clE Tiv/iP MQ Volume 2 Section: 6SIEMENS BELAWAN II Page: 8


Operating Manual Part: 1-1


Chanaeover from Fuel Gas to Mixed ODeration

= fo injection pump running MBN 12 AP 011

(6)* =★ _

SOLENOID VALVE FO ESVSOL VALVE FO RETURN VALVE

OPENOPEN


= supply line filling 20 s

(7)★ _ SOL VALVE FO RETURN VALVE CLOSE MBN 51 AA 001A

= fuel oil esvdiff pres fuel oil return line

open


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S I E M E N S Volume 2 Section: 6BELAWANII Page: 9Gas Turbine Plant Status: 08/95



Chanaeover from Fuel Gas to Mixed Operation

= sic forwarding pumps= fo injection pump= press relief vlv fo injection pump

ononclosed

EGC 00 EE 010MBN 12 AP 011MBN 12 AA 001A

= compr air shutoff 1/2= active power= mixed operation= fuel oil esv

open> 8MWactiveclosed

MBL 11 EU 001MKA01 CE911BMBY 10 EU 003MBN 13 AA001C

= press leak oil= flame < maxon MBN 20 CP 001MBM 00 EU 010

(10)*= FO FEED/RETURN VLV*= FO FEED/RETURN VLV

OPENOPEN

MBN 21 AA 001MBN 22 AA 001

= fo feed/return vlv= fo feed/return vlv

openopen

MBN 21 AA 001MBN 22 AA 001

11)*= SOLENOID VALVE FO ESV*= SOL VALVE FO RETURN VALVE OPENOPEN MBN 13 AA 001AMBN 51 AA 001A


12)* FO PROPORTION SETPOINT % FO/% FG MBY 10 EU 013

= solenoid valve fo esv= sol valve fo return valve

openopen


3)* PRES CONTROL PARAMETER

(load setpoint released)RESET MBY 10 EU 021

Gas turbine in mixed operation fg/fo.


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Operating Manual GT21 part: t/jSIEMENS Volume 2 Section: 6■ BELAWAN II Page: 10



Changeover from Fuel Oil to Mixed Operation

= sgc gas turbine load oper MYB01 EC 001(step S27)

= mixed operation released MBY 10 EU 003= pres control parameter released MBY 10 EU 021

(1 )= MIXED OPERATION SWITCH ON MBY 10 EU 003

(2)= FO PROPORTION SETPOINT ADJ USTMENT MBY 10 EU 013

Note:

The minimum flow rate for each of both fuels is 20 % of the base load flow rate for operation with thecorresponding single fuel.

= mixed operation= solenoid valve fg esv= activ power= pres fuel gas upstream filter

(3)* FO PROPORTION SETPOINT

activeclosed> 30MW> min

MBY 10 EU 003MBP 13 AA001AMKA01 CE 911BMBP 11 CP 001

50% MBY 10 EU 013

= fo proportion release fg MBY 10 EU 013

(4)* PRES CONTROL PARAMETER SW OVER MBY 10 EU 021

(load setpoint blocked)

(5)sgc start up program return to step S12

OPEN MBP 21 AA 001OPEN MBP 22 AA 001CLOSE MBP 14 AA 001

*= FG VALVE DIFF BURNER*= FG VALVE DIFF BURNER*= FG LINE VENT VALVE

fg valve diff burner open MBP 21 AA 001fg valve diff burner open MBP 22 AA 001fg line vent valve close MBP 14 AA 001flame MBM 00 EU 010

*= SOLENOID VALVE FG ESV(6)

OPEN MBP 13 AA001A


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Operating Manual GT21Volume 2BELAWAN IIGas Turbine Plant


Changeover from Fuel Oil to Mixed Operation

= fo proportion

* FO PROPORTION SETPOINT

released


MBY 10 EU 013

% FO/% FG MBY 10 EU 013

= solenoid valve fg esv

r PRES CONTROL PARAMETER

open

RESET

MBP 13 AA 001A

MBY 10 EU 021

Gas turbine in mixed operation fo/fg.


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Operating Manual Part: 1-1Q ip iw ipM Q Volume 2 Section: 6d IC ivic iH Q BELAWAN II Page: 12



Chanaeover from Mixed Ooeration to Fuel Gas

= sgc gas turbine

= mixed operation= fuel preselection= pres control parameter

load oper(step S27)onreleasedc/o reset

MYB 01 EC 001

MBY 10 EU 003MBY 10 EU 011MBY 10 EU 021

(1)= FUEL PRESELECTION FG SELECT MBY 10 EU 011

= fuel preselection fg selected MBY 10 EU 011

(2)= MIXED OPERATION SWITCH OFF MBY 10 EU 012

(3)* FO PROPORTION SETPOINT 0 % FO MBY 10 EU 013

= fuel oil control valve open MBN 53 AA 001(4)

*= SOLENOID VALVE FO ESV CLOSE MBN 13 AA 001A*= SOLENOID VALVE FO RETURN VALVE CLOSE MBN 51 AA 001A*= FO FEED/RETURN VALVE CLOSE MBN 21 AA 001*= FO FEED/RETURN VALVE CLOSE MBN 22 AA 001

= sol valve fo esv closed MBN 13 AA 001A

(5) *=. FO INJ ECTION PUMP SWITCH OFF MBN 12 AP 011

Gas turbine in fuel gas operation.


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Part:Section: 6Page:Status: 08/95


Chanaeover from Mixed Operation to Fuel Oil

= sgc gas turbine

= mixed operation= fuel preselection= pres control parameter

load oper(step S27)onreleasedc/o reset

MYB 01 EC 001

MBY 10 EU 003MBY 10 EU 011MBY 10 EU 021

(1)= FUEL PRESELECTION FO SELECT MBY 10 EU 011

(2)= fuel preselection fo

= MIXED OPERATION

selected

SWITCH OFF

MBY 10 EU 011

MBY 10 EU 012

(3)*= FUE L OIL PROP ORTION 100% MBY 10 EU 013

= fuel gas control valve closed MBP 13 AA 002

(4)*= SOLENOID VALVE FG ESV.*■= FG VALVE DIFF BURNER*= FG VALVE DIFF BURNER*= FG LINE VENT VALVE

CLOSECLOSECLOSEOPEN

MBP 13 AA 001AMBP 21 AA 001MBP 22 AA 001MBP 14 AA001

Gas turbine in fuel operation.

Documents

Fuel Change Over