dln26
DESCRIPTION
TRANSCRIPT
DRY LOW NOX 2.6Controls Overview
Advanced Controls Development Engineering
John ColeDLN Controls Development Engineering
March 1996
© COPYRIGHT 1995 GENERAL ELECTRIC COMPANYPROPRIETARY INFORMATION - THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION OF GENERAL ELECTRICCOMPANY AND MAY NOT BE USED OR DISCLOSED TOOTHERS, EXCEPT WITH THE WRITTEN PERMISSION OFGENERAL ELECTRIC COMPANY
DLN 2.6 Design Intent Higher Firing Temperature Machines ~ 7Fa, 9EC, G, H Evolution of DLN-2 ~ Goal of reaching 9ppm NOx
Single Burning Zone, total premix combustor
What are we trying to control?... and how...
Unit load and fuel split via gas fuel staging ~ four independent gas fuel passages
Techniques:Cascaded Flow & Load Control
control valves positioned based upon flow characteristics& critical pressure drop across contol valves to achieve desired flow split & load control
combustion reference temperature TTRF1 (model of T4)flow scheduling based upon TTRF1
pm3
pm2
pm3pm2
pm3
pm1
q
q
q
q
q
q
q
q
PM2 (2 nozzles)located at crossfire tubes PM3
(3 nozzles)
PM1(1 nozzle)
Q (15 pegs)
DLN2.6 Fuel nozzle arrangement
6 Premix Burners - 5 radial burners(PM2 & PM3) are identical in design and effective area. The single center burner (PM1) is physically smaller, however the fuel nozzle effective area is identical to the outer five nozzles.Quaternary Pegs are located circumferentially around the forward combustion casing distributing fuel througheight holes per peg.
q
q
q
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DLN-2.6 GAS FUEL SYSTEM
GCV3 GAS CONTROL PM3
SRV SPEED/RATIO VALVE
GCV1 GAS CONTROL PM1
GCV2 GAS CONTROL PM2
GAS SKID
SRV
GCV4
GCV2
GCV1
GCV3
PM3 - 3 NOZ. PRE-MIX ONLY
PM2 - 2 NOZ. PRE-MIX ONLY
PM1 - 1 NOZ. PRE-MIX ONLY
Q - QUAT MANIFOLD, CASING, PRE-MIX ONLY
PM2
Q
6 BURNERS
TURBINE COMPARTMENT
BURNINGSINGLE
ZONE
PM1
PM3
GCV4 GAS CONTROL Quaternary
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DLN 2.6 Gas Fuel System
J. Conchieri
10/12/95
Reference Only
PC
FM
PM 1GASMAN.
PM 2GASMAN.
PM 3GASMAN.
QUATGASMAN.
TRIP OIL
CONTROL OIL
CONTROL OIL
MG2-196FF-1,-2,-3FT-GI-1,-2,-3
VGC-1
VGC-2
VGC-3
VGC-4
VSR-1
TE
TE
TE
TE
FM
FM
FM
FM
Y-STRAINER
RT-FG3
RT-FG2
RT-FG1
RT-FG4
65GC-1VH5-2
65GC-2VH5-3
65GC-3VH5-4
65GC-4VH5-5
TRIP OIL
90SR-1VH5-1
96GC-1,-2
96GC-3,-4
96GC-5,-6
96GC-7,-8
96SR-1,-2
MG1-1
MG1-2
MG1-3
MG1-4
20VG-1
PT
PT
PT
96FG-2A
96FG-2B
96FG-2CMG4-496FG-5D96FF-5D
MG4-396FG-5C96FF-5C
MG4-296FG-5B96FF-5B
MG4-196FG-5A96FF-5A
PS63FG-2,-3
PT
96FG-1
GAS PURGE OIL FUEL W/STEAM INJECTIONONLY
FH8-4
FH8-3
FH8-2
FH8-1
FH7-1
TUNINGVALVE
TUNINGVALVE
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SRV GCV1
GCV4
GCV2
GCV3
GCV4 - (Quat)2.0” Fisher EAB angle body control valve0.750” stroke, linear trim, 300 lb flangeGCV1 - (PM1)3.0” Fisher EAB angle body control valve1.125” stroke, linear trim, 300 lb flange
GCV2 - (PM2)3.0” Fisher EAB angle body control valve1.125” stroke, linear trim, 300 lb flange
GCV3 - (PM3)3.0” Fisher EAB angle body control valve1.125” stroke, linear trim, 300 lb flange
Gas Control Valves -~Control unit load and flow split~Independent 2-way fisher EAB design~Hydraulically actuated, spring return closed~3 coil servo controlled~Redundant LVDT position feedback~Trip Oil activated pilot required for actuation~Class IV shutoff clasification per ANSI B16.104/FCI 70-2
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P2 pressure tap in non-turbulent flowfield
DLN 2.6 Gas Valve SkidPublic Service Company of ColoradoFt. St. Vrain Station
SRV
GCV1 GCV4 GCV2
GCV3(not shown)
GCV3
GCV2
GCV4
SRVGCV1
SRV
GCV1
GCV4
GCV2
Spark Plugsretractingunique to DLN 2.6
Flame DetectionStandard UV detectorsFour per unitnot unique to DLN 2.6
CPD MeasurementTriple redundant CPD transducers
DLN-2.6 Hardware
Flow Split DefinitionTotal Flow = (PM3/(PM2+PM3))/(PM2/(PM2+PM3)) + PM1/(PM1+PM2+PM3) + Q/Total
example base load fuel split:60/40 +16.667 + 10
PM3 flow = 60 % of PM2+PM3 flow (45% of total flow)PM2 flow = 40% of PM2+PM3 scheduled flow (30% of total flow)PM1 flow = 16.667% of PM1+PM2+PM3 scheduled flow (15% of total flow)Q flow = 10% of total fuel flow
DLN-2.6 Gas Fuel System Flow Split Schedulinge D L N 2 . 6 S p l i t S c h e d u l i n g F u e l S p l i t D e f i n i t i o n W o r k s h e e t
M o d e 1 P M 1 o n l y M o d e 5 Q P M 2 + P M 3 + Q
F X K P M M A X = 1 0 0 % S c h e d u l e 1 2 1 4 0 > T 4 > 2 0 5 0
M o d e 3 P M 1 + P M 2 F X K Q T F _ n F X K Q T S _ n n = 1 - 4
2 0 0 0 1 2 . 5
S c h e d u l e 1 P M 1 + P M 2 2 1 2 0 1 2 . 5
2 1 8 0 1 5
F X K P M 1 F _ n F X K P M 1 S _ n n = 1 - 4 2 3 5 0 1 5
1 5 0 0 2 5
1 5 5 0 2 5
2 0 5 0 5 5
2 1 5 0 5 5
F X K T S 1 1 6 1 5
F X K T S 1 D B - 6 0 M o d e 6 Q P M 1 + P M 2 + P M 3 + Q
2 1 5 S c h e d u l e 2 T 4 > 2 1 4 0
M o d e 4 P M 1 + P M 3F X K Q T F _ n F X K Q T S _ n n = 5 - 8
S c h e d u l e 2 P M 1 + P M 3 2 1 0 0 1 5
2 2 8 0 1 5
F X K P M 1 F _ n F X K P M 1 S _ n n = 5 - 8 2 3 3 0 1 0
1 8 0 0 3 0 2 4 5 0 1 0
1 9 0 0 3 0
2 1 0 0 4 0 F X K T S 4 2 2 2 02 1 5 0 4 0 F X K T S 4 D B - 5 0
F X K T S 2 2 0 0 0 S c h e d u l e 1 P M 1 + P M 2 + P M 3 + Q
F X K T S 2 D B - 6 0F X K P M 1 F _ n F X K P M 1 S _ n n = 9 - 1 2
M o d e 5 P M 2 + P M 3 2 1 0 0 5
2 2 5 0 5
S c h e d u l e 1 P M 2 + P M 3 2 3 3 0 1 1
2 4 5 0 1 1
F X K P M 3 F _ n F X K P M 3 S _ n n = 1 - 4
2 0 0 0 6 4
2 1 8 0 6 4
2 2 3 0 6 4
2 3 5 0 6 4
S c h e d u l e 2 P M 1 + P M 2 + P M 3 + Q
F X K T S 3 2 1 7 0F X K T S 1 D B - 6 0 F X K P M 3 F _ n F X K P M 3 S _ n n = 5 - 8
2 1 0 0 6 4
2 2 0 0 6 4
2 3 0 0 6 4
2 4 0 0 6 4
M O D E 1 , i s s t i l l f o r t h e s i n g l e b u r n e r , P M 1 n o z z l e .M O D E 2 , f o r t w o b u r n e r s , P M 2 n o z z l e s .M O D E 3 , f o r o n e + t w o b u r n e r s , o r P M 1 + P M 2 n o z z l e sM O D E 4 , f o r o n e + t h r e e b u r n e r s , o r P M 1 + P M 3 n o z z l e sM O D E 5 , f o r t w o + t h r e e b u r n e r s , o r P M 2 + P M 3 , n o z z l e s
Q u a t S c h e d u l e # 1
5
1 0
1 5
2 0
2 0 0 0 2 1 0 0 2 2 0 0 2 3 0 0
T T R F 1
% Quat
Q u a t S c h e d u l e # 2
5
1 0
1 5
2 0
2 1 0 0 2 1 5 0 2 2 0 0 2 2 5 0 2 3 0 0 2 3 5 0 2 4 0 0 2 4 5 0
T T R F 1
% Quat
P M 1 S c h e d u l e # 1
2 0
2 5
3 0
3 5
4 0
4 5
5 0
5 5
6 0
1 5 0 0 1 6 0 0 1 7 0 0 1 8 0 0 1 9 0 0 2 0 0 0 2 1 0 0T T R F 1
PM1/(PM1
+PM2+PM3
)
P M 1 S c h e d u l e # 2
2 5
3 0
3 5
4 0
4 5
5 0
1 8 0 0 1 8 5 0 1 9 0 0 1 9 5 0 2 0 0 0 2 0 5 0 2 1 0 0 2 1 5 0
T T R F 1
PM1/(PM1
+PM2+PM3
)
P M 1 S c h e d u l e # 3
0
5
1 0
1 5
2 0
2 1 0 0 2 1 5 0 2 2 0 0 2 2 5 0 2 3 0 0 2 3 5 0 2 4 0 0 2 4 5 0
T T R F 1
PM1/(PM1
+PM2+PM3
)
P M 3 / 2 S c h e d u l e # 1
5 0
5 5
6 0
6 5
7 0
2 0 0 0 2 1 0 0 2 2 0 0 2 3 0 0
T T R F 1
PM3/(PM2
+PM3)
P M 3 / 2 S c h e d u l e # 2
5 0
5 5
6 0
6 5
7 0
2 1 0 0 2 2 0 0 2 3 0 0 2 4 0 0
T T R F 1
PM3/(PM2
+PM3)
F l o w S p l i t D e f i n i t i o nT o t a l F l o w = ( P M 3 / ( P M 2 + P M 3 ) ) / ( P M 2 / ( P M 2 + P M 3 ) ) + P M 1 / ( P M 1 + P M 2 + P M 3 ) + Q / T o t a l
e x a m p l e b a s e l o a d f u e l s p l i t :6 0 / 4 0 + 1 6 . 6 6 7 + 1 0
P M 3 f l o w = 6 0 % o f P M 2 + P M 3 f l o w ( 4 5 % o f t o t a l f l o w )P M 2 f l o w = 4 0 % o f P M 2 + P M 3 s c h e d u l e d f l o w ( 3 0 % o f t o t a l f l o w )P M 1 f l o w = 1 6 . 6 6 7 % o f P M 1 + P M 2 + P M 3 s c h e d u l e d f l o w ( 1 5 % o f t o t a l f l o w )Q f l o w = 1 0 % o f t o t a l f u e l f l o w
DLN-2.6 MODES OF FUEL STAGING
PM1 ~ MODE 1
PM2 ~ MODE 2
PM1+PM2 ~ MODE 3
PM1+PM3 ~ MODE 4
PM2+PM3 ~ MODE 5
PM2+PM3+Q ~ MODE 5Q
PM1+PM2+PM3+Q ~ MODE 6Q
PM1+PM2
PM1
DLN-2.6 TYPICALLOADING SEQUENCE
START
PM1+PM3
PM1+PM2
PM2+PM3+Q
PM1+PM2+PM3+Q
(firing and initial crossfire)
PM2+PM3
PM2 (Complete crossfire to 95 % speed)
(95 % speed to TTRF1 switch #1)
(TTRF1 switch #1 to #2)
(TTRF1 switch #2 to #3)
(TTRF1 switch #3, brief duration)
(TTRF1 switch #3 + a time delay to #4)
(Above TTRF1 switch #4 to base load)
0
20
40
60
80
100
120
140
23:42.7 26:35.5 29:28.3 32:21.1 35:13.9 38:06.7
time
DWATT
FSGPM1
FSGPM2
FSGPM3
FSGQ
DLN-2.6 typical valve action ~ auto load to base load
0
50
100
150
200
250
300
350
400
22:33.6 25:26.4 28:19.2 31:12.0 34:04.8 36:57.6 39:50.4time
FPGAPM1
FPGAPM2
FPGAPM3
FPG2
DWATT
typical gas pressures ~ auto load to base
gas pressure (PSI)
Dwatt (MWatt)% valve stroke
QMODES=
DLN-2.6 GAS FUEL SYSTEM
GAS SKID
Q
PM1
PM3
TURBINE COMPARTMENT
PM1 + PM2 + PM3 + Q
SRV GCV4
GCV2
GCV1
GCV3
PM2
Typical Base load operation for the DLN2.6 Combustion System
e Proprietary Information john cole 1996
BREAKEROPENEVENT
UNIT FLAME-OUT
DLN-2.6 TYPICALUN-LOADING SEQUENCE
STOP
PM1+PM3
PM1+PM2
PM2+PM3+Q
PM1+PM2+PM3+Q
PM1
PM1+PM2
(FSNL operating mode)
DLN-2.6 typical valve action ~ auto un-load from base load
0
20
40
60
80
100
120
140
04:19.2 05:45.6 07:12.0 08:38.4 10:04.8 11:31.2 12:57.6 14:24.0 15:50.4 17:16.8 18:43.2 20:09.6
time
DWATT
FSGPM1
FSGPM2
FSGPM3
FSGQ
3/7/96
Dwatt (MWatt)% valve stroke
80
130
180
230
280
04:19.2 05:45.6 07:12.0 08:38.4 10:04.8 11:31.2 12:57.6 14:24.0 15:50.4 17:16.8 18:43.2 20:09.6
time
CPD
FPGAPM1
FPGAPM2
FPGAPM3
p2 pressure =350 psigambient pressure = 12.39 psi
pressure (psig)
typical gas pressures ~ auto un-load from base load
DLN-2.6 Operational Specificsall values are specific MS7FA at PSC, Ft. St. Vrain
Loading times :
Normal loading : Start Command to FSNL : 11:18 minStart Command to Base load : 24:26 min
Fast loading : Start Command to FSNL : 06:29 minStart Command to Base load : 10:53 min
Load transients during mode transitions :
Maximum loading transient : +-2.99 % rated load
Optimal Base Load Emissions : 8 ppm NOx7 ppm CO @15% O20 ppm unburned hydrocarbons
Dynamics : 1/2 psi pp
CombustionReference CalculationTTRF1
TTRF1 comparators
Q Output Enable
DLN2.6 Control SoftwareDLN2.6 Control Software
XFSRQT
FSRQT_FR
FSR2
Quat Flow SplitScheduling
PM1 prefill Enable
PM1 valveflow & loadscaling
PM1 servooutput
X
+
-
FSRPM1FSRPM1_FR
FSRPM
Unit Load Control
PM1 Flow SplitScheduling
PM1 Output Enable
Q prefill Enable
Q valveflow & load scaling
Quat servooutput
+
-
XFSRPM3FSRPM3_FR
FSRPM2_3
FSRPM
PM3 prefill Enable
PM3 valveflow & loadscaling
PM3 servooutput
PM3 Flow SplitScheduling
PM3 Output Enable
+
X
FSRPM2_3
PM2 prefill Enable
PM2 valveflow & loadscaling
PM2 servooutput
PM2 Flow SplitScheduling
PM2 Output Enable
FSRPM2_FR
-
FSRPM2_R
FSRPM2
GCV4
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GCV1
GCV3
GCV2
Ratectrl
Ratectrl
Ratectrl
Ratectrl
flow and load controlflow control
ALIP
TTRF1
FXKQTF1_1
FXKQTS1_14
1.0
FXKQTSCBL83TVON
XFSRQTS1 FSRQTB FSRQTC
L83QTE
QXKMIN
RATE CTRL
MAX
QXKMAXQXKMIN
QXKNR1QXKNR2L83QTFZ
QXKMINL52GXZ
RATE
FSRQT_PCT
FSRMAX
FSRQT_FR
XFSRQT
L83QTPF
FSKQTPF
FSRQT_PFALIP
FXKQTCG0
FXKQTST011
FSRQT_SSERVOOUTPUTFXKSHUT
L3GCVQE
FSRGQOUTFSRQT_FR
FSR2
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GCV4
FSGQ = position feedback
ALIPTTRF1
FXKQTF2_1
FXKQTS2_14
FSRQTS2
FSRQTA
L83PM1E
FQKCG
XFSRQT_T
ALIPTTRF1
FXKPM1F1_1
FXKPM1S1_14
1.0
FXKPM1SCBL83TVON
XFSRPM1S1 A C FSRPM1F
L83PM3E
L83PM2E L83PM3E
L83PM1E
FXKPMMAX (100%)
ALIP
TTRF1
FXKPM1F2_1
FXKPM1S2_1 4
FSRPM1S2
ZERORATE CTRL
MAX
FXKPM1MAXZERO
FXKPM1NR1FXKPM1NR2L83PM1FZ
FSRPM1FL52GXZ
RATE
FSRPM1_PCT
FSRMAX
FSRPM1_FR
X
+
-FSRQT
FSR2
FSRPM1
L83PM1PF
ZERO
FSRPM1_TALIP
FXKPM1CG0
FXKPM1ST011
FSRPM1_SSERVOOUTPUT
FXKSHUT
L3GCV1E
FSRG1OUTFSRPM1_FR
FSRPM
e Proprietary Information john cole 1996
GCV1
FSGPM1 = position feedback
ALIP
TTRF1
FXKPM1F3_1
FXKPM1S3_1 4
FSRPM1S3
L83PM2E L83PM3E
B
L83PM2E
FQKCG
XFSRPM1_PF
+
+
FSKPM1PF
Z
FSRPM1PFacmp
b
ITC
V1+ts
V
tPM1PFTC
a>ba
FSRPM1PF
reset
-1FSRPM1PFd
FSRPM1PFa
FXKPM1F (30%)
D E
L2TVXP
ALIP CC
TTRF1
FXKPM3F1_1
FXKPM3S1_14
1.0
FXKPM3SCBL83TVON
XFSRPM3S1 B FSRPM3C FSRPM3D
L83PM1E
L83PM3E
ZERO
FXKPMMAX (100%)
RATE CTRL
MAX
FXKPM3MAXZERO
FXKPM3NR1FXKPM3NR2L83PM3FZ
ZERO
RATE
FSRPM3_PCT
FSRMAX
FSRPM3_FR
X
+
-FSRPM1
FSRPM
FSRPM3
L83PM3PF
FSRPM3_PFALIP
FXKPM3CG0
FXKPM3ST011
FSRPM3_S
SERVOOUTPUT
FXKSHUT
L3GCV3E
FSRG3OUTFSRPM3_FR
FSRPM2_3
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GCV3
FSGPM3 = position feedback
ALIPTTRF1
FXKPM3F2_1
FXKPM3S2_14
L83QTE
L83PM2E
FSRPM3S2
A
FQKCG
XFSRPM3_T
L52GXZ
ZERO
+
FSKPM3PF
Z
FSRPM3PFacmp
b
ITC
V1+ts
V
tPM3PFTC
a>ba reset
FSRPM3PFd
FSRPM3PFa
+FSRPM3PF
-1
FSRPM2A
L83PM2E
FXKPMMAX (100%)
RATE CTRL
MAX
FXKPM2MAXZERO
FXKPM2NR1FXKPM2NR2L83PM2FZ
FSRPM2A
RATE
FSRPM2_PCT
FSRMAX
FSRPM2_FR
FQKCG
ALIP
FXKPM2CG
FXKPM2ST011
FSRPM2_SSERVOOUTPUTFXKSHUT
L3GCV2E
FSRG2OUT
ZERO
X
+
-FSRPM3
FSRPM2_3
FSRPM2
L83PM2PF
FSRPM2_R
FSRPM2
e Proprietary Information john cole 1996
GCV2
FSGPM2 = position feedback
FSRPM2_PFX
FSRPM2_T
L52GXZ
ZERO
FSKPM2PF
Z
FSRPM2PFacmp
b
ITC
V1+ts
V
tPM2PFTC
a>ba reset
FSRPM2PFd
FSRPM2PFa
+FSRPM2PF
-1
+
CombustionReference CalculationTTRF1
TTRF1 comparators
Q Output Enable
DLN2.6 Controls StandardsDLN2.6 Controls Standards
XFSRQT
FSRQT_FR
FSR2
Quat Flow SplitScheduling
PM1 prefillPM1 valveflow & loadscaling
PM1 servooutput
X
+
-
FSRPM1FSRPM1_FR
FSRPMPM1 Flow SplitScheduling
PM1 Output Enable
Q prefill Q valveflow & load scaling
Quat servooutput
+
-
XFSRPM3FSRPM3_FR
FSRPM2_3
FSRPM
PM3 prefillPM3 valveflow & loadscaling
PM3 servooutput
PM3 Flow SplitScheduling
PM3 Output Enable
+
X
FSRPM2_3
PM2 prefillPM2 valveflow & loadscaling
PM2 servooutput
PM2 Flow SplitScheduling
PM2 Output Enable
FSRPM2_FR
-
FSRPM2_R
FSRPM2
GCV4
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GCV1
GCV3
GCV2
Ratectrl
Ratectrl
Ratectrl
Ratectrl
flow and load controlflow control
FlowScheduling Flow
ControlLogic
T4Comparators
Rate Control
FlowControlReference
Prefills
ValveScaling ~ServoOutput
GCV Fault logic
DLN 2.6 Overview / Description DLN 2.6 Hardware DLN 2.6 Timers and Counters DLN 2.6 Loading / Start permissives & trips
UCRT