T A
KWU GOVERNING SYSTEM BASICS OF GOVERNING SYSTEM DRAWINGS DRAWINGS ARE NOT AS PER PE R ACTUAL THIS PRESENTATION HAS BEEN PREPARED JUST FOR UNDERSTANDING THE SYSTEM
A
HP TURBINE
IP TURBINE
LP TURBINE
TG SET
MS
CRH NRV
HPSV
IPSV
HPCV
IPCV
HPCV CRH NRV
HPSV
GENERATOR
IPCV IPSV
MS
HRH
Condenser BOILER
$pening S'
GE.E(-L SCEME
$pening C'
Steam %rom boi&er
Turbine (o&&ing
Turbine/nit Lo!"# $ut Tripping
S)n!*roni+ation ,e#a!!e&eration -!!e&eration Tripping
12MW 120MW 100MW $MW 80MW 2900 rpm 3000rpm !r"# !1r"# 3000RPM
Steam to turbine
80MW 100MW 120MW
Generating Station
Turbine
Load Consumer
Generator Speed 3150
3100
3000
2900
2850
1500
180
Different oils, their colour codes, sources and purpose in KWU Governing System S.No 1.
. 3. . #. 2. .
Name of Oil
Control Control Oil
rip Oil Au, rip Oil Start!up Oil Au, Start!up Oil Au, SecondarOil Secondar- Oil
Source & pressure MOP/AOP ( !".# $%/cm'
Purpose o esta)lis* rip Oil+ Au, rip Oil+ rip Oil+ Start!up Oil+ Au, Start!up Oil+ Au, Secondar- Oil+ SecondarOil+ Primar- Oil+ tc Main rip ale (."!2 $%/cm ' o reset + Open & rip stop ale Main rip ale (."!2 $%/cm'
o trip -draulic rip 4eice
Startin% 4eice ( #.# $%/cm '
o assist 5esettin% & Openin% Stop ales o 5eset Main rip ale & -draulic rip 4eice
Startin% 4eice ( #.# $%/cm ' Speeder 6ear ( .3!." $%/cm'
7nput Si%nal to -draulic -draulic Conerter
-d/lectro!-d Conerter ( 0!2 $%/cm'
o %oern P/7P Control ale openin%
Primar- Oil Pump ( 0!.3 $%/cm'
8eed)ac9 speed speed si%nal for 6
Oer Speed est 4eice ( .0 $%/cm'
o test Oer Speed est 4eice
(P/7P' ".
Primar- Oil
:.
est Oil 10.
4rains
LEGENDS Colour Code
CONTROL OIL OIL TA%EN FROM AOP&MOP DISCHARGE HEADER FOR THE GOVERNING SYSTEM
TRIP&AU' TRIP OIL THESE TWO OIL CIRCUITS ARE ESTABLISHED THROUGH MAIN TRIP VALVES UNDER RESET CONDITION(
START)UP&AU' START)UP OIL THESE TWO OIL CIRCUITS ARE ESTABLISHED TO ITS PEA% PRESSURE THROUGH STARTING DEVICE AT * POSITION AND PRESSURE STARTS REDUCING WHEN POSITION OF THE STARTING DEVICE IS RAISED(
AU' SECONDARY OIL THIS OIL CIRCUIT IS NOTHING BUT OUTPUT OF HYDRAULIC GOVERNOR AND INPUT TO HYDRAULIC CONVERTER(
SECONDARY OIL CONVERTER(
TEST OIL THIS OIL CIRCUIT IS ESTABLISHED TO TEST OVER SPEED TRIP DEVICE WHEN TURBINE IS RUNNING AT RATED SPEED(
OUTPUT
OF
HYDRAULIC&ELECTRO)HYDRAULIC
REMOTE TRIP SOLENOID VALVES THESE 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 VALVES THESE ARE TWO IN Nos( AND CALLED THE MAIN TRIP GEAR( ALL THE TURBINE TRIPPINGS TA%E PLACE THROUGH THIS DEVICE( UNDER NON)TRIP CONDITION ESTABLISHES TRIP , AU' 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 CONVERTER AMPLIFIES,CONVERTS HYDRAULIC &ELECTRICAL SIGNALS TO HYDRAULIC SIGNALS - HP&IP SECONDARY OIL. FOR THE OPERATION OF HP&IP CONTROL VALVE(
HYDRAULIC TRIP DEVICES THESE DEVICES PROVIDE MANDATORY PROTECTIONS OF THE TURBINE BY DRAINING AU' TRIP OIL( THESE DEVICES ARE RESET BY AU' START) UP OIL(
TEST V&V
STOP V&V SERVO MOTOR
L$C ,-G(-M $ G$'E(..G S4STEM F/45ered Con5ro4 O/4
M/n Tr/" V46es
Re#o5e Tr/" So4eno/d V46es
STOP , CONTROL VALVE
AOP
CONTROL VALVE SERVO MOTOR
4 / O " / r T
F/45er
MOP
Se0ondr7 O/4 AOP D/s0r3e eder
" / r 4 T / 9 O 8 A
A89 S5r5)8" O/4
S5r5)8" O/4
C o n H 6 7 e d r 5 e r
S5r5/n3 De6/0e
F/45ered Con5ro44ed O/4
H7d( Tr/" De6/0e
E C 4 o e 0 n 5 r 6 o e ) r H 5 e 7 r d
RAISING STARTING DEVICE POSITION TO DE)PRESSURISE BRINGING THE STARTING TO :;STOP POSITION TOAND BUILD START)UP , AU' STATR)UPDEVICE OIL TO OPEN VALVES START)UP ,PRODUCING AU' STATR)UP OIL TO RESET STOP, MAIN TRIP AU' SECONDARY OIL VALVES AND HYD( TRIP DEVICE Hand Wheel
Motor
Dr/n
STARTING DEVICE
-<(< A89 S5r5)8" O/4 - %3&0#2. %3&0#2.
TO MTV , HTD V&V CONTROL OIL FROM AOP&MOP
TO TEST V&V OF STOP V&V S5r5)8" O/4 - -<(< %3&0#2. %3&0#2.
Dr/n
=<
1
< 2<
S5r5/n3 De6/0e In *
STARTING DEVICE
RESETTING OF MTV FOR TRIPPING OF MTV FOR ESTABLISHING TRIP&AU' %ILLING TRIPTRIP OIL OIL
MAIN TRIP VALVE
,(-.
57P O7; O 5S/OPN SOP A; & 8O;;OW!
SCON4A5> O7;O7; (."!2.0 (0 $%/cm' $%/cm'
CON5O; O7; 85OM AOP/MOP(2!".# $%/cm'
A<= 57P O7; O >45A<;7C 57P 47CS (."!2.0 (0 $%/cm' $%/cm'
- ST-(T#6 $L ($M ST-(T.G
RESETTING OF MTV
REMOTE TRIP SOLENOID OPERATED VALVES TRIP OIL TO HOLD STOP V/V’S & AND TO PRODUCE SECONDARY OIL
AUX START-UP OIL TO RESET MTV & HTD
CONTROL OIL FROM AOP&MOP
,(-.
Filter
$ 6 , i s * a r g e * e a d e r
AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES
-$6/ M$6
T(66.G $ MT' T($G (TS' 7ELECT(C-L:
TRIPPING THROUGH RTSV
REMOTE TRIP SOLENOID OPERATED VALVES TRIP OIL TO HOLD STOP V/V’S & AND TO PRODUCE SECONDARY OIL
AUX START-UP OIL TO RESET MTV
CONTROL OIL FROM AOP&MOP Filter
,(-.
AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES
TRIPPING THROUGH HYD TRIPDEVICE
T(66.G $ MT' T($G 4,(-LC T(6 ,E'CE 7MEC-.C-L:
REMOTE TRIP SOLENOID OPERATED VALVES TRIP OIL TO HOLD STOP V/V’S & AND TO PRODUCE SECONDARY OIL
CONTROL OIL FROM AOP&MOP Filter
,(-.
AUX START-UP OIL TO RESET HYD TRIP DEVICES
AUX START-UP OIL TO RESET MTV
AUX TRIP OIL TO HYDRAULIC TRIPING DEVICES
4,(-LC T(6 ,E'CE AUX TRIP OIL TO THE HYDRAULIC TRIPING DEVICES
(ESETT.G $ (TS'; 4,< T(6 ,E'CES = MT' T($G
(ESETT.G $ (TS'; 4,< T(6 ,E'CES = MT' T($G REMOTE TRIP SOLENOID OPERATED VALVES
TRIP OIL TO HOLD STOP V/V’S & AND TO PRODUCE SECONDARY OIL
AUX START-UP OIL TO RESET MTV
CONTROL OIL FROM AOP&MOP Filter
,(-.
AUX START-UP OIL TO RESET HYDRAULIC TRIP DEVICES
4,(-LC T(6 ,E'CE AUX TRIP OIL TO THE HYDRAULIC TRIPING DEVICES
STOP V/V OPERATION TEST VALVE
START)UP OIL TO TEST V&V
TRIP OIL TO STOP V&V
MTV
RTSV?S
F/45er
DRAIN
P U ) V T T R M A O T T S ' L I U O A
S&D
STOP VALVE SERVO) MOTOR
AU' START)UP OIL TO HYD TRIP DEVICE HYD TRIP DEVICE AU' TRIP OIL TO HYD TRIP DEVICE
OPENING OF STOP VALVES BY RAISING RESETTING OF RTSV-DE)ENERGI>ING. , STARTING DEVICE
STOP VALVE SERVO)MOTOR
RESETTING/OPENING/TRIPPING OF STOP VALVE
TRIP OIL ABOVE PISTON CYLINDER SPRING
Dr/n
PISTON SPRING DISC
TRIP OIL BELOW PISTON DISC
PISTON DISC
T(66.G
TURBINE OVERSPEED TRIP DEVICE AU' START)UP OIL TO RESET AU' TRIP OIL
FLY BOTL Dr/n
-u> Trip $i&
T(.E $'E(S6EE, T(6 ,E'CE
THRUST BEARING TRIP DEVICE AU' START)UP OIL TO RESET
AU' TRIP OIL
TURBINE SHAFT
S O7;
RESETTING OFTr8s5 Tr8s5Ber/n3 Ber/n3 TRIPPING OF TRIP DEVICE
Dr/n
Rese55/n3 O@ Lo V088# Tr/" De6/0e
Lo V088# Tr/" De6/0e
Tr/""/n3 O@ Lo V088# Tr/" De6/0e
V088# A5#os"ere
Dr/n Con5ro4 O/4 A89 Tr/" O/4 Dr/n
L$W '-CM T(6 ,E'CE
HYDRAULIC GOVERNOR
-u> o&&oB#up 6iston
Starting ,eAi!e
Speeder Gear -u> Se!ondar) $i& To )d< GoAernor
?5
100
50 Tr/" O/4 Fro# MTV
25
S"eeder Ger
n @
0
?5
A89 Fo44o)8" V46e
50 Con5ro4 O/4
S5r5/n3 De6/0e
L/n
Pr/#r7 O/4 -)2(!%3&0#2. S"eeder Ger
25
S5r5/n3 De6/0e
n @
0 Pr/#r7 O/4 P8#"
100
-u> o&&oB#up 6iston
Starting ,eAi!e
-u> Se!ondar) $i& To )d< GoAernor
Speeder Gear
S5r5)8" o/4
?5
100
50 25
Con5ro4 o/4
Starting ,eAi!e n @
0 A89 S5r5)8" o/4
?5 50 Pr/#r7 O/4
L.
6rimar) $i& 6ump
25
n @
0
Trip oi& rom MT'
Starting ,eAi!e
100
HP Se0( O/4
HG , EHG A89 Se0 O/4 @ro# S&G
Fo44o ) 8" 646es IP Se0( O/4
H7dr84/0 Con6er5er A#"4/@/er P/s5on Tr/# De6/0e
Con5ro4 O/4
HP Se0( O/4 E4e05ro)H7dr84/0 Con6er5er
Trip $i& rom MT'
Fo44o ) 8" 646es IP Se0( O/4
)1V S8""47 @ro# ATRS Con5ro4 O/4
A#"4/@/er P/s5on Tr/# De6/0e
Trip $i& rom MT'
HG&EHG
.6T
GOVERNER OUTPUT :1*; DRAIN * OPEN OR 1* CLOSE
HYD MINM SELECTION
ORIFICE
GOVERNER OUTPUT :*; DRAIN 1* OPEN OR * CLOSE
HYDRAULIC MINIMUM SELECTION
ELECTRO)HYD GOVERNOR
HYDRAULIC GOVERNOR
,(-.#1
,(-.#2
CONTROL V&V SERVO)MOTOR
W*at *appens ?*en W*at *appens ?*en secondaroil pressure secondaroil pressure decreases erfast@ @ decreases slo?lrises @
P/4o5 V46e o@ HPCV
Dr/n
d? S"r/n3 s/de
e? V46e s/de
Dr/n
Con5ro4 O/4
e? V46e s/de
Dr/n
Se0ondr7 O/4
THAN%S GIVING
THANKS FOR LISTENING TO AND SPARING YOUR VALUABLE N4 O8 SOW TIME FOR THIS PRESENTATION
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