AUTOMATIC
AUTOMATIC
TURBINE
TURBINE
RUN UP
RUN UP
SYSTEM
SYSTEM
SGC OIL
SGC OIL
•• SGC Oil supply directly acts on theSGC Oil supply directly acts on the
following systems
following systems
1
1.. SSLLC C ttuurrnniinng g ggeeaarr 1 1.. SSLLC C AAOOP P 11 1 1.. SSLLC C AAOOP P 22 1 1.. SSLLC C EEOOPP 1 1.. SSLLC C JJOOPP •
• AOP 1 is switched on as first step toAOP 1 is switched on as first step to
provide the lubricating oil at the
provide the lubricating oil at the
required ends.
•
•
This program switches on the
This program switches on the
oil
temp
controller,
which
oil
temp
controller,
which
maintains the oil temperature
maintains the oil temperature
in the header supplying oil to
in the header supplying oil to
the bearings.
the bearings.
•
•
The controller actuates a three
The controller actuates a three
valve which thereby controlling
valve which thereby controlling
the quantity of oil being cooled
the quantity of oil being cooled
in the oil cooler and quantity of
in the oil cooler and quantity of
oil being taken directly from
oil being taken directly from
the tank to the header.
•
•
SGC oil supply also ensures
SGC oil supply also ensures
supply of motive oil to the
supply of motive oil to the
hydraulic turbine of turning
hydraulic turbine of turning
gear as the SLC turning gear is
gear as the SLC turning gear is
switched on by the SGC oil.
switched on by the SGC oil.
•
•
The jacking oil pumps are also
The jacking oil pumps are also
hooked up in SLC mode . SGC
hooked up in SLC mode . SGC
oil switches on this SLC for
oil switches on this SLC for
jacking oil system.
jacking oil system.
•
•
Shut down program of SGC oil
Shut down program of SGC oil
can only be started if HP casing
can only be started if HP casing
temperature,
both
top
and
SGC - EVACUATION
SGC - EVACUATION
•
• SGC evacuation directly acts onSGC evacuation directly acts on condensate pumps, vacuum pumps,
condensate pumps, vacuum pumps,
its SLC and its associated drives.
its SLC and its associated drives.
•
• Although SLC drains is primarilyAlthough SLC drains is primarily
hooked up with SGC Turbine, SGC hooked up with SGC Turbine, SGC evacuation also switches it on.
evacuation also switches it on.
•
• Shut down program can also beShut down program can also be
initiated by operator provided the
initiated by operator provided the
following release criteria are
following release criteria are
available
available
•
SGC
SGC
-
-
Turbine
Turbine
•
•
SGC Turbine acts directly on the
SGC Turbine acts directly on the
following systems:
following systems:
1
1
.
.
S
S
L
L
C d
C d
r
r
a
a
i
i
n
n
s
s
1
1
.
.
Wa
Wa
rm
rm
up
up
co
co
nt
nt
ro
ro
l
l
le
le
r
r
1
1
.
.
St
St
art
art
in
in
g d
g d
ev
ev
ic
ic
e o
e o
f t
f t
he
he
tu
tu
rb
rb
in
in
e
e
governing system
governing system
1
1
.
.
Sp
Sp
ee
ee
d
d
a
a
nd
nd
lo
lo
ad
ad
se
se
t
t
p
p
oi
oi
nt
nt
devices of turbine governing
devices of turbine governing
system
system
1
•
• SGC turbine execute the followingSGC turbine execute the following
tasks, when switched on by the
tasks, when switched on by the
operator at an appropriate time.
operator at an appropriate time.
The program can be made on only
The program can be made on only
after fulfilling the release criteria.
after fulfilling the release criteria.
1.
1. StSteaeam m & & mmetetal al tetemmpeperaratuturere
matching- is an important task
matching- is an important task
before admitting the steam into
before admitting the steam into
the turbine for the purpose of
the turbine for the purpose of
warming up the various elements,
warming up the various elements,
speeding and loading. Function
speeding and loading. Function
generators are used to determine
generators are used to determine
the desired level of temperature
the desired level of temperature
based on the actual metal
2
2
.
.
AT
AT
RS
RS
ac
ac
ts
ts
on
on
th
th
e w
e w
ar
ar
m-
m-
up
up
controller to ensure a safe rate
controller to ensure a safe rate
warm-up
warm-up
of
of
the
the
ESV&
ESV&
CV
CV
of
of
the
the
HP turbine as permitted by the
HP turbine as permitted by the
TSE.
TSE.
•
•
In the warm up stage, the
In the warm up stage, the
operation of the turbine drains
operation of the turbine drains
is equally important and all the
is equally important and all the
drains are hooked up in a SLC.
•
• After the warming up of ESV & CVAfter the warming up of ESV & CV
of the HP turbine, the ATRS admits
of the HP turbine, the ATRS admits
steam into the Turbine for rolling
steam into the Turbine for rolling
the turbine.
the turbine.
•
• After ensuring adequate level of After ensuring adequate level of
warming up and availability of all
warming up and availability of all
required criteria, the ATRS takes
required criteria, the ATRS takes
the turbine from barring speed to
the turbine from barring speed to
the first hold speed (Soaking
the first hold speed (Soaking
speed).
speed).
•
• During the process of raising theDuring the process of raising the
speed, the acceleration is
•
•
The ATRS ensures a definite
The ATRS ensures a definite
hold for soaking of turbine
hold for soaking of turbine
internal at this speed for a
internal at this speed for a
specific period.
specific period.
•
•
After
After
proper
proper
and
and
adequate
adequate
thermal
soaking
of
the
thermal
soaking
of
the
components, the ATRS raises
components, the ATRS raises
the speed of the TG set to rated
the speed of the TG set to rated
speed .For this period also, the
speed .For this period also, the
acceleration is controlled by
acceleration is controlled by
TSE except for the region where
•
• After attaining a speed aboveAfter attaining a speed above
2950 rpm and when sufficient
2950 rpm and when sufficient
temperature margins are
temperature margins are
available, then auto-synchroniser
available, then auto-synchroniser
takes over and matches the
takes over and matches the
turbine speed to a value matching
turbine speed to a value matching
with the grid frequency. It
with the grid frequency. It
simultaneously acts on the AVR for
simultaneously acts on the AVR for
matching the grid and generator
matching the grid and generator
voltages.
voltages.
•
• Auto-Synchroniser Auto-Synchroniser synchronisessynchronises
the TG set at the right moment
the TG set at the right moment
depending on the frequency and
depending on the frequency and
phase angle. EHG immediately
