generator auxiliary system presentation
TRANSCRIPT
STGC
Creation Beyond Imagination Shanghai Electric
Creation Beyond Imagination Shanghai Electric
STGC
GENERATOR AUXILIARY SYSTEM PRESENTATION
2×300MW DEENBAUDHU CHHOTURAM THERMAL POWER PROJECT, GUANGNING
上海电气电站设备有限公司上海发电机厂
STGC
To provide means for safely putting hydrogen in or taking hydrogen out of the generator, using carbon dioxide as a scavenging medium.
To maintain the gas pressure in the machine at the desired value.
To indicate to the operator at all times the condition of the machine with regard to gas pressure, temperature, dew point and purity.
To dry the gas and remove any water vapor which might get into the machine from the seal oil.
Supply nitrogen gas to pressurize the stator coil water tank for isolating the air.
To send the alarm signals as the liquid leakage (oil or water leakage) to inside of generator.
THE PURPOSE OF THE GAS SYSTEM
GENERATOR GAS SYSTEM
STGCGENERATOR GAS SYSTEM
H2 SYSTEM
STGC
GAS SYSTEM MAIN CHARACTERISTIC
Complete charge and vent function
Perfect operation monitoring and detecting
system
H2 pressure control automatically
Effective gas dryer
HYDROGEN SYSTEM
STGC
H2 PRESSURE CONTROL UNIT
HYDROGEN SYSTEM
Package design, convenient for operation and maintenance.
Easy for installation.Compact outline. Graphic valve identification
labels for generator purging and operation.
STGC
Thermo conductivity type
Three-range gas analyzer (CO2 in
Air; H2 in CO2; H2 in Air) Explosion-proof sensorPackaged gas sampling system
with flow meter and oil/moisture filter
Local and remote alarms
GAS ANALYZER CABINET HYDROGEN SYSTEM
STGC
H2 PURITY ANALYZER SAMPLE SYSTEM & CONNECTION
HYDROGEN SYSTEM
STGC
ADSORBABLE GAS DRYER
HYDROGEN SYSTEM
Dual tower adsorbent type dryer,
with one tower in operation and the
other in regeneration.
Two sets connect in parallel with
automatic switch function
Max flow 100 Nm3/h
Easy to use and maintain
STGC
ADSORBABLE GAS DRYER FLOW
HYDROGEN SYSTEM
STGC
Explosion-proof Design
DPDT switch
SS material
With liquid level sight glass
Special float ball compression
resistance technique
LIQUID LEAKAGE DETECTOR
HYDROGEN SYSTEM
STGC
8 points circuiting detection automaticall
y point by point
One analog 4~20mA and one DPDT logic
signal output
H2 LEAKAGE DETECTOR
HYDROGEN SYSTEM
STGC
H2 LEAKAGE DETECTOR PIPINGHYDROGEN SYSTEM
STGC
Provide sealing oil to the gland seals to prevent the escape of hydrogen gas from the generator Provide lubrication to the gland seals to prevent seal wear. Provide a means of minimizing the amount of air and moisture entering the generator. Multi-backup in air side seal oil supplies ensuring the system safe operation.
THE PURPOSE OF THE SEAL OIL SYSTEM
SEAL OIL SYSTEM
STGC
SEAL OIL SYSTEM
SEAL OIL SYSTEM
STGC
Double flow, double rings gland seal structure
Compact design, small space occupied
H2 side seal oil instead of vacuum treatment system, reduci
ng H2 wastage, high reliability
Multi-backup in air side seal oil supplies, high reliability
100% filter and cooler backups
Perfect inspection and warning system
SEAL OIL SYSTEM MAIN CHARACTERISTICS
SEAL OIL SYSTEM
STGC
Created by
Westinghouse
Reducing flow rate along
radial
Easy machining
Self-suit rotor camber,
reducing effect on rotor
vibrating
Air side floating oil
Air side oil
H2 side oil
Seal ring socket
rotor
Air side seal ring
H2 side seal ringDOUBLE FLOW DOUBLE RINGS
GLAND SEAL
SEAL OIL SYSTEM
STGC
发电机转轴中心线
DOUBLE FLOW DOUBLE RINGS GLAND SEAL PRINCIPLE
SEAL OIL SYSTEM
STGC
ss
SEAL OIL SYSTEM
SEAL OIL SUPPLY UNIT
STGC
1 seal oil ring
2 main DP regulator
3 main AC pump
4 DC backup pump
5 air side loop seal tank
6 Backup DP regulator
7 backup AC pump
8 turbine main oil pump
9 AC lub. oil pump
10 DC lub. oil pump
11 main oil reservoir
1 1
23
4
5
67
8
9
10
11
AIR SIDE SEAL OIL SUPPLY AND BACKUP
SEAL OIL SYSTEM
STGC
Main AC pump Turbine main oil pump
Backup AC pump
DC backup pump
HP backup oil
LP backup oil
DC lub. oil pump
AC lub. oil pump
1 2 3 4
56
AIR SIDE SEAL OIL SUPPLY AND BACKUP
SEAL OIL SYSTEM
STGC
AIR SIDE SEAL OIL BACKUP OIL SUPPLY LOGIC DIAGRAM
SEAL OIL SYSTEM
STGC
Three screws pump, low
friction, long period operation
Small pressure wave, low noise
With high suck capability
Fit relief valve
Mechanical rotor seal
SEAL OIL PUMP
SEAL OIL SYSTEM
STGC
inlet
SEAL OIL
BY PASSINLET
AIR SIDE OIL PRESS
H2 PRESS
MAIN DP REG.
BACKUP DP REG.
GLAND SEAL RING
SEAL OIL
Using pressure bellows, the li
fe is longer than diaphragm
Automatic, undisturbed switc
h from main to backup, high r
eliability
Take stuffing bellows to seal
stem, no leakage
Pressure tracking rapidly wit
h high control precision
DIFFERENTIAL PRESSURE REGULATOR
SEAL OIL SYSTEM
STGCSEAL OIL SYSTEM
MAIN DP REGULATOR SECTION
STGC
FROM H2 SIDE SEAL OIL PUMP
TO GLANDSEAL RING
H2 SIDE OIL SIGNAL
AIR SIDE OIL SIGNAL
PISTON
PISTON SPRING
UPWARD MOVEMENT OF ADJUSTING SCREW
INCREASES H2 SIDE OIL PRESSURE
POPPET
Piston regulating with high sen
sitivity
No damageable components, f
ew maintenance
Body and piston take small
temperature- sensitivity
coefficient material
Pressure tracking rapidly with h
igh control precision
PRESSURE EQUALIZING VALVES
SEAL OIL SYSTEM
STGC
Float-operated drain and
feed valves, small press
ure wave
Using magnetic level ga
uge, safety in operation
Equipped with
emergency
jackscrew
HYDROGEN SIDE DRAIN REGULATOR
SEAL OIL SYSTEM
FEED VALVE
DRAIN VALVE
TO H2 SIDE PUMP
JACKSCREW JACKSCREW
JACKSCREW JACKSCREW
STGC
Self-clean filters
Edge-type filters on line to clea
n without interrupting the oil flo
w
Easy to use, few maintenance
High filter accuracy
SS filter elements
Fit diff press switch
SEAL OIL FILTER
SEAL OIL SYSTEM
STGC
Assembly design
Multi-step oil moisture separ
ate
Explosion-proof motors
Local vacuum pressure indic
ation
GEN LOOP SEAL VAPOR EXTRACTOR
SEAL OIL SYSTEM
STGC
THE PURPOSE OF THE STATOR WATER SYSTEM
To cool stator winding and parallel rings Demineralization of the water to control its electrical conductivity Provide instrumentation to monitor flows, pressures, temperatures, and conditions of conductivity of the demineralized water Automatic makeup water, pressurized water tank with N2 gas 100% standby for cooler and filter Valves for reverse flushing are furnished for more efficient cleaning stator coils
All piping and components are made of corrosion resistant materials
STATOR COIL COOLING WATER SYSTEM
STGC
WATER SYSTEMWATER SYSTEM
STATOR COIL COOLING WATER SYSTEM
STGC
WATER SYSTEM FLOW
STATOR COIL COOLING WATER SYSTEM
Flow Meter
Filter Cooler
Gas meter
Nitrogen Fill System
Makeup Water Supply
Demineralizer Conductivity
Meter
Water Pump
Conductivity Meter
Water Tanker
Generator
STGC
STATOR COOLING WATER SUPPLY UNIT
STATOR COIL COOLING WATER SYSTEM
STGC
Workshop prefabrication
With temp measuring
elements and switches, easy
to install
With reverse flushing for more
efficient cleaning stator coils
Equipped with strainer at
winding inlet
Piping prefabrication
strainer
WATER SYSTEM GEN INLET AND OUTLET PIPING
STATOR COIL COOLING WATER SYSTEM
STGC
Centrifugal type
SS material
Rotor with mechanical seal
Need not move pump body
and piping to maintenance
STATOR WATER PUMP
STATOR COIL COOLING WATER SYSTEM
STGC
Design and manufacture according to
pressure vessel
Equipped with multi-level switch (H, L,
LL) to monitor and control water level
Equipped with strainer at water outlet
Using magnetic level gauge, safety in
operation
Equipped with vapor heater
WATER TANK
STATOR COIL COOLING WATER SYSTEM
STGC
Fabric filter elements, no fibre to
fall off
High filter accuracy
Easy to change filter elements
Equipped with vent, drain and dif
f press signal connection
WATER FILTER
STATOR COIL COOLING WATER SYSTEM
STGC
TUBE
WATER FLOW
High effect tube plate cooler
SS material both tube & shell
Screwing tube
No traverse baffle, no dirty
deposit trap
Drain and vent both on Shell
side and tube side
bundle
WATER COOLER
STATOR COIL COOLING WATER SYSTEM
STGC
Bypass, mixed bed type
SS cap strainer
0.1~0.4μs/cm after treatment
Equipped with conductivity
meter
DEMINERALIZER
STATOR COIL COOLING WATER SYSTEM
STGC
A
AB
B
→
←
↓
↑
WATER INLET
WATER RETURN
STATOR WINDING REVERSE FLUSHING
STATOR COIL COOLING WATER SYSTEM
WATER INLET
WATER RETURN
STRAINER
STGC
WATER TANK
RELIEF VALVE
PRESSURE SWITCH
GAS METER
VENT TO ATMOSPGERE
High sensitive gas meter,
digital indicating easy to
use
Pressure switch to alarm
over pressurization
STATOR WINDING LEAKAGE DETECT SYSTEM
STATOR COIL COOLING WATER SYSTEM
STGC
Creation Beyond Imagination Shanghai Electric
Questions &
Answer