generator aux

Classroom Lecture Series for Steam Turbine Generator 　 TOSHIBA

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5. GENERATOR AUXILIA5. GENERATOR AUXILIARY SYSTEM AND CONTRRY SYSTEM AND CONTR

OL EQUIPMENTOL EQUIPMENT


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CONTENTSCONTENTS5.1 HYDROGEN GAS CONTROL SYSTEM5.2 SHAFT SEAL OIL SYSTEM5.3 STATOR COOLING WATER SYSTEM5.4 GENERATOR AUXILIARIES MAINTENANCE5.5 CONTROL/MONITORING EQUIPMENT FOR GENERATOR AUXILIARIES5.6 GENERATOR CONTROL/PROTECTION EQUIPMENT 5.6.1 GENERATOR PROTECTION SYSTEM 5.6.2 GENERATOR CONTROL/SYNCHRONIZING SYSTEM

CONTENTS


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5.1 HYDROGEN GAS CONTROL SYSTE5.1 HYDROGEN GAS CONTROL SYSTEMM

HYDROGEN GAS CONTROL SYSTEM


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CO2 Manifold

H2 Manifold

Machine GasPressureRegulator

Generator

ROTOR

HYDROGEN GAS CONTROL SYSTEMHYDROGEN GAS CONTROL SYSTEM

CO2 Distribution Tube

H2 Distribution Tube

H2 DetrainingSection

Gas Flow Sight

Liquid Detector

Vent H2 Gas Dryer

HYDROGEN GAS CONTROL SYSTEM


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SHAFT SEAL OIL SYSTEM

5.2 SHAFT SEAL OIL SYSTEM5.2 SHAFT SEAL OIL SYSTEM


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GENERATOR SHAFT SEALING OIL SYSTEMGENERATOR SHAFT SEALING OIL SYSTEM


VENT

VACUUM TANK

VP

RSOP

ESOP

MSOP

PRESSUREREGULATINGVALVE

GAS DRYER

FLOATTRAPAIR

DETRAININGSECTION

TO TURBINELUBRICATINGOIL FEED LINE

FROM TURBINELUBRICATINGOIL FEED LINE

VENT

CO2 MANIFOLD

H2 MANIFOLD

MACHINE GASPRESSUREREGULATOR

GENERATOR

ROTOR

SEAL OILENLARGEMENT

M


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SHAFT SEAL OIL UNITSHAFT SEAL OIL UNITRelief Valve For MSOP

Main Seal Oil Pump

Terminal Box

Vacuum Pump

Recirculation Seal Oil Pump

Reduction Gear

Emergency Seal Oil Pump

Relief Valve For ESOP

Seal Oil Gauge Panel

Oil Filter

Differential Pressure Valve

Vacuum Tank

Level SwitchLevel Gauge


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STATOR COOLING WATER SYSTEM

5.3 STATOR COOLING WATER SYSTEM5.3 STATOR COOLING WATER SYSTEM


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STATOR COOLING WATER SYSTEM STATOR COOLING WATER SYSTEM


BOTTOM BAR

TOP BAR

GENERATOR

STORAGETANK

SCWP-A

SCWP-B

COOLER-A

COOLER-B

TEMPERATURECONTROL VALVE

FILTER

PRESSURECONTROLVALVE

DEIONIZER

MAKE-UPWATER

VENT

COOLER-A

COOLER-B

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STATOR COOLING WATER UNITSTATOR COOLING WATER UNIT

Storage Tank

PressureControlValve

TemperatureControlValve

Storage TankLevel Switch

Cooling Water

Outlets

Cooling Water Inlets

SCW Coolers

Stator Cooling Water Pumps

Deionizer

Filter


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GENERATOR AUXILIARIES MAINTENANCE

5.4 GENERATOR AUXILIARIES MAINTE5.4 GENERATOR AUXILIARIES MAINTENANCENANCE


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1. Daily Gas Control System Inspection and Tests 1. Daily Gas Control System Inspection and Tests

(1) Check the differential pressure of the duplex strainer in the seal oil feed line. (2) Check the differential pressure between the machine gas and the seal oil. (3) Check the oil level in the vacuum tank and float trap.

(4) Check the liquid detector sight glasses.

(5) Check the hydrogen purity and flow meter indications.

(6) Check the operation of the seal oil vacuum pump and check for excessive accumulation of moisture.

(7) Check all the indicating instruments.



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2. Weekly Gas Control System Inspection and Tests2. Weekly Gas Control System Inspection and Tests

(1) Start and run the emergency seal oil pump. (2) Test the visual and/or audible alarm system.



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3. Three to Six Monthly Gas Control System Inspection 3. Three to Six Monthly Gas Control System Inspection and Testsand Tests

(1) Calibrate the gas analyzer.



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4. Six to Twelve Monthly Gas Control System Inspection 4. Six to Twelve Monthly Gas Control System Inspection and Testsand Tests

(1) Check the calibration and operation of all the alarm devices and/or contacts. (2) Check the calibration of all the indicating instruments.

(3) Test the hydrogen valves and the packing for leakage.



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5. Gas Control System Maintenance During Scheduled Generator5. Gas Control System Maintenance During Scheduled Generator ShutdownShutdown

(1) Drain and clean the seal oil strainer. (2) Inspect the motors.

(3) Inspect the gear and vacuum pumps.



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H2 GAS DRYERH2 GAS DRYER

P.No

1

2

3

4

5

6

7

8

9

10

11

Description

Bellows Valve

Body

Thermostat

Sheathed Heater

Desiccant

Bellows Valves

Drain Tank

Desiccant Casing

Name Plate

Control Box

Name Plate



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HYDROGEN GAS DRYER TROUBLESHOOTINGHYDROGEN GAS DRYER TROUBLESHOOTING

Symptom Potential Cause CountermeasuresHydrogen Gas Dryer Operation Feasibility

Leak of hydrogen

Abnormal rise in temperature of desiccant during regeneration operation

Temperature fails to rise even with heater switched on

Loose bolts ;

Deteriorated gasket

Maladjusted thermostat ;

Defective thermostat

Defective wiring or connections

Heater Breakdown

Retighten bolts ;

Replace gasket

Readjust thermostat after inspecting electrical wiring ;

Replace thermostat

Inspect connections,check wiring inside

Replace heater

Possible ;

Close dryer inlet and outlet valves and disconnect from gas system

As above

As above



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1. Daily Shaft Seal Oil System Inspection and Tests1. Daily Shaft Seal Oil System Inspection and Tests

(1) Check the difference between the seal oil pressure and generator hydrogen pressure. (2) Check the oil level in the vacuum tank and float trap. (3) Check the operating condition of the vacuum pump, and discharge the drain in the oil separator until the oil level reaches the normal operation level.

(4) Check all the indicating instruments.



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2. Weekly Shaft Seal Oil System Inspection and Tests2. Weekly Shaft Seal Oil System Inspection and Tests

(1) Test the start of the emergency seal oil pump. (2) Test the visual and/or audible alarm system.



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3. Three Six Monthly Shaft Seal Oil System Inspection and Tests3. Three Six Monthly Shaft Seal Oil System Inspection and Tests

(1) Change the lubricating oil in the vacuum pump and reduction gears.



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4. Six to Twelve Monthly Shaft Seal Oil System Inspection 4. Six to Twelve Monthly Shaft Seal Oil System Inspection and Testsand Tests

(1) Check the calibration and operation of all the alarm devices and/or contacts. (2) Check the calibration of all the indicating instruments.



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5. Shaft Seal Oil System Maintenance During Scheduled 5. Shaft Seal Oil System Maintenance During Scheduled Generator ShutdownGenerator Shutdown

(1) Drain and clean the seal oil strainer. (2) Inspect the main and recalculating seal oil pumps and motors. (3) Inspect the emergency seal oil pump and motor. (4) Inspect the vacuum pump and geared motor. (5) Inspect and clean the inside of the vacuum tank and float trap, and also inspect the operation of the float valve and switch. (6) Clean the inside of the hydrogen detraining tank and air detraining tank. (7) Carry out the oil flushing of the shaft seal oil system of the generator. (8) Confirm that the seal oil is at the normal level.



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1. Daily Stator Cooling Water System Inspection and Tests1. Daily Stator Cooling Water System Inspection and Tests

(1) Observe all the indicating values and compare them with the normal operating conditions. (2) Check the differential pressure between the machine gas and the cooling water. (3) Check the water level in the storage tank.



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2. Weekly Stator Cooling Water System Inspection and Tests2. Weekly Stator Cooling Water System Inspection and Tests

(1) Alternate use of the in-service and standby stator cooling circulation pumps. (2) Check the pressure drop across the cooling liquid filters.



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3. Three to Six Monthly Stator Cooling Water System Inspection3. Three to Six Monthly Stator Cooling Water System Inspection and Testsand Tests (1) Check the quality of the stator cooling liquid. (2) Check the temperatures and thermocouples at the cooling liquid outlet connections.

(3) Calibrate the conductivity instrument.



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4. Six to Twelve Monthly Stator Cooling Water System Inspection4. Six to Twelve Monthly Stator Cooling Water System Inspection and Testsand Tests (1) Check the calibration of the automatic interlock devices. (2) Check the turbine interlock thermometer for high cooling water temperature.

(3) Check the calibration and operation of all alarm devices and/or contacts.



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5. Stator Cooling Water System Maintenance During5. Stator Cooling Water System Maintenance During Scheduled Generator ShutdownScheduled Generator Shutdown (1) Clean the flow meter tubes. (2) Inspect the stator cooling water pumps. (3) Replace the filter elements if necessary.

(4) Carry out the water flushing of the stator cooling water system of the generator.



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STATOR COOLING WATER FILTER MAINTENANCESTATOR COOLING WATER FILTER MAINTENANCE

Detailed View Of Filter ElementFilter Element

AA

Section A-A

Name of partCasingUpper coverSeparator plateSpringRetainerFilter elementCenter postSpacerGasketBoltNutLifter armLifter handleLegAir vent valveDrain valve

No.12345678910111213141516



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WATER OUTLET

STATOR COOLING WATER STATOR COOLING WATER DEIONIZER MAINTENANCEDEIONIZER MAINTENANCE

DEIONIZER RESIN

DETAILED VIEW OF DISTRIBUTOR DETAILED VIEW OF COLLECTOR

WATER INLET

“B”“A”


RESIN DISCHARGE


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5.5 CONTROL/MONITORING EQUIPMEN5.5 CONTROL/MONITORING EQUIPMENT FORT FOR

GENERATOR AUXILIARIESGENERATOR AUXILIARIES

CONTROL/MONITORING EQUIPMENT FOR GENERATOR AUXILIARIES


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GENERATOR AUXILIARY CONTROL PANELGENERATOR AUXILIARY CONTROL PANEL

H2 & Shaft Seal Oil System

Stator Water System


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ARRANGEMENT OF GACPARRANGEMENT OF GACP

SCW System Pump Running Condition

FRONT VIEW(WITH DOORS OPEN)


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ARRANGEMENT OF GACPARRANGEMENT OF GACP

H2/CO2 Gas Purity Indicator

Seal Oil System Pump Running Condition

FRONT VIEW(DOOR OPENING)


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STATOR COOLING WATER MEASURING RACKSTATOR COOLING WATER MEASURING RACK

Generator Inlet SCW Pressure Gauge

SCWP Discharge Pressure Gauge

SCW Flow Transmitter

SCWP Discharge Pressure Transmitter

Generator Inlet SCW Pressure Switches


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H2 GAS MEASURING RACK

H2 Gas Pressure Gauge

H2 / CO2 Gas Flow Meter

H2 / CO2 Gas Purity Meter

H2 Gas Pressure Transmitter

H2 / CO2 Gas Filter


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SEAL OIL GAUGE PANELSEAL OIL GAUGE PANELSeal Oil Vacuum Tank Pressure Gauge

MSOP Discharge Pressure Gauge

Seal Oil Feed Pressure Gauge

Seal Oil Vacuum Tank Pressure Transmitter

MSOP Discharge Pressure Switch

Seal Oil Differential Pressure Transmitter


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STATOR COOLING WATER AUXILIARY PANELSTATOR COOLING WATER AUXILIARY PANEL

SCW Pressure Controller

Generator Inlet SCW Conductivity Transducer

Generator Outlet SCW Conductivity Transducer

Deionizer Outlet SCW Conductivity Transducer

SCW Temperature Controller


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GENERATOR PROTECTION SYSTEM

5.6.1 GENERATOR PROTECTION SYST5.6.1 GENERATOR PROTECTION SYSTEMEM

5.6 GENERATOR CONTROL/PROTECTI5.6 GENERATOR CONTROL/PROTECTION EQUIPMENTON EQUIPMENT


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GENERATOR PROTECTION RELAY PANELGENERATOR PROTECTION RELAY PANEL

FRONT VIEW

Protection Relays

Lock-Out Relays

Test Terminals


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FUNDAMENTAL PROTECTIVE FUNCTIONS FOR GENERATORFUNDAMENTAL PROTECTIVE FUNCTIONS FOR GENERATOR

DEVICE No.

21

24

32

40

46

59

59N

60FL

81

87

51V

Description

Phase Distance

Over-excitation Protection(V/F)

Generator Reverse Power Protection

Generator Loss of Field Protection

Generator Negative Phase Sequence Protection

Generator Phase Over Voltage Protection

Generator Ground Fault Protection

VT Fuse Failure Supervision

Under/Over Frequency Protection

Generator Differential Protection

Generator Over Current Protection


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5.6.2 GENERATOR CONTROL/SYNCHR5.6.2 GENERATOR CONTROL/SYNCHRONIZING SYSTEMONIZING SYSTEM

GENERATOR CONTROL/SYNCHRONIZING SYSTEM


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GENERATOR CONTROL / SYNCHRONIZING PANELGENERATOR CONTROL / SYNCHRONIZING PANELSynchronizing scope

Meters For Synchronizing Operation

Meters For Monitoring Generator


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FUNDAMENTAL FUNCTIONS OF THE GENERATOR FUNDAMENTAL FUNCTIONS OF THE GENERATOR CONTROL/SYNCHRONIZING PANELCONTROL/SYNCHRONIZING PANEL

1.Monitoring Electrical Parameters of the Generator

- Current

- Voltage

- Power Output

- Reactive Power Quantities

- Power Quantities(Watt Hour)

-Frequency

-Power Factor

2.Generator Synchronizing Operation

- For Closing The Generator Circuit Breaker and EHV Circuit Breakers

Not Monitored Here

Not Monitored Here

Not Monitored Here


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END END GENERATOR AUXILIARY SYSTEM AND GENERATOR AUXILIARY SYSTEM AND

CONTROL EQUIPMENTCONTROL EQUIPMENT

generator aux

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