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Industrial Solutions and ServicesYour Success is Our Goal

Generator TLRI

Lecturer: Dipl. Ing. Christian Kramp

SiemensIndustrialServices

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Table of Contents

Introduction

Trainer

Trainees

Safety instructions

Electrical part, general

Generator

Stator, Stator Windings

Rotor, Rotor windings

Excitation system

Rotating rectifiers

Grounding brushes

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Safety instructions

Work on electrical plant of steam turbine may be performed solely by trained and qualified electrical specialists or by other staff under the direction and supervision of an electrical specialist in conformity with the relevant electrical installation regulations

The following 5 safety rules must be observed prior to commencement of any work whatsoever on the electrical equipment / components / plants:

1. De-energize equipment by switching measures 2. Secure the equipment against re-closure 3. Verify that the equipment is de-energized (dead) 4. Earth and short-circuit the equipment 5. Cover adjacent parts which are under voltage or provide barriers

The electrical equipment of the steam turbine/generator should be inspected regularly. Defects should be repaired immediately

! Danger ! Electric current !

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General

• Two-Pole Air-Cooled Turbogenerator

• Typ: TLRI

• Type of construction IM 7215

• Protection class IP 54

min1

1

503000

1

s

PairsRated p

fn

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Rating Plate

Turbogenerator

Air cooledRadial cooling of rotor winding

Indirect cooling of stator winding

T

LR

I115

52

Rotor diameter in cm

Length in dm

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Main Design Groups

1 Base Frame

2 Stator Core

3 Stator Winding

4 Rotor Shaft

5 Rotor Winding

6 Exciter

7 Air Cooler

8 Connections

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Measurements

7 Temperature detector bearing TE

8 Temperature detector bearing EE

9 Shaft vibration detector TE

10 Shaft vibration detector EE

11 Leakage Sensor TE/EE

1/2 Anti condensation heater*

3 Stator winding temperature detector

4 Temperature detector cold air TE

5 Temperature detector cold air EE

6 Temperature detector warm air grounding

brush

air dryer

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Screen: Generator Temperature

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Screen: Vibration Monitoring

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Cooling Air Circuit

→ Hot Air → Cold Air

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Stator

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Stator: Core

1 Tension studs 4 Core parceler

2 Pressure plate 5 Duct spacer

3 Cooling duct

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Stator Winding: Two Layer Single Coil

1 Outer Corona Protection

2 End Corona Protection

3 Coil Terminals

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Stator Slot with Winding

1 Stator Core

2 Slot Wedge

3 Slide Strip

4 Top Strip

5 Vertical Separating Strip

6 Solid Strand

7 High Voltage Insulation

8 Center Filler

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Stator: End Winding with Supports

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Stator

Air Baffle Cover

Inside Air Baffle

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Rotor

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Rotor

- shaft

- rotor core

- field winding

- damper winding

- fans

- retaining rings

- bandings

- excitation system

The rotor consists of:

Rotor shaft

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Rotor core

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Rotor, longitudinal cut

1 Shaft 6 Core locking bars

2 Rotor core 7 Winding support

3 Clamping bolt 8 Fan (Balancing disk)

4 Clamping ring 9 Banding

5 Radial cooling ducts 10 Balancing slot

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Rotor, longitudinal cut

Damper winding for direct-axis and quadrature-axis field damping for a maximum of 10% unbalanced load.

1 Field winding slots

2 Damper winding slot

3 Keyway

4 Axial cooling ducts

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Rotor Slot with Winding

1 Rotor slot wedge

3 Cooling air outlet duct in rotor slot wedge

4 Rotor shaft

5 Top strip

6 Slot liner

7 Conductor

8 Winding insulation

9 Slot bottom duct

10 Ventilation slot through conductors

4

5

7

9

10

8

6

1 3

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Exciter

Stator Rotor

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Rotating Rectifiers

1 Heat sink

2 Diodes

3 Capacitor

4 Resistor

1

2

3

4

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Exciter, Slip Rings

Measuring Brushes

Excitation Voltage Measurement / Rotor Earth Fault Protection

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Exciter current conductor

2

2

1

13

1 Connection to the rotating rectifier bridge / slip rings

2 Connection to the rotor winding

3 Bearing position

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Excitation Scematic, Sliprings

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Brushes, Brush Holder

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Schematic of Generator – Exciter System

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Generator Capability Characteristic

IE IErated

I1 Irated

Magnet wheel angle limit line

= 70°

Srated

LoadPoint Rated

Srated =102,0 MVA

Urated 10,50 kV

Irated 5,609 kA

cos φ 0,85

P limited by turbine power

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Screen: Generator Capability Diagram

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Magnetic Field at Load

Load angle 40°

Stator

Rotor

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Permissible operating ranges

Continuous operationat rated load

Continuous and short timeoperation at reduced load

Short time operation

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Grounding Brushes

1 Brush holder

2 Grounding brush, silver layer

3 Grounding brush, carbon layer

4 Brush spindle

5 Rotor shaft

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Simplyfied Generator Startup Procedere

Industrial Solutions and ServicesYour Success is Our Goal

Thank you very much for your attention.

Contact:

Christian KrampI&S IS ICS 23Werner von Siemens Strasse 6091054 ErlangenPhone: +49 (9131) 7-43800

Mail: christian.kramp@siemens.com

SiemensIndustrialServices

End of Chapter Generator

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Anti Condensate Heater - Air Dryer

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Operating and Setting Values