A PRESENTATION ON TURBOGENERATOR

AND EXCITER

SUBMITTED TO :Mr. Mahendra LalwaniMrs. Seema Meena

SUBMITTED BY :Mohit Chaudhary (12/050)Pooja Tripathi (12/056)Priyank Bisht (12/060)

Electrical Department, Rajasthan Technical University

CONTENT

1.BHEL-An Overview2.Turbo-generator• Basic Principle• Nomenclature Of

Turbogenerators3.Main parts of turbo-

generator • Stator• Rotor

4.Excitation System

BHEL

• BHEL was established in 1960’s in Bhopal under Indo-Soviet agreement.

• Largest engineering and manufacturing enterprise in India.

• Got 'Maharatna' status on 1 Feb,2013.• BHEL has a share of 59% in India’s total

installed generating capacity of power.• BHEL filed 351 patents and copyrights

with various organization.

BHEL- An Overview

BHEL in India

Bhopal

Bangalore

Haridwar

Goindwal

JagdishpurJhansi

Hyderabad

Tiruchy

Ranipet

Units in BHEL Haridwar

BHEL Haridwar

HEEP CFFP

Main Products

• Turbo-generator• Generator

exciters• Motors(AC & DC)• Steam turbines• Gas turbines

Turbo-generator• Turbo Generator is basically a turbine directly connected

to a generator for the generation of electricity.

• Turbo generator operates on the fundamental principles of ELECTROMAGNETIC INDUCTION.

• It converts mechanical energy into electrical energy.

• Mechanical motion is generated using a turbine as a prime mover which gets the rotational energy by dry steam or pressurised steam.

• Turbo generator rotor is filled with hydrogen gas which is used to prevent the coil from decaying.

• And the stator uses both hydrogen as well as water for cooling purpose.

Complete Arrangement of turbogenerator

Nomenclature of Turbo-generatorTARI 108/46THRI 108/44THDF 115/59

Types of Generator TARI – Air Cooled Turbo Generator Stator Winding – Indirectly Air Cooled Rotor Winding/Stator Core – Directly Air

Cooled

THRI – Hydrogen Cooled Turbo Generator Stator Winding – Indirectly Air Cooled Rotor Winding/Stator Core – Directly

Hydrogen Cooled THDF – Hydrogen/ Water Cooled Turbo

Generator Stator Winding – Directly Water Cooled Rotor Winding/Stator Core - Directly

Hydrogen Cooled

MAIN PARTS OF TURBO GENERATOR

StatorCore Assembly End ShieldsStator Winding Assembly RotorCompleting Assembly Exciter

Stator• Stator Body

• Stator Core

• Stator Winding

• Cooling System

Stator Core

• Core Press ring

• Core Bars

• Stamping

• Tension Bolt

• Spring

• Basket

• End Packets

• Magnetic Shunt

Rotor

• Rotor Shaft

• Rotor Winding

• Rotor wedges

• Retaining Ring

• Fans

• Field lead Connections

Excitation System

• The process of generating a magnetic field by means of an electric current is called excitation.

• It provides power to the field windings thus produce field for rotor.

Types of exciter

• Brush type exciter / Static excitation• Brush less exciter

Brush Type/Static Excitation

• Excitation is provided by current transfer by contact through Carbon Brushes, Slip ring and field lead.

BRUSH LESS EXCITATION SYSTEMPERMANENT MAGNETIC PILOT

EXCITERTHREE PHASE MAIN EXCITER

Advantage Of Brush Less Exciter Over Brush Type Exciter

• Eliminates Slip Rings, Brush gear and all problems associated with transfer of current via sliding contacts.

• Eliminates the Hazard of changing Brushes on Load

• Brush Losses are eliminated

Queries ?

THANK YOU