This document provides an overview of Bharat Heavy Electricals Limited (BHEL) and turbo-generators. It discusses that BHEL was established in 1960s under an Indo-Soviet agreement and is now India's largest engineering and manufacturing company. It then focuses on turbo-generators, explaining that they directly connect turbines to generators to convert mechanical energy to electrical energy. The main components of a turbo-generator discussed are the stator, rotor, and excitation system.

1. SUBMITTED TO :
Mr. Mahendra Lalwani
Mrs. Seema Meena
SUBMITTED BY :
Mohit Chaudhary (12/050)
Pooja Tripathi (12/056)
Priyank Bisht (12/060)
Electrical Department, Rajasthan Technical University

2. CONTENT
1. BHEL-An Overview
2. Turbo-generator
•Basic Principle
•Nomenclature Of
Turbogenerators
3. Main parts of turbo-generator
•Stator
•Rotor
4. Excitation System

3. • 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

4. BHEL in India
Bhopal
Bangal
ore
Haridw
ar
Goindw
al
Jagdish
pur
Jhansi
Hydera
bad
Tiruchy
Ranipet

5. Units in BHEL Haridwar
BHEL
Haridwar
HEEP CFFP

6. Main Products
• Turbo-generator
• Generator exciters
• Motors(AC & DC)
• Steam turbines
• Gas turbines

7. 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.

8. Complete Arrangement of turbogenerator

10. Nomenclature of Turbo-generator
TARI 108/46
THRI 108/44
THDF 115/59

11. 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

12. MAIN PARTS OF TURBO GENERATOR
 Stator
 Core Assembly
 End Shields
 Stator Winding Assembly
 Rotor
 Completing Assembly
 Exciter

13. Stator
• Stator Body
• Stator Core
• Stator Winding
• Cooling System

14. Stator Core
• Core Press ring
• Core Bars
• Stamping
• Tension Bolt
• Spring
• Basket
• End Packets
• Magnetic Shunt

18. Rotor
• Rotor Shaft
• Rotor Winding
• Rotor wedges
• Retaining Ring
• Fans
• Field lead Connections

22. 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

23. Brush Type/Static Excitation
• Excitation is provided by current transfer by contact
through Carbon Brushes, Slip ring and field lead.

24. BRUSH LESS EXCITATION SYSTEM
 PERMANENT MAGNETIC PILOT EXCITER
 THREE PHASE MAIN EXCITER

25. 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