This document summarizes a presentation given by Prakhar Mehrotra and Siddharth Raj at BHEL Haridwar on turbo generators and exciters. It provides an overview of BHEL, describing its establishment, products, and locations. It then focuses on turbo generators, describing their basic workings, types including TARI, THRI and THDF models, main parts, and excitation systems. Brush and brushless excitation systems are explained. The presentation aims to educate about turbo generators and exciters.

1. A Presentationon
Turbo Generator & Exciter
BHEL Haridwar
SUBMITTEDBY-
PRAKHARMEHROTRA
SIDDHARTH RAJ
SUBMITTED TO –
PROF. O.P. ARORA (HOD)
PROF. RKMATHUR
Duration: 01 June,2013 to 28 June, 2013
DEPTT. OF MECHANICAL ENGG.
BHAGWANT UNIVERSITY

2. About BHEL
 BHEL was established in 1960’s in Bhopal underIndo-Sovietagreement.
 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.

3. BHEL in India
1. Bhopal
2. Bangalore
3. Haridwar
4. Goindwal
5. Jagdishpur
6. Jhansi
7. Hyderabad
8. Tiruchy
9. Ranipet

4. Units in BHELHaridwar
BHELHaridwar
HEEP CFFP Defence PCRI

5. Main Products
 Turbo Generator
 Generator exciters
 Motors (AC & DC)
 Steam turbines
 Hydro turbines
 Gas turbines

6. Turbo-generator
• Turbo generator operates on the fundamental principles
ofELECTROMAGNETICINDUCTION.
• It converts mechanical energy into electrical energy.
• It is a turbine directly connected to electric generator for the generation of electricity.
• Mechanical motion is generated in turbine by using heat.
• Turbo generatorrotor is filled with hydrogen gas which is used to prevent the coil from
decaying.

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

8. 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

9. MAIN PARTS OF TURBO GENERATOR
 Stator- Stator Frame (Fabrication & Machining)
 Core Assembly- Stator Core, Core Suspension Arrangement
 End Shields
 Stator Winding Assembly- Stator Winding, Winding Assembly, Connecting Bus bar
 Rotor- Rotor Shaft, Rotor Wedges, Rotor Coils, Wound Rotor, Rotor Assembly
 Completing Assembly- Bearing Assembly, Shaft Seal Assembly, Oil Catchers, Insert
Cover etc
 Exciter
 Auxiliary System

10. Stator Frame
Stator winding

11. 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:
 Brushtype exciter / Static excitation
 Brushless exciter

12. Brush Type/Static Excitation
 Rotor Field Winding is connected to Slip ring mounted on Rotor.
 Excitation is provided by current transfer by contact through Carbon Brushes, Slip ring
and field lead.

13. BRUSH LESS EXCITATION SYSTEM
 PERMANENT MAGNETIC PILOT EXCITER
 THREE PHASE MAIN EXCITER

14. AdvantageOf Brush Less Exciter Over Brush Type Exciter
 Eliminates Slip Rings, Brush gear and Field Breaker
 Eliminates all problems associated with transfer of current via sliding contacts
 Eliminates the Hazard of changing Brushes on Load
 Brush Losses are eliminated

15. THANK YOU