a presentation on turbogenerator and excitor

A PRESENTATION ONTURBO GENERATOR & EXCITER

BHEL HARIDWAR

SUBMITTED BY-

PRAKHAR MEHROTRA

SIDDHARTH RAJ

SUBMITTED TO –PROF. O.P. ARORA (HOD)PROF. RK MATHUR

Duration: 01 June,2013 to 28 June, 2013

DEPTT. OF MECHANICAL ENGG.BHAGWANT UNIVERSITY

ABOUT 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 IN INDIA1. Bhopal 2. Bangalore 3. Haridwar 4. Goindwal5. Jagdishpur6. Jhansi7. Hyderabad8. Tiruchy9. Ranipet

UNITS IN BHEL HARIDWAR

BHEL Haridwa

r

HEEP CFFP Defence PCRI

MAIN PRODUCTS Turbo Generator Generator exciters Motors (AC & DC) Steam turbines Hydro turbines Gas turbines

TURBO-GENERATOR• Turbo generator operates on the fundamental

principles of ELECTROMAGNETIC INDUCTION.• 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 generator rotor is filled with hydrogen gas

which is used to prevent the coil from decaying.

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 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

Stator Frame

Stator winding

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 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.

BRUSH LESS EXCITATION SYSTEM PERMANENT MAGNETIC PILOT EXCITER THREE PHASE MAIN EXCITER

ADVANTAGE OF 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

THANK YOU