Industrial Training Project on Turbo Generators Presented By-

Overview of B.H.E.L. Bharat Heavy Electricals Limited (B.H.E.L.) is the largest engineering and manufacturing enterprise in India. BHEL caters to core sectors of the Indian Economy viz., Power Generation's & Transmission, Industry, Transportation, Telecommunication, Renewable Energy, Defense and many more. BHEL has its setup spread all over India namely New Delhi,Gurgaon,Hardwar, Rudrapur, Jhansi, Bhopal, Hyderabad, Jagdishpur, Tiruchirapalli, Banglore and many more.

B.H.E.L., Hardwar Bharat Heavy Electricals Limited (B.H.E.L.), Hardwar has two manufacturing plants:- Heavy Electrical Equipment Plant(HEEP) Central Foundry Forge Plant(CFFP)

H.E.E.P. Heavy Electrical Equipment Plant (HEEP) located in Hardwar is one of the major manufacturing plants of BHEL. The core business of HEEP includes design and manufacturing of large steam and gas turbines, turbo generators, hydro turbines and generators, large AC/DC motors and so on.

The various blocks in HEEP are as follows: Block-1: Turbo generator Shop Block-2: Fabrication Shop Block-3: Turbine Shop Block-4: Insulation Block Block-5: Forging Shop Block-6: Stamping Shop Block-7: Packing and Wood Working Shop Block-8: Condenser and Piping Shop New Blade Shop

PROJECT TURBO GENERATORS

BLOCK -1 Machine section Assembly section Hydro generator Stator winding Iron assembly Heavy rotor assembly section Stator winding section Turbo generator Armature/Rotor section General assembly section Test stands

STUDY OF TURBO GENERATOR

TECHNICAL DATA Rated data & output Turbo generator Main exciter Pilot exciter Apparent power 588 MVA - 65kVA Active power 500 MW 3780 KW Current 16.2 KA 5300 A 195 A Voltage 21 KV 600 V 220 V Frequency 50 Hz 400 Hz Power factor 0.85 Hydrogen pressure 3.5 Bar Rated field current 4040 A Rated field voltage 340 V

RECTIFIER WHEEL Number of fuses per rectifier wheel 30(800V ,800A) Fuse resistance Approx 150 μ ohm Number of diode per rectifier wheel 60

Constructional Features Of Turbo Generator The two pole uses hydrogen cooling for rotor winding and direct water cooling stator winding. Turbo generator consists of following parts: STATOR ROTOR BEARINGS SHAFT BEARINGS Other additional auxiliaries: Excitation system Gas system

STATOR Stator consists of following parts: Stator frame Stator core Stator winding Locating bars End shields Terminal bushings Phase connectors Hydrogen cooler End winding vibration Supervision of generator

STATOR FRAME

STATOR CORE

ROTOR Rotor consists of following parts: Rotor shaft Rotor winding Retaining ring Field connection Fans Rotor cooling system Bearings Shaft seals

ROTOR SHAFT

ROTOR WINDING

RETAINING RING

FAN

AUXILLARY SYSTEMS GAS SYSTEM BRUSHLESS EXCITATION SYSTEM PERMANENT MAGNETIC PILOT EXCITER THREE PHASE MAIN EXCITER AUTOMATIC VOLTAGE REGULATOR RECTIFIER WHEELS COOLING SYSTEM

RECTIFIER WHEEL

COOLING SYSTEM The exciter is air cooled. The cooling air is circulated in a closed circuit and recooled in two cooling sections arranged along side the exciter. The complete exciter is housed in an enclosure draw the cool air in at both ends and expels the warmed air to the compartment beneath the base plate.The main exciter enclosure receives the cool air from the fan after it passes over the pilot exciter.

BRUSHLESS EXCITER

PERMANENT MAGNET EXCITER

Advantage Of Turbo Generator Over Hydro Generator High frequency , N=120*f* π/ p From here, f=N*p/120 π Here we see, f is directly proportional to N Less corrosion. high stability.

CONCLUSION As steam is used so no site problem. Turbo Generators are used where high frequency supply is required. As steam is used so no site problem.

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