2. Overview - B.H.E.L
BHEL is the largest
engineering
&manufacturing enterprise
in India.
Established 40 years ago.
Earns profits continuously
since 1971-72,& paying
dividends since 1976-77
3. Vision, Mission & Values
Vision
Mission
Values
• A world class engineering enterprise committed to enhancing
stakeholder values.
• To be an Indian multinational engineering enterprise
providing total business solution through quality products.
• Meeting commitments made to external & internal customers.
• Respect for dignity & potential of individuals.
• Integrity and fairness in all matters.
8. Sailent feature of Turbo Genrator
Rated output
:
588 MVA,500 MW
Terminal voltage
:
21 KV
Rated stator current
:
16 KA
Rated frequency
:
50 Hz
Rated power factor
:
0.85 Lag
Efficiency
:
98.55%
9. Turbo Genrator
Turbo generator consists of
following parts:
o
o
o
o
STATOR
ROTOR
BEARINGS
SHAFT BEARINGS
Other additional auxiliaries:
o Excitation system
11. Stator frame
Stator body is a totally
enclosed gas tight fabricated
structure made up of high
quality mild steel
At top of the stator frame U-
shape pipe is situated which
are used to flow of water
for cooling .
12. Stator Core
The laminated core made by
cold rolled high quality
silicon steel
It is stacked with lamination
segments & Segments are
assembled in an interleaved
manner from layer to layer
for uniform permeability.
13. Stator Winding
The stator has a three phase,
double layer, short pitched and
bar type of windings having two
parallel paths
Each bar consist of hollow
conductor with cooling water
passing through the latter.
Bhel used to epoxy mica
thermosetting insulation for
stator bars.
14. Vaccum Pressure Impregration
In 1956 Dr. MEYER has
brought this system.
In this process preheating,
impregration,post curing&
electrical testing are done.
It remove the penetrating air
pockets in the winding.
16. Rotor shaft
Rotor shaft is a single piece
solid forging manufactured
from a vacuum casting.
The longnitudnal slots are
distributed over the
circumfrence
17. Rotor winding
The rotor winding distributed
symmetrical in the rotor pole
The winding itself is made
up of many turns of copper .
All of the turns associated
with a single slot are called a
coil.
19. Retaning Ring
The overhang portion of the field winding is held by non-
magnetic steel forging of retaining against centrifugal forces.
They are shrink fitted to the ends of the rotor body at one end.
The other side of retaining ring does not make contact with the
shaft .
To reduce stray losses, the retaining rings are made of non-
magnetic, austenitic steel and cold worked, resulting in high
mechanical strength.
20. Fans
The generator cooling gas is
circulated by two single
stage axial flow propeller
type fans.
The fans are shrink fitted on
either side of rotor body.
Fan hubs are made of alloy
steel.
Fan blades which are
precision castings with
special alloy are machined
in the tall portion.
