Heavy Electrical Equipment Plant (HEEP)

Created By – Paramjeet Singh Jamwal

Submitted to – Mrs. Anuradha

Session – 2010-2011

BHEL

Largest Engineering and Manufacturing Enterprise.

Manufacturing Electrical and Mechanical Equipment.

Ranked among the top 10 companies in the world.

10 Manufacturing Divisions, 8 Service Centers, 4 Power factor regional Centers, Projects sites.

Overview

Production started in January 1967. In 1976, agreement with M/s Kraftwerk

Union, AG of Germany.More than 40% of Electrical Energy.

HEEP

250 MW Totally Impregnated

Turbo generator

•Voltage - 16500•Current – 10291Main Output

•Voltage – 299 V •Current – 2497 AExcitation•294100 KVA•25000 KWPower•Direct gas cooling of stator winding.•Indirect gas cooling of rotor winding.Cooling•Gas pressure – 4 kg/cm2

•Coolant - HydrogenOther

Specification:

Main parts:

Stator

•Stator frame•Stator core•Core winding assembly

Rotor

•Rotor shaft•Rotor winding•Rotor retaing rings

Stator Frame:

Single piece construction of welded steel.Supports the laminated core and winding.Minimize core vibrations and ensure

efficient cooling.Guide bars are welded inside the stator

frame.Rigid casing is required.

Stator Frame:

Stator Core:

Mounted in outer casing by welded springs.Made by stacking from the insulated

electrical sheet steel lamination.mounted in supporting rings over the

insulated dovetail guide bars.Core is made of thin laminations in order to

minimize eddy current losses.Ventilation ducts are distribute the gas

accurately over the core.

Stator Core:

Core and winding assembly

Rotor Shaft:

Single piece solid forging manufactured from a vacuum casting.

Rotor shaft is forged from a vacuum cast steel ingot.

Aprox 60% of the rotor body circumference is provided with logitudinal slots which hold the field winding.

Non uniform slot distribution on the circumference.

Rotor Shaft:

Rotor Winding:Consist of several coils which are inserted

into the slots.Two coil group form one pole.Several series connected turn each coil.Each turn consist of two longitudinal and two

transverse turns.Turns of the coils are insulated from each

other by interlayer.

It contained the centrifugal force of the rotor end windings.

Made of non-magnetic high strength steel (reduce stray losses).

Secured in the axial position by a snap rings.

Rotor retaining ring: