Bhelparamjeet 121106032837-phpapp02 1-
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This document provides details about a Heavy Electrical Equipment Plant (HEEP) that manufactures large turbo generators. It describes the main components of a 250 MW totally impregnated turbo generator produced at the plant, including the stator frame, stator core, core and winding assembly, rotor shaft, rotor winding, and rotor retaining ring. The stator frame supports the laminated core and winding and guides vibration. The stator core is made of insulated electrical sheet steel laminations. The rotor shaft is a single piece forging made from vacuum cast steel that holds the field winding in longitudinal slots.
Bhelparamjeet 121106032837-phpapp02 1-
- 1. Heavy Electrical Equipment Plant (HEEP) C reat ed By – Par amj eet Sing h J am wal Subm it t ed to – Mr s . Anur adha Ses s ion – 2010-2011 BHEL
- 2. 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
- 3. Production started in January 1967. In 1976, agreement with M/sKraftwerkUnion, AG of Germany. More than 40% of Electrical Energy. HEEP
- 4. 250 MW Totally Impregnated Turbo generator
- 6. Main parts:
- 8. 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:
- 9. Stator Core:
- 10. Mounted in outer casing by welded springs. Made by stackingfrom 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:
- 11. Core and winding assembly
- 12. Rotor Shaft:
- 13. Single piece solid forging manufactured from a vacuum casting. Rotor shaft is forged from a vacuum cast steel ingot. Aprox60% of the rotor body circumference is provided withlogitudinalslots which hold the field winding. Non uniform slot distribution on the circumference. Rotor Shaft:
- 14. 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.
- 15. 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: