project report on thdc hydrop power plant summer training
TRANSCRIPT
Tehri Hydro Power PlantSummer Training Presentation
Charu Kandpal110970105019
Electrical Engineering
Department of Electrical EngineeringTHDC Institute of Hydropower Engineering
and Technology
16/12/2014
Contents
Introduction1
Power Generation2
Excitation System 3
Braking System4
Gas Insulated Switchyard5
THDC IHET
Introduction
TEHRI HYDRO DEVELOPMENT CORPORATION, or THDC, is a joint venture of the Central Government and Uttar Pradesh State Government (Now Uttarakhand Government).
The Tehri Dam is a multi-purpose rock and earth-fill embankment dam at the confluence of Bhagirathi and Bhilangna River at Tehri in Uttarakhand, India. Tehri Hydro Power Projects comprises of three phases.
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Phases of Tehri Hydro Plant
Phases
Phase 1 Phase 2 Phase 3
Tehri HEP (4X250MW) was completed in 2006.
Koteshwar HEP (4X100MW) was completed in 2012.
(4X250MW) Pumped storage Plant of hydroelectricity generation is under construction.
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Cycle Diagram
PSP
Storage HRT
Turbine
TRT
Water Flow Diagram
Working of PSP
THDC IHET
LowerStorage
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Tehri HEP System Classification
Systems of
HEP
Generation System
Braking System
GIS System Tehri Excitation System
THDC IHET
Power Generation
Four Francis TurbinesThrough BVC
Four PenstocksFeeds Four
Turbines
Turbine Rotates Excited Rotor
Water Rotates Turbine Blades
One HRT = Two Penstocks
Water Flows Through HRTs
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According To Faraday’s Law
Pictorial Representation of Generation
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Need of an Excitation System
The basic principle of power generation is when amagnetic field is moved across a stationary conductor,
Voltage gets induced in the conductor.
The basic principle of power generation is when amagnetic field is moved across a stationary conductor,
Voltage gets induced in the conductor.
Voltage will be induced even if conductor is rotated andmagnetic field is kept stationary .
Voltage will be induced even if conductor is rotated andmagnetic field is kept stationary .
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THDC IHET
Need of an Excitation System
1Intensity of the flux in rotating magnetic field. This can be varied by DC current applying to the electromagnet.
2 3
Length of the conductor. This can’t be varied due to manufacturing reasons.
Generator output voltage is affected by the following factors:
Rate at which flux lines cut by the conductor. This can’t be changed due to the const. speed
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THDC IHET
Braking System
Wicket G
ates are Closed.
Normal Speed
Process 1
Current in opposite
excitation P
rocess 2
Mechanical B
reaks P
rocess 3
Machine Stopped
Process 4
1 2 3 4
Speed<50% Speed<4% END
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THDC IHET
Gas Insulated Switchyard
Power Grid TransmissionGeneration
Transformer
GIS
Power Grid
Step Up 15.75 KV into400 KV
Passed through GIS
Generation occurs at 15.75 KV
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