This document provides an overview of the Kahalgaon Thermal Power Plant and its key components and processes. It describes how coal is transported to the plant by rail and crushed before being pulverized and burned in the boiler to create steam. The steam then powers a turbine connected to a generator to produce electricity. Important components discussed include the boiler, superheater, reheater, condenser, cooling tower, and economizer. The document also provides specifications for the 210MW turbo generator units including voltage, current, power factor, and speed.

1. WELCOME

2. An Overview of
KAHALGAON (2340MW)
Presented By
XXXX XXXXXX
College NAme

3. INTRODUCTION
In Thermal Power Station fuel burns & use the
resultant to make the steam, which drives
TURBO GENERATOR
Water
Fuel
Burns
Steam
(Prime Mover)
Turbine
(Coupled with
Generator)

4. The Coal based Thermal Power Plant
can be divided in Three Parts
COAL FLOW
AIR FLOW
WATER(STEAM) FLOW

5. COAL IS TRANSFERRED FROM COAL MINES TO
POWER PLANT BY RAILWAY IN WAGONS
CRUSHER HOUSE (CRUSHED TO 20mm)
DEAD STORAGE (STORED FOR 40 DAYS COAL SUPPLY)
PULVERISER(PULVARISED TO 200 mesh)
BOILER (MIXED WITH HOT AIR AND BURNT)

6. STEAM(WATER) FLOW
L
H
Economizer
Reheater
Evaporator
_
H
Describing the function of a Thermal Power plant

7. Some Important Components
BOILER :
The boiler is a rectangular furnace about 15m sides and 40m tall. Coal is
burned inside the combustion chamber of boiler.
DRUM:
The temp is 540˚C and pressure is 150kg/sq.cm
SUPERHEATER:
After leaving the Boiler the steam is heated above its saturation
temperature in Superheater. The temp is 540˚C and pressure is
150kg/sq.cm

8. REHEATER:
Reheater is also steam boiler component in which heat is
added to this intermediate-pressure steam. The temp is
540˚C and pressure is 35kg/sq.cm
Condenser & Cooling Tower:
It is used to condense the steam coming out of the Low
pressure turbine
Economizer:
Function of Economizer is to recover some of the heat from
the flue gas and utilizes it to heat the feed water to going
to the Boiler

9. TURBO GENERATOR
 A turbo generator is the combination of
a turbine directly connected to an electric generator for
the generation of electric power.
 At NTPC Kahalgaon hydrogen-cooled
turbo generator is installed.
It is a turbo generator with gaseous
hydrogen as a coolant
Specification of 210MW unit(NTPC Kahalgaon)
Apparent Power: 247000kVA
Active Power : 210000kW
Stator Voltage : 15750V
Stator Current : 9065A
Power Factor : 0.85
Frequency
: 50Hz
Speed
: 3000rpm (3200rpm over
speed)
 Coolant
: Hydrogen








10. GENERATOR TRANSFORMER
From the generator the electricity then goes to a transformer
where the voltage is increased to about 420kV before sending it
via cables
SPECIFICATIONS (NTPC Kahalgaon)
•
•
•
•
•
•
Type
: Two Winding
Maker
: BHEL
Rating
: 250MVA
Voltage Ratio: 15.47/420kV
Frequency : 50Hz
Vector Group : Yd

11. Other electric components used..

Circuit Breaker

Relay

Bus Bar

Isolators

Insulators

Lightning Arresters

Wave Trap

Instrument Transformer

Power Transformer

12. THANK YOU