KOTA SUPER THERMAL POWER STATION

(K.S.T.P.S), KOTA 2016-17

Introduction –kstpsBy Avdhesh kumar meena

B.Tech 4th Year Electrical BranchNIET Alwar Rajasthan

INDEX

0. KSTPS PICTURES 1.INTRODUCTION 2. GENERAL LAYOUT AND BASIC IDEA 3.TURBO GENERATOR 4.COOLING SYSTEM 5.TRANSFORMERS

KSTPS LOOKING AT SPACE

Looking at surface

1. INTRODUCTION• Kota Super Thermal Power Station is the first coal based Electricity Generating station in rajasthan.

• At present the total installedcapacity of

KSTPS is 1240 MW.

• KSTPS has received Meritories productivity awards during 1984, 1987, 1989, 1981 and every year since 1992 onwards.

K.S.T.P.S. IS DESISIGNED IN

FOLLOWING STAGES:- STAGE I - 2x110 MW STAGE II - 2X210 MW STAGE III - 1X210 MW STAGE IV - 1X195 MW STAGE V - 1X195MW

Stage Unit numberInstalled capacity (

MW)Date of

commissioningStatus

Stage I 1 110 January 1983 Running

Stage I 2 110 July, 1983 Running

Stage II 3 210 September 1988 Running

Stage II 4 210 May, 1989 Running

Stage III 5 210 March 1994 Running

Stage IV 6 195 July, 2003 Running

Stage V 7 195 May 2009Running

Installed capacity

•The planning commission cleared the project report in Sept., 1976 for installation of two units each of 110 MW in first estimated cost of Rs. 143 Crores .

•And finally stage fifth Unit #7 costed approximately Rs. 961 Crores.

COAL: 1.Northern Coal Fields Limited(NCL), 2.South Eastern Coal Fields

Limited(SECL)• Coal India limited is supply coal

from its coal mines of coal producing subsidiaries SECL & NCL to Kota Thermal Power Station through railway wagons.

• The average distances of SECL, NCL are 800, 950 Kms. respectively.

WATER:- •The source of water for power station is reservoir formed by Kota Barrage on the Chambal River. • In case of large capacity plants huge quantities of coal and water is required.

2. General Layout & Basic Idea •The Kota Thermal Power Station is divided into four main circuits : 1.Fuel and Ash Circuit.

2 .Air and Gas Circuit. 3.Feed water and Steam Circuit. 4.Cooling Water Circuit.

• A control system of station basically works on Rankin Cycle.

(a).COAL HANDLING PLANT

•It can be called the heart of thermal power plant because it provided the fuel for combustion in boiler.

•Everyday 6 to 7 trains of coal are unloaded at KSTPS.

• Each train consists of 58 wagons and each wagons consists of 50 tones of coal.

• The approximate per day consumption at KSTPS is about 18000 metric tones.

• The whole transportation of coal is through conveyor belt operated by 3-Ø Induction motor. • It costs approximate 4.5 crores of rupees per day including transportation expenses.

•The coal handling plant can broadly be divided into thre sections. 1) Wagon Unloading system. 2) Crushing System. 3) Conveying System.

(b) ASH HANDLING PLANT

• This plant can be divided into 3 sub plants as follows:-

1)Fuel and Ash Plant.

2)Air and Gas Plant.

3)Ash Disposal and & Dust Collection Plant

USES ASH:

1.Manufacturing of building materials. 2.Making of concrete. 3.Manufacturing of pozzuolana cement. 4. Road construction

(C). ELECTRO-STATIC PRECIPITATOR

•As far as air pollution is concerned now a days various flue gases filter are there in service.• •These filters are E.S.P. Fabric filter high efficiency cyclone separations and sitelling room.

•where the particle size vary from 0.75 microns to 100 micron use gradually use E.S.P. to purify the flue gases due to its higher efficiency & low running cost etc.

6.TURBO GENERATOR THEORY :-

•TURBO GENERATOR manufactured by B.H.E.L.

• The generator stator is a tight construction, supporting & enclosing the stator windings, core and hydrogen coolers.

• The generator is driven by directly coupled steam turbine at a speed of 3000 r. p. m. the Generator is designed for continuous operation at the rated output.

• The source of excitation of rotor windings is thyristor controlled D.C. supply.

TECHNICAL DATA:-

Generator (110 MW):- Type : t.g.p. 2,34,602 Continuous apparent power : 1,37,500 KVA. Active power : 7,10,000 KW. Power factor : 0.8 (lagging). Rated voltage : 1000 + 5% rated. Current : 7,220 A Critical speed : 3000 r. p. m. at frequency : 50 Hz. Phase connection : double star. No. of terminals : 6. Main diameter of slip rings : 420 mm. Voltage regulation : 39%. Reactance : Infor

Main parts of generator:-(a)STATOR:-STATOR FRAME:- The stator frame of welded steel frame construction.STATOR CORE:-•It is built up of special sheet laminations and whose assembly is supported by a special guide bass.STATOR BARS:-•Stator bars are manufactured as half bars, For an equal length along the bar.STATOR WINDINGS:- •Stator windings are double star layers , lap wound, three phase, short pitch type.• Phases are connected to form a double star winding.TERMINAL BUSHINGS:- • The conductor of Generator terminal bushing having hollow copper tubes with Copper brazed at the ends to avoid leakage of hydrogen. BEARINGS:-Generator bearings have electrical seats of consists of steel bodies with removable steel pads. HYDROGEN COOLERS:-•Three Hydrogen Coolers each comprising of two individual units are mounted inside the stator frame.

VIBRATION OF ROTOR:

-

4.COOLING SYSTEM

a) GENERAL:-

•In KSTPS hydrogen cooling system is employed for generator cooling.

• Hydrogen is used for cooling medium primarily because of its superior cooling properties & low density.

• Thermal conductivity of hydrogen 7.3 times of air.

• Its ability to transfer heat through forced convection is about 75% better than air.

b)HYDROGEN DRYERS:-

•Moisture in this gas is absorbed by silica gel in the dryer as the absorbed gas passes through it.

•The silica gel is reactivated by heating.

10.TRANSFORMER•Transformer is a static device which is used to change the voltage level keeping the power and frequency same. •In the plant transformer is one of the most important equipment. •It is located in between the main plant and the switchyard. The main transformers installed in the transformer yard are:

•GENERATOR TRANSFORMER (GT – A):-It steps up the voltage from 16.5 KV to 220 KV. It connects the plant with the 220 KV switchyard.

•GENERATOR TRANSFORMER (GT – B):-It steps up the voltage from 16.5 KV to 400 KV. It connects the plant with the 400 KV switchyard.

•STATION TRANSFORMER (ST):-It is a step down transformer with 50 MVA capacities. It is used to step down 220 KV from the grid to 6.9 KV.

•AUXILIARY TRANSFORMER (UAT):-It is a step down transformer with 20 MVA capacities. It steps down the voltage from 16.5 KV to 6.9 KV. • STATION SERVICE TRANSFORMER (SST):-It is a step down transformer with 2MVA capacity. It is used to step down from 6.6 KV to 0.4333 KV. • UNIT SERVICE TRANSFORMER (UST):-It is a step down transformer with 2 MVA capacity. It is used to step down from 6.6 kV to 0.4333 KV.

Thanks