NTPC Auraiya Industrial Training

1. INDUSTRIAL TRAINING AT A BHITENDRA S INGH B.T ECH IV Y EAR S ECTION - F

2. ABOUT NTPC Limited is the largest power generating company of India . A public sector company, it was incorporated in the year 1975 to accelerate power development in the country as a wholly owned company of the Government of India. It has an electric power generating capacity of 41,184 MW. It is one of the seven Maharatna companies.

3. ABOUT It has 15 coal based (24,395 MW ). 7 gas based (3,955 MW ). 4 Joint Venture Projects (2,294 MW). NTPC's share on 31 Mar 2008 in the total installed capacity of the country was 19.1% and it contributed 28.50% of the total power generation of the country during 2008-09.

4. AURAIYA GAS POWER PLANT NTPC Auraiya is located at Dibiyapur in Auraiya district in the state of Uttar Pradesh.

5. AURAIYA GAS POWER PLANT BRIEF DISCRIPTION Type of station : Gas based combined cycle Established : 1989 Location : Dibiyapur in Auraiya district of UP Fuel : Natural Gas, Naphtha Fuel source : HBJ Pipeline - South Basin Gas field Water source : Auraiya – Etawah Canal Gas Turbine Output : 4X110 MW Steam Turbine Output : 2X106 MW Net plant Output : 652 MW Water Consumption : 3.2 cusecs Beneficiary States : Uttar Pradesh , Jammu & Kashmir, Himachal Pradesh, Chandigarh , Rajasthan, Haryana, Punjab , Delhi & Uttranchal .

6. AURAIYA GAS POWER PLANT Major affecting conditions are ambient temperature, Barometric pressure and Power Factor at generator terminals . AuGPP has two combined cycle gas module each consisting of two gas turbines, waste heat recovery boilers (WHRB) and one steam turbine . The capacity of each Gas Turbine is 111.76 MW and that of Steam Turbine is 110 MW . Total capacity of each Module: 326 MW .

7. AURAIYA GAS POWER PLANT The AuGPP can be basically divided into two sub-plants:

8. MAIN PLANT The Main Plant consists mainly of the following componenets : Gas Turbines Steam Turbines Waste Heat Recovery Boiler Generators

9. Module-1 Module-2 220 KV SWITCHYARD FROM KANPUR TO AGRA (PGCIL)

10. GAS TURBINE Gas Turbine is a heat engine. In the Gas Turbine, the following processes take place: Compression of working medium (air) taken from atmosphere in a compressor. Combustion Increase of working medium temperature by constant pressure ignition of fuel in combustion chamber. Expansion of the product of combustion in a turbine.

11. APPLICATIONS OF GAS TURBINE Conventional applications are Simple cycle operation.  Combined cycle operation. Electric utility companies use gas turbine predominantly in simple cycle and combined cycle applications. Combined cycle operation is much efficient than open cycle operation.

12. STEAM TURBINE There are 2 steam turbines in number, present in the full AuGPP The two waste heat recovery boilers combined their output to one turbine . The turbine gets its feed from the low pressure (LP) and high pressure (HP) drums. The low pressure drums give its output directly to the turbine but the HP drums give its output to the supper heater and then to the turbine . In this way, steam turbine consists of two turbines – Low Pressure(LP) and High Pressure(HP) turbines. The steam turbine operates on Rankine cycle.

13. GAS TURBINES VS. STEAM TURBINES

14. GENERATOR Generator is three phases, two pole air cooled machine. The mechanical energy generated by turbine is converted to electrical energy by the generator and appear in the stator winding in the form of current and voltage. This balances the torque of the gas turbine. It lead the magnetic flux, and carries the field winding, the generator is self excited. The power required for the excitation is taken from the generator terminals and fed to the field winding through the excitation transformer and the thyristor - controlled rectifier units.

15. WASTE HEAT RECOVERY BOILER AuGPP is also known as Waste Heat Recovery Boilers ( WHRB) plant, which is of non-fired, dual pressure and forced circulation type. The boiler has two different water/steam cycle known as high-pressure system and low-pressure system . Components of WHRB The main components of the WHRB can be divided into following categories: LP Economizer LP Drum & Evaporator LP Super-heater HP Economizer HP Drum & Evaporator

16. HP evaporator LP evaporator HP economiser1 HP economiser2 HP superheater1&2 LP superheater LP economiser condensate preheater from HP feed pumps from LP feed pumps LP steam to LP turbine HP steam to HP turbine Flue gas gas turbine after HP boiler LP boiler drum drum Temp.505*C flue gas to atmosphere Temp.110*C HP and LP circulating pumps Temp.485*C Temp.225*C HP drum pressure 64bar LP drum 6bar pressure

17. SWITCHYARD It is a medium for exchange of power from source to load or from one source to another. It consists of switching equipment, measurement, protection and control equipment required for power generation and utilization. Some of the main components of Switchyard are: Circuit Breaker(CB) Isolator Current Transformer(CT) Capacitive Voltage Transformer(CVT) Lightning Arrester(LA) Wave Trap Earth Switch

18. SWITCHYARD There are mainly two sub-systems for the transmission of electricity in the Switchyard: 400 kV System 220 kV System

19. 400 kV SYSTEM Used for transmission with Agra and Kanpur. Contain s 2 Main Bus One and a Half Breaker Scheme 15 Bays

20. 400 kV BUS SCHEMES One and half breaker scheme Main Bus-2 Main Bus-1

21. 220 kV SYSTEM Used for transmission with Sikandara SS, UPPC Pata SS, Phaphund SS and Malanpur SS. Contains 2 Main Bus 1 Transfer Bus 24 Bays

22. 220 KV BUS SCHEMES 6 Generators 2 Stn.transformers Bus Coupler Transfer Bay 8 Transmission lines Transfer Bus Main Bus-1 Main Bus-2 Double main and Transfer bus scheme

23. ADVANTAGES OF GAS BASED PLANTS High Thermal Efficiency Low Water Requirements Environment Friendly Fast Start-Up Low Installation Cost

24. THANK YOU