1. L I NGAYA'S INSTT. OF MGT. AND TECHNOLOGY, FBD. THERMAL POWER PLANT OVERVIEW

2. OVERVIEW OF NTPC National Thermal Power Corporation Limited (NTPC) is the largest thermal power generating company of India. National Thermal Power Corporation Limited (NTPC) is the largest thermal power generating company of India. A public sector company owned by Government of India, it was incorporated in year 1975 to accelerate power development in the country. A public sector company owned by Government of India, it was incorporated in year 1975 to accelerate power development in the country. Within a span of 30 years, NTPC has emerged as truly national generating facilities in all the major regions of the country. Within a span of 30 years, NTPC has emerged as truly national generating facilities in all the major regions of the country.

3. NTPC has installed capacity of 29,394 MW. 15 coal based power stations (23,395 MW), 7 gas based power stations (3,955 MW) and 4 power stations in Joint Ventures (1,794 MW).

4. FPGS PLANT LAYOUT

5. BASIC WORKING OF THE PLANT The fuel (natural gas) is fed to the gas turbine. The fuel (natural gas) is fed to the gas turbine. Fuel is burnt in the gas turbines to release flue gases at high pressure and temperature, which rotates the shaft of the gas turbine. Fuel is burnt in the gas turbines to release flue gases at high pressure and temperature, which rotates the shaft of the gas turbine. The shaft of the turbine is linked to the rotor of the gas turbine generator, which leads to the production of electricity at two generators. The shaft of the turbine is linked to the rotor of the gas turbine generator, which leads to the production of electricity at two generators.

6. The flue gases produced in step 2 are passed to the waste heat recovery steam generators where it passes through super heaters, evaporators, economizers and condensate pre heater. The flue gases produced in step 2 are passed to the waste heat recovery steam generators where it passes through super heaters, evaporators, economizers and condensate pre heater. Water present and in the above devices absorbs heat from the hot flue gases and gets converted into high pressure and low pressure steam. Water present and in the above devices absorbs heat from the hot flue gases and gets converted into high pressure and low pressure steam. The high pressure steam generated in WHRSG is passed to HP turbine. The high pressure steam generated in WHRSG is passed to HP turbine.

7. The steam available at the outlet of the HP turbine and the LP turbine generated in the WHRSG are supplied to the LP turbine. In step 6 and 7 the steam supplied to the HP & LP turbines rotate the respective rotor of the turbine. Due to the rotation of the turbine rotors the rotor of generator also rotates thereby producing electricity at the generator. The main generating unit consists of the following equipments in the main plants as: - Two gas turbines One steam turbine WHRSG

8. VARIOUS DEPARTMENTS Water treatment plant Water treatment plant Control and Instrumentation [C&I] Control and Instrumentation [C&I] Electrical maintenance Electrical maintenance Mechanical maintenance Mechanical maintenance Information technology Information technology Safety and security Safety and security Human resource Human resource

9. WATER TREATMENT PLANT Softening process Softening process Chlorination process Chlorination process Dechlorination process Dechlorination process Ion exchange Ion exchange

10. Electrical Department It basically deals with these components -: GAS TURBINE [GT] GAS TURBINE [GT] There are 2 GT in FPGS. There are 2 GT in FPGS. STEAM TURBINE [STG] STEAM TURBINE [STG] There is one STG. There is one STG.

11. GAS TURBINE GENERATOR

12. Conditions at which GT works in INDIA 1 bar atm. Pressure 1 bar atm. Pressure 65% Humidity 65% Humidity 27 degree C Ambient Temperature 27 degree C Ambient Temperature GT Output 106 MW GT Output 106 MW Gas turbine Cycle are of two types Open cycle Open cycle Close cycle Close cycle

13. Cycles of generator Open Cycle -: In this type of cycle exhaust gases are directly sent to the atmosphere. Open Cycle -: In this type of cycle exhaust gases are directly sent to the atmosphere. Close Cycle -: In this cycle all the gases are continuously circulated through the system. It is neither taken from the atmosphere nor returned to it. Close Cycle -: In this cycle all the gases are continuously circulated through the system. It is neither taken from the atmosphere nor returned to it.

14. Diagram of closed cycle Diagram of closed cycle

15. COMBINED CYCLE POWER GENERATION USING GAS TURBINE AND STEAM TURBINE

16. GENERATOR The generators are used to convert mechanical power, delivered from the shaft of the turbine, into electrical power.

17. current running through a coiled wire could produce a magnetic field, then a magnetic field could induce (generate) a current of electricity in a coil of wire. By moving a magnet back and forth in or near a coil of wire, it created an electrical current without any other source of voltage feeding the wire.

18. A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors — the transformer's coils. A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors — the transformer's coils. In an ideal transformer, the induced voltage in the secondary winding (VS) is in proportion to the primary voltage (VP), and is given by the ratio of the number of turns in the secondary to the number of turns in the primary VS NS In an ideal transformer, the induced voltage in the secondary winding (VS) is in proportion to the primary voltage (VP), and is given by the ratio of the number of turns in the secondary to the number of turns in the primary VS NS ------- = -------- VP NP VP NPTRANSFORMERS

19. TYPES OF TRANSFORMER USED IN NTPC Depending upon the construction of magnetic core, transformers can be of two types: Core type transformer Shell type transformer. In NTPC only core type transformer is used. In a core type transformer the magnetic core is built up of laminations to form a rectangular frame.

20. What is MMI? M-Man M-Machine I-Interface All process information at single point. System of computers with real time software and associated special and general hardware components.

21. MAN-MACHINE INTERFACE STANDARD H/W AND S/W TO ENSURE BETTER CONNECTIVITY. HARDWARE FROM COMPAQ/DIGITAL, HP OR OTHER MAJOR SUPPLIERS (LESS DEPENDENCE ON THE C&I SYSTEM SUPPLIER ) OPERATING SYSTEM WINDOWS NT OR UNIX.

22. OPERATING TERMINALS It is a GUI based interface between operator and process All plant information is available on real time basis. Alarms, logs, History, trends for various plant parameters are available. All plant operations can be done through it.

23. Safety and security Electrical, mechanical safety rules. Safety rules for construction Emergency operating procedures during total power failure Start up and Shut down procedures Safety instructions are displayed what to do in case of emergency Chlorine gas leak detectors are installed in chlorination plants.

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