NTPC was set up in the central sector in the 1975 in response towidening demand & supply gap with the main objective of planning, promoting & organizing an integrated development tothermal power in India. Ever since its inception, NTPC has never looked back and the corporation is treading steps of success one after the other. The only PSU to have achieved excellent rating inrespect of MOU targets signed with Govt. of India each year.NTPC is poised to become a 40,000 MW gint corporation by theend of XI plan i.e. 2012 AD. Lighting up one fourth of the nation,NTPC has an installed capacity of 19,291 MW from itscommitment to provide quality power; all the operating stations of NTPC located in the National Capital Region & western haveacquired ISO 9002 certification. The service groups likeEngineering, Contracts, materials and operation Services havealso bagged the ISO 9001 certification. NTPC Dadri,Ramagundam, Vindhyachal and Korba station have also baggedISO 14001 certification.Today NTPC contributes more than 3 / 5th of the total power generation in India.

Station At GlanceNTPC dadri is model project of NTPC . also it tit the best projectof NTPC also known as NCPS ( National capital power station ).Situated 60 kms away from Delhi in the District of gautam budhNagar, Uttar Pradesh. The station has an installed capacity of 1669 MW of power 840 MW from Coal based units and 829MW Gas Based Station . the station is excelling in performanceever since its commercial operation . consistently in receipts of meritorious projectivity awards, the coal based units of the stationstood first in the country in terms of PLF for the financial year 1999 2000 by generating an all time national high PLF of 96.12% with the most modern O & M Practices. NTPC Dadri iscommitted to generated clean and green Power. The Station alsohouses the first HVDC station of the country (GEP project) inassociation with centre for power efficiency and Environmentprotection (CENEEP) NTPC & USAUID. The station hasbagged ISO 14001 & ISO 9002 certification during the financialyear 1999 2000, certified by Agency of International repute M/sDNV Netherlands M/s DNV Germany respectively

1.Introduction To Gas Power PlantsIntroductionThe development of the sector in the country, sinceindependence has been predominantly through the StateElectricity Boards. In order to supplement theeffects of the states in accelerating power development and to promote power development on a regional basis to enable theoptimum utilisation of energy resources, the Government of India decided to take up a programme of establishment of large hydro and thermal power stations in the central sec tor on a regional basis. With this in view, the Government set upthe National Thermal Power Corporation Ltd., in November 1975 with the objective of planning, construction,commissioning, operation and maintenance of Super Thermaland Gas Based Power projects in the country.The availability of gas in a large quantity in western offshoreregion has opened an opportunity to use the gas for power generation, which is an economical way and quicker methodof augmenting power generating capacity by natural gas asfuel in combined cycle power plant in a power deficit countrylike ours. With this intention in mind the Government asked NTPC to take up the construction of Kawas, Auraiya, Anta,Dadri and Gandhar Gas Power Project along the HBJ Gas pipe line.The power plant consists of gas turbine generating unitswaste heat recovery boilers, steam turbo generator, ancillaryelectrical and mechanical equipments. The power generate dat this power station is fed over 220 KV AC transmissionsystem associated with this project to distribute the power inthe various Regions.In the Power Sector, gas turbine drive generators are used.Gas turbines range in size from less than 100 KW up to about140.000 KW. The gas turbine has found increasing application due to the following potential advantages over competitive equipment. Small size and weight per horsepower Rapid loading capability Self-contained packaged unit Moderate first cost No cooling water required Easy maintenance High reliability Waste heat available for combined cycle application. Low Gestation Period Low Pollution Hazards The function of a gas turbine in a combined cycle power plant is to drive a generator which produce electricity and to provideInput heat for the steam cycle. Power for driving the compressor is also derived from gas turbine.Combined CycleCombined Cycle power plant Integrates two power conversion cycles namely.Brayton Cycle(Gas Turbines) andRankin Cycle(Conventional steam power plant) with the principal objective of increasing overall plant efficiency.Brayton CycleGas Turbine plant-operate on Brayton Cycle in which air is compressed this compressed air