Mohit Malik, Archit Arora

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    SIX WEEKS INDUSTRIAL TRAININGAT

    NATIONAL THERMAL POWER CORPORATION

    NEW DELHI

    A Training ReportSubmitted in Partial Fulfillment of the

    Requirements

    For the Award of the Degree of

    BACHELOR OF ENGINEERINGIN

    ELECTRICAL AND ELECTRONICSTO

    GURU GOBIND SINGH INDRAPRASTHA

    UNIVERSITYNEW DELHI

    BYMOHIT MALIK

    (02415004909-Vth SEM)

    DEPARTMENT OF ELECTRICAL ENGINEERINGMAHARAJA SURAJMAL INSTITUTE OF TECHNOLOGY

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    NEW DELHI-110058November,2011

    ACKNOWLEDGMENT

    With profound respect and gratitude, I take the opportunity to convey my thanks tocomplete the training here.

    I do extend my heartfelt thanks to Mrs. Rachna Singh(DGM,HR) for providing me thisopportunity to be a part of this esteemed organization.

    I am extremely grateful to all the technical staff of BTPS/NTPC for their co-operationand guidance that helped me a lot during the course of training. I have learnt a lotworking under them and I will always be indebted of them for this value addition in me.

    I would also like to thank the training in charge of Maharaja Surajmal Institute ofTechnology and all the faculty member of Electrical & Electronics department for theireffort of constant co-operation. Which have been significant factor in theaccomplishment of my industrial training.

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    CONTENTS

    1. Introduction 1-10 NTPC 1 Badarpur Thermal Power Station 4

    2. Operation 11-15

    3. Electrical Maintenance Division-I 16-24 HT/LT Motors, Turbine & Boilers Side 16 CHP/NCHP 17 HT/LT Switch Gear 21

    4. Electrical Maintenance Division-II 25-31 Generator 25 Transformer & Switchyard 29

    5. Control & Instrumentation 32-43 Manometry Lab 32 Protection and interlock Lab 33 Automation Lab 34 Furnace Safeguard Supervisory System 42

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    Training at BTPS

    I was appointed to do six-week training at this esteemed organization from 13th June to

    23rd july 2011. In these six weeks I was assigned to visit various division of the plantwhich were

    1. Operation2. Control and instrumentation (C&I)3. Electrical maintenance division I (EMD-I)4. Electrical maintenance division II (EMD-II)

    This six-week training was a very educational adventure for me. It was really amazing to

    see the plant by your self and learn how electricity, which is one of our dailyrequirements of life, is produced.

    This report has been made by self-experience at BTPS. The material in this report has

    been gathered from my textbooks, senior student report, and trainer manual provided by

    training department. The specification & principles are at learned by me from the

    employee of each division of BTPS.

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    ABOUT NTPCNTPC Limited is the largest thermal 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. At present,

    Government of India holds 89.5% of the total equity shares of the company and FIIs,Domestic Banks, Public and others hold the balance 10.5%. With in a span of 31 years,

    NTPC has emerged as a truly national power company, with power generating facilities

    in all the major regions of the country.

    POWER GENERATION IN INDIA

    NTPCs core business is engineering, construction and operation of power generating

    plants. It also provides consultancy in the area of power plant constructions and power

    generation to companies in India and abroad. As on date the installed capacity of NTPC

    is 27,904 MW through its 15 coal based (22,895 MW), 7 gas based (3,955 MW) and 4

    Joint Venture Projects (1,054 MW). NTPC acquired 50% equity of the SAIL PowerSupply Corporation Ltd. (SPSCL). This JV Company operates the captive power plants

    of Durgapur (120 MW), Rourkela (120 MW) and Bhilai (74 MW). NTPC also has 28.33%

    stake in Ratnagiri Gas & Power Private Limited (RGPPL) a joint venture company

    between NTPC, GAIL, Indian Financial Institutions and Maharashtra SEB Co Ltd.

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    NTPC has set new benchmarks for the power industry both in the area of power plant

    construction and operations. Its providing power at the cheapest average tariff in the

    country.

    NTPC is committed to the environment, generating power at minimal environmental cost

    and preserving the ecology in the vicinity of the plants. NTPC has undertaken massive a

    forestation in the vicinity of its plants. Plantations have increased forest area and

    reduced barren land. The massive a forestation by NTPC in and around its

    Ramagundam Power station (2600 MW) have contributed reducing the temperature in

    the areas by about 3c. NTPC has also taken proactive steps forash utilization. In 1991,

    it set up Ash Utilization DivisionA "Centre for Power Efficiency and Environment Protection (CENPEEP)" has been

    established in NTPC with the assistance of United States Agency for International

    Development. (USAID). Cenpeep is efficiency oriented, eco-friendly and eco-nurturing

    initiative - a symbol of NTPC's concern towards environmental protection and continued

    commitment to sustainable power development in India.

    As a responsible corporate citizen, NTPC is making constant efforts to improve the

    socio-economic status of the people affected by its projects. Through its Rehabilitation

    and Resettlement programmes, the company endeavors to improve the overall socio

    economic status Project Affected Persons.

    NTPC was among the first Public Sector Enterprises to enter into a Memorandum ofUnderstanding (MOU) with the Government in 1987-88. NTPC has been placed under

    the 'Excellent category' every year since the MOU system became operative.

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    http://www.ntpc.co.in/operations/operations.shtmlhttp://www.ntpc.co.in/infocus/environment.shtmlhttp://www.ntpc.co.in/infocus/ashutilisation.shtmlhttp://www.ntpc.co.in/otherlinks/cenpeep.shtmlhttp://www.ntpc.co.in/infocus/socialcomm.shtmlhttp://www.ntpc.co.in/infocus/socialcomm.shtmlhttp://www.ntpc.co.in/infocus/environment.shtmlhttp://www.ntpc.co.in/infocus/ashutilisation.shtmlhttp://www.ntpc.co.in/otherlinks/cenpeep.shtmlhttp://www.ntpc.co.in/infocus/socialcomm.shtmlhttp://www.ntpc.co.in/infocus/socialcomm.shtmlhttp://www.ntpc.co.in/operations/operations.shtml
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    ABOUT BADARPUR THERMAL POWER STATION

    MAIN GENERATOR

    MAIN TURBINE DATA

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    Maximum continuous KVA rating 24700KVAMaximum continuous KW 210000KW

    Rated terminal voltage 15750VRated Stator current 9050 ARated Power Factor 0.85 lagExcitation current at MCR Condition 2600 ASlip-ring Voltage at MCR Condition 310 VRated Speed 3000 rpmRated Frequency 50 HzShort circuit ratio 0.49Efficiency at MCR Condition 98.4%Direction of rotation viewed Anti ClockwisePhase Connection Double Star

    Number of terminals brought out 9( 6 neutral and 3 phase)

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    ELECTRICITY FROM COAL

    Coal from the coal wagons is unloaded with the help of wagon tipplers in the C.H.P. thiscoal is taken to the raw coal bunkers with the help of conveyor belts. Coal is then

    transported to bowl mills by coal feeders where it is pulverized and ground in the

    powered form.

    This crushed coal is taken away to the furnace through coal pipes with the help of hot

    and cold mixture P.A fan. This fan takes atmospheric air, a part of which is sent to pre

    heaters while a part goes to the mill for temperature control. Atmospheric air from F.D

    fan in the air heaters and sent to the furnace as combustion air.

    Water from boiler feed pump passes through economizer and reaches the boiler drum .

    Water from the drum passes through the down comers and goes to the bottom ringheader. Water from the bottom ring header is divided to all the four sides of the furnace.

    Due to heat density difference the water rises up in the water wall tubes. This steam

    and water mixture is again taken to the boiler drum where the steam is sent to super

    heaters for super heating. The super heaters are located inside the furnace and the

    steam is super heated (540 degree Celsius) and finally it goes to the turbine.

    Fuel gases from the furnace are extracted from the induced draft fan, which maintains

    balance draft in the furnace with F.D fan. These fuel gases heat energy to the various

    super heaters and finally through air pre heaters and goes to electrostatic precipitators

    where the ash particles are extracted. This ash is mixed with the water to from slurry is

    pumped to ash period.

    The steam from boiler is conveyed to turbine through the steam pipes and through stop

    valve and control valve that automatically regulate the supply of steam to the turbine.

    Stop valves and controls valves are located in steam chest and governor driven from

    main turbine shaft operates the control valves the amount used.

    Steam from controlled valves enter high pressure cylinder of turbines, where it passes

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    Rated