NHPC

01. Industry profile

02.Company profile

03.Products and services

04.Functional units

05.SWOT Analysis

06.Conclusion

Industry profile

NHPC Ltd is a Mini-Ratna Category-I Enterprise of the Government of India. The company is one of the largest organisations in the field of hydro power development in the country. The company is a hydroelectric power generating company dedicated to the planning, development and implementation of an integrated and efficient network of hydroelectric projects in India. They execute all aspects of the development of hydroelectric projects, from concept to commissioning of the projects. NHPC Ltd was incorporated on November 7, 1975 as a private limited company under the name National Hydro Electric Power Corporation Pvt Ltd. In April 2, 1986, the company was converted into a public limited company. The company was established with an objective to plan, promote and organize an integrated and efficient development of hydroelectric power in all aspects. Later, they expanded their objects to include development of power in all aspects through conventional and non-conventional sources in India and abroad. During the year 1976-77, the company received Loktak hydroelectric project with a capacity of 105 MW from Government of India and in the next year, they received Baira Siul hydroelectric project with the capacity of 180 MW. In the year 1982-83, the company commissioned the Baira Siul power station in Himachal Pradesh. During the year 1983-84, the company commissioned all the units Devighat power station in Nepal and Loktak power station (105 MW) in Manipur. During the next year, they set up a Hydro Power Training Institute at the Baira Siul hydroelectric project to train operators and supervisory staff. During the year 1987-88, the company established a satellite telecommunication network up to link various projects. During the year 1989-90, the Government of India upgraded the company from a Schedule B to a Schedule A corporation. During the year 1992-93, the company set up a consultancy wing to provide a range of specialised services in the investigation, design, construction and operation of hydel projects. Also, they commissioned Tanakpur power station with the capacity of 120 MW in Uttarakhand. During the year 1995-94, the company commissioned Chamera I power station with the capacity of 540 MW in Himachal Pradesh. Also, the company was awarded the lining work of Jawahar Tunnel in Jammu & Kashmir during the year. During the year 1995-96, they signed an agreement for execution of Kurichhu hydroelectric project with the capacity of 45 MW in Bhutan. During the year 1997-98, the company commissioned the Uri power station with the capacity of 480 MW in Jammu & Kashmir and during the year 1999-2000, they commissioned Rangit power station with the capacity of 60 MW in Sikkim. During the year 2000-01, the company commissioned 45 MW Kurichhu power station in Bhutan. The company entered into an MoU with Government of Madhya Pradesh to exploit the hydro electric potential of the Narmada basin by completing the Indira Sagar and Omkareshwar projects. Also they entered into an MoU with Government of Jammu & Kashmir to exploit the power potential of the state. During the year 2003-04, the company commissioned the 300 MW Chamera- II power station in Himachal Pradesh. During the next year, NHDC, a joint venture company commissioned 1,000 MW Indira Sagar hydroelectric

project in Himachal Pradesh. During the year 2006-07, the company added 390 MW generating capacity with the commissioning of Dul Hasti Hydroelectric Project in Jammu & Kashmir. The company entered into an agreement with Government of Bhutan for preparation of DPR of Mangdechhu project with the capacity of 672 MW in Bhutan. During the year 2007-08, the company commissioned 510 MW Teesta-V power station. NHDC, the joint venture company commissioned 520 MW Omkareshwar hydroelectric project in Madhya Pradesh. The company entered into an MoA with the Government of Arunachal Pradesh to execute the Dibang multipurpose hydroelectric project. Also, they entered into an MoU with the government of Manipur to exploit the hydro electric potential of the tailrace discharge of Loktak Downstream Hydroelectric Project. During the year, the company signed an MoU with the Ministry of Rural Development, Government of India and Government of Bihar for construction of Rural Roads and the maintenance under Pradhan Mantri Gram Sadak Yogna in Bihar. The name of the company was changed from National Hydro Electric Power Corporation Ltd to NHPC Ltd with effect from March 28, 2008. The company was conferred with Mini-Ratna (Category I) status by the Ministry of Power with effect from April 28, 2008. During the year 2008-09, the company entered into an MoU with the Government of Jammu & Kashmir, JKSPDC and PTC to incorporate a joint venture develop the Pakal Dul and other hydro projects in the Chenab River Basin. Also, the company along with NTPC, PFC and Tata Consultancy Services Ltd incorporated a joint venture company, namely National Power Exchange Ltd. During the year 2009-10, the company along with NTPC, Powergrid Corporation of India Ltd and Damodar Valley Corporation incorporated a joint venture company, namely National High Power Test Laboratory Pvt Ltd. In January 8, 2010, the company signed an agreement with Ministry of External Affairs (MEA), Government of India for taking up Additional Investigations and Preparation of Updated Detailed Project Reports for 1200 MW Tamanthi HE Project and 642 MW Shwezaya HE Project in Myanmar. In March 23, 2010, the company has signed an agreement with Department of Energy, Royal Govt. of Bhutan for providing engineering & consultancy services relating to pre-construction activities of Mangdechhu Hydroelectric Project (720 MW) in Bhutan at a total cost of Rs. 11.67 crore. In April 28, 2010, an MoU was signed amongst NHPC Ltd, Government of Manipur and SJVN Ltd for formation of a joint venture company for implementation of 1500 MW Tipaimukh Hydroelectric (Multipurpose) Project in Manipur. NHPC Ltd, SJVN Ltd and Government of Manipur shall have a share holding of 69%, 26% and 5% respectively. The Unit-I of SEWA-II HE Project started commercial operation with effect from June 29, 2010. Also, the SEWA-II H.E. Project (120 MW) started commercial operation with effect from July 24, 2010, consequent upon successful trial run of balance Unit-II (40 MW) of the Project. The company is currently engaged in the construction of 11 additional hydroelectric projects, which are expected to increase the total installed capacity by 4,622 MW. Also, the company is awaiting the Government sanction for a further five projects with an anticipated capacity of 4,565 MW.

Company profile

NHPC ltd. Formerly known as National Hydroelectric Power Corporation ltd. Was estd. In 1975 as a Government of India owned company under companies act 1956 to undertake development of hydroelectric power in the central sector covering all aspects such as investigations, planning designs, construction ,operation and maintenance of hydroelectric projects. Now NHPC is a mini Ratna Catagory-1 enterprise of the Govt. of India with an authorized share capital of Rs.15,000 cr and an investment base of about Rs.40,471 cr. NHPC is ranked as a premier organization in the country for development of hydropower. The company successfully concluded its IPO worth over Rs.6,000 cr and became listed company on NSE and BSE with effect from 1st September 2009.

The company is accredited with integrated Management System in compliance with PAS 99:2006 for the requirement of ISO 9001:2008,ISO 14001:2004 and OHSAS 18001:2007 for its quality, Environmental and Occupational Health and Safety Management System.

Total installed capacity of the power stations owned by NHPC is 5295 MW (including ISP and OSP Project jointly owned with Government of Madhya Pradesh , in which NHPC is the Major stake holder) and 23 states/ union territories of India receive power from NHPC power stations. New hydroelectric power projects having aggregate capacity of 4502 MW are under implementation in different parts of India by NHPC .Subansiri Lower hydroelectric project is one of such projects.

Project background

Subansiri Lower H.E . project was transferred to NHPC by Ministry of Water Resources and Ministry of power during year 2000. TEC to the project has been accorded during year 2003

The project is being executed under the following work packages by different agencies:

Lot SSL 1(Package for which CAR policy is to be taken):The package is related with Dam and appurtenant works . The Contractor for the work is M/s BGS –SCS-SOMA JV..M/s BGS and SGS are Russian Companies and M/s SOMA enterprise is an Indian company based in Hyderabad .As on 1st March ‘2011 about 40% work have been completed . The details of the works under this lot are as below :-

Construction of 5 nos . 9.5 m diameter horse shoe shaped diversion tunnels including inlet and outlet structures ,nallah training works and plugging of tunnels on completion of Dam works.

Construction of upstream and downstream Earthfill /Rockfill cofferdams of height 31 m and 21 m respectively including maintenance and removal of cofferdam on completion of dam work.

Construction of 116 m height (above the sea bed level) concrete gravity dam 271 m long at top including 117.5 m long gated orifice type spillway.

Construction of 64 m X 167.5 m performed plunge pool. Construction of 50 m deep 410 m long cut off wall below the dam foundation.

Lot SSL 2: Related to Civil works of Intake Structure, water conductor system, power house and appurtenant works is being executed by measures L&T.

Lot SSL 3: Related to Hydro Mechanical works of the Project is being executed by M/s ALOSTOM.

Lot SSL 4: Related to Surge Tunnels of the Project is being executed by M/s L&T.

Lot SSL 5:Related to Hydro Mechanical works of the Project is being executed by M/s Texmaco.

Expected time of completion for Lot SSL-1 is December, 2013 and for the Project as a whole is August 2014.

1.3 Project Layout

Subansiri Lower HE Project envisages utilization of 91 m of maximum gross head by construction of 127 m high concrete gravity dam above deepest foundation level.Water is led to powerhouse through 8 nos. 9.5 m diameter headrace tunnel. The powerhouse is proposed to house 8 units of 250 MW each. The design energy works out to be 7421.59 MU

2. DESCRIPTION OF PROJECT COMPONENTS

2.1 Dam

Considering the topographical details and provision of low- level orifice type spillway, a 116 m high concrete gravity dam is planned above river bed level . the deepest foundation level is at E1 83 m and top of the dam at E1 210 m. The length of the dam at top will be 271 m including 175.5 m for spillway. For construction of the dam, river Subansiri shall be diverted through five numbers horse shoe shaped diversion tunnels each of 9.5 m finished diameter provided on left bank .For river diversion proposed upstream and downstream cofferdams shall be of 31 m and 21 m height respectively.

2.2 Water conductor system

2.2.1 HRT intake structure

The HRT intake structure are located on right bank of the river to suit topography. This comprise of 8 numbers of vertical intakes , one of each head race tunnel .The intake structure of four intakes have been clubbed and hence two sets of intake structures have been plant .

2.2.2 Head race tunnels

Eight no. of 9.5 m finished diameter horseshoe shaped Head Race Tunnel(HRT) are envisaged to convey water from intake to eight pressure shaft and then to power house .

2.2.3 Surge Tunnels

Eight nos. Of diameter 9.5 circular / horse shoe shaped having varying length of 402 m to 485 m

2.2.4 Pressure shaft

Eight nos. Of pressure shaft feeding individual unit has been proposed . Pressure shaft have horizontal limbs of size 9.5 m (horseshoe ) /8 m (circular) at E1 155.75 m.The steel lined bottom horizontal limb of pressure shaft at E1 98 m has size 8 m (circular). Top and bottom horizontal limbs are proposed to be joined by a vertical steel lined 8 m diameter circular shaft.

2.3 Power House

Surface power house having overall size 285 m X 61 m X 64 m has been proposed .MIV value is proposed to be located at EL 88m on the u/s side of machine hall. Controlled block ,transformers as well as GIS have been located on various floors between machine hall and draft tube gates. The transmission conductor shall take off from powers over roof of GIS floor . As such no separate Switch yard area has been proposed .

2.4 Tail Race Tunnel

A tail race channel having width of 206 m has been provided to lead water from power house to river.

3.0 SALIENT FEATURES OF THE PROJECT

The salient features of the project are enclosed.

4.0 Location and status of access roads of sites project:

Subansiri Lower HE project (2000 MW) is located in Dhemaji and Lower Subansisi districts in Assam and Arunachal Pradesh. The left bank of Dam will in the state of Assam and right bank of the Dam,Power House, Headrace Tunnel and tailrace channel etc. will be in the state of Arunachal Pradesh. The projects township and Headquarter are located at gerukamukh ,district :dhemaji,state:Assam which is situated at a distance of 16 kms from gogamukh a road side town on national Highway-NH 52. Gogamukh is about 455 kms from Guwahati and 40 km from north Lakhimpur a district headquarter which is about 415 km from Guwahati. The nearest meter gauge railhead is Gogamukh and broad gauge railhead nawgaon situated in between north Lakhimpur & Guwahati on NH-52 which is about 350 kms away from project headquarter. Presently the Airports are located at Guwahati and lilabari (North Lakhimpur), which are well accessible to various other airports located in India. In addition to above helicopter services are available from Guwahati to Naharlagun (Arunanchal Pradesh),which is situated about 100 km away from project headquarter. The access from Gogamukh to project headquarter is all weather double lane road.

PRODUCTS AND SERVICES

3 core submersible flat cables

3 Point Locking Mechanism

AC boxes

ac contactor

Ac Drives

Ac Motors

AC plug & Sockets

ac-dc switching power supply

acb panels

Acutators

Adapters

Adaptors

agricultural pump sets

air break switches

alluminium chokes

alternators

Aluminium Compact Chokes

aluminium crepe paper

amplifier

Amplifiers

Analog & Digital Temperature Controllers

anchor switches & accessiores

annunciator panels

Antenna

Auto flush

Auto tap

auto variable transformers

Automatic Generator Panels [AMF]

Automatic power factor control relay

automatic street light switching panels

automatic voltage stabilizers

Automation Products

Axial Flow Ventilator

Bank Token Display

battery accessories

battery discharge resistor

battery plates

Bench Drills

beryllium copper

Bi-metal sheets

BLB Tubes

Boiler Fans

Brass Glands

brass precision components

brass sanitry ware items

Breakers

bulb caps

Bulbs

buzzer bell

Cable Accessories

cable blowing machines

Cable Duct

Cable Ends

Cable Glands

Cable Jointing Machines

Cable Lugs

Cable Networks

cable pulling devices

Cable Racks

Cable Terminations

Cable Trays

Cables

cadmium copper wire

camcorder batteries

can spray paint

capacitor panels

Capacitors

Carbon Brush

cast resin transformer

CCI

Ceiling fan stampings

Ceiling Fans

ceiling light

Ceiling light fixture

Centrifugal Pumps

Centrifugal Ventilator

cfl fittings

change over panels

Change over switch

Change overs

Changeover

Changers

Chargers

Chokes

Circuit breaker

Circuit Breakers

Circuit protector

Co-axial cable

Compact Flourscent Lamp

Computer cables

contactor

control & relay panels

Control Gears

Control Panel Accessories

Control Panels

control relay

Control transformers

converter

Copper Cables

copper chokes

Copper Compact Chokes

Copper Flats

Copper Foils

Copper Lugs

Copper Roll

Copper Strips

copper wire

crepe paper

crgo lamination

Crimping Tools

cross arms

cubicle

Current Transformer

custom built chargers

Custom Control panels

cylindrical battery

D.C regulated power supply

D.o.fuses

Dc Adaptors

dc Drives

Dc Drives

Dc Motors

Decorative Fittings

Decorative Lamps

delton telephone cables

demagnetisers

demand controllers

DG SET

diesel generator

diesel pumps

diesel pumpsets

digital camera batteries

digital meters

Digitally Controlled Industrial Heaters

disc insulators

dispenser pumps

Distribution Boards

Distribution Transformer

domestic pump sets

Down lights

Dryers

duplex receptacle

Dynamometer

Earth & Neutral links

Earth Leakage Circuit Breaker

Earthing Plates

Earthing Rods

Earthpits

Electric Accessories

Electric Cables

Electric Chokes

electric coconut tree

Electric Equipment

electric generators

electric heating elements

Electric irons

electric kettle

Electric Laminations

Electric Motors

electric palm tree

Electric Panels

electric water fountain lights

Electric Welders

electrical ceiling fans

Electrical Fittings

Electrical Accessories

Electrical Appliances

Electrical Audit

electrical bells

Electrical cables

Electrical consulting

Electrical Contractor

Electrical Contractors

Electrical Control Panels

Electrical Design Consultancy

Electrical Distribution System

electrical distribution transformers

Electrical Heating Equipment

Electrical Instruments

Electrical Insulation Material

Electrical Items

electrical panels

Electrical Stampings

Electrical Switch boards

Electrical Switchgear

Electrical work

Electrification

electro mechanical impulse counter timer

Electromechanical Components

Electromechanical Meters

Electronic bell

Electronic Earth Fault Relays

Electronic Items

electronic meters

Electronic Over Load Relays

Element

Eliminators

elmek cables

emergency lamp

Emergency Light

Enamelled wires and Strips

Enclosures

Encoders

Energy Audit

Energy Meter

Energy Saving Lamp

EPS

EV Motors

Exhaust fan stampings

Exhaust Fans

Extension socket

fabricated mica parts

Fan Heaters

fan plates

fan regulators

Fault display annunciators

fedder pannel

feeder pillars

fhp elecric motors

fiberglass sleeving

Fire Fighting Panels

firework lights

fish bell

fitting chokes

Flameproof Chemical Heaters

Flash Lights

flexible cables & wires

Flexible Electric Conduits

Flood Lights

Florescent Chokes

Fluorescent Lamps

Frequency Meters

furnace heater

fuse

Fuse Bases

Fuse careers

FuseGear

Fuses

garden light

Gas Lanterns

gas oil pumps

Gas Water Heater

Gasoline engine

gasoline generator

Geared Motors

generator spares

Generators

Gensets

Germicidal

gi barrelnipple

gi fittings

gi gate valve

Gland

golf cart chargers

gong bell

grilled sandwich toasters

Grinder

Grinding wheel machines

hair dryer elements

halogen flood light

Halogen Free Wires

Halogen Lamp

Hand Blenders

Hand dryer

Hand Pumps

Hardware

hardware parts

heat shrinkable cable accessories

Heating wire

Hg fuses

hi tech heaters

High temperature Cable

High Voltage CR Cable

Hooters

horn gap fuses

Hose Pumps

House Wiring

hpsv & hpmv ballast

hrc fuses

Ht Capacitors

Ht Switchgears

ht xlpe cable

Humidifiers

Hv and lv components

Hydraulic Motors

Hydraulic Pumps

IC cutouts

Indicators

Induction Motors

Industrial Batteries

Industrial electrical Motors

Industrial Heaters

industrial plug & socket

industrial pump sets

Industrial Wiring

Infra Red Lamp

Innovators

Installation

Instant Start Lamps

Instrument Enclosures

Instrumentation Panels

Insulating Switches

Interactive Terminals

inverter

Iron boxes

iron elements

Isolation Transformer

Kapton wire

kerosene pumps

kettle elements

lamp components

Lamps And Fittings

Laying

Lead glass tubing

leader modular switches

leakage dc current sensor

Led lights

led torch lights

Level Gauges

Light Fixtures

light sources

Lightening Arresters

Lightening Protection Equipments

lighting fixtures

Lighting Poles

Lights

lightweight irons

load banks

load cell

Locking Handles

low voltage switchgear

lt pvc control cables

lt xlpe control cables

lt xlpe power cables

Lugs

Magnehelic Guage

Main switch

main-line stabilizers

manual pumps

mcb

MCB boxes

Mcbs

mccb

Mcp

Measuring Instruments

Medical Heating Pads

mercury lamp

Mercury Vapour Lamp

metal halide

Metal Halide Lamp

meter

Meter Components

Meters

mica flake

mica insulators

mica parts

mica powder

mica spacers

mica tube

mica washer

Micro Motors

micro motors

microcntroller based shock guard

microcontroller based digital inverter

microcontroller based stabilizer

Mini circuit Breaker

Mini Modular

miniature circuit breaker

mirror optical fittings

Mixed Flow Blower Fans

mixer

modular boxes

Modular Switches

Modulators

Monoblock Pumps

Monoblock stampings

Motor Rewinding

Motor Stamping

Motor Starter

Multicore cables

Multistrand Wires

muscovite

mytel fan stampings

Neon Lamp

neutral grounding resistor

ni-mh button cell

ni-mh prismatic battery

Nylon Cable Tie

ocb panels

ocb spares

Offline Ups

Oil Filled Radiators

Oil Filteration

Oil immerssed transformer

Optical fibre cable

Osram lamps

osram lighting

OTG

Outdoor Gas Heaters

Overlays

P.B. Wires

p.V.C ball valve

Panel Accessories

panel board

Panel Boxes

Panel meter

panels

Patio Heaters

PB Sheets

petrol engine

phalogophite mica sheets

phase boards

Photovoltaic Gadgets

photovoltaic modules.

Pilot Lamp

Pin inset

pin insulators

plastic round plates

plastic safety plug

plastic square box

Pole Line Hardware

pole mounted transformer

Poles

polycarbonate components

Portable Genset

portable petrol generator

Power Cabels

power control cables

Power Control Equipment

Power Cord

power saving heaters

Power Transformer

precision turning jobs

Project Consultancy

Projection Lamp

Protection Systems

PS Motors

PTFE insulated Wires and Cable

Pumps

push button

Push button Switch

Push Buttons

Pvc Channels

PVC Compounds

Pvc Insulated Cables

PVC insulated wires

Receivers

rectangular cores

RECTIFIER

Reflector

Relay

relay logic controllers

Renewable energy systems

Repeaters

residual current circuit breaker

Resonant Test Systems

Reverse forward switch

Rg coaxial cables

Rigid PVC Pipes

Rocker switch

room heaters

Rotameters

Rotary Pumps

Rotary switches

Rotary Vibrators

Roti Maker

rotor starters

RTD cable

Rubber profiles

s type beam load cell

safety switches

Satellite Receivers

Saturable Core Reactors

Sectionalizers

security Fire Alarm

Semaphore indicators

semi conductor fuses

Semitraction motors

Sensors

sepex motors

service metal enclosure

servo control voltage stabilizers

Servo Motor

Servo Stabilizer

servo voltage stabilizers

Shielded cables

Shoe shine machine

Shrouds

Signaling Equipment

single phase transformer

Single Phasing Preventors

single point miniature load cell

single point table top load cell

Slim tube fitting patti

Slip Rings

smps power plant

Smps telecom rectifier

socket

sodium lamp

Sodium Vapour Lamp

Soft light range

soft starting reactor panels

Solar ceiling

Solar cell panels

solar garden lights

solar garden lights

Solar Geysers

solar home lighting system

Solar home lights

solar lantern

solar lighting system

Solar Power lights

solar power packs

Solar Products

solar pulse charge controllers

solar street light

Solar systems

solar torches

solar traffic signals

solar water pump

Soldering Material

solenoids

speed controllers

Splitters

sprayer

Stabilizers

stainless steel hotpot

stainless steel lighting

stand fans

standard testing equipments

Stardelta motor starter

Starters

step cores

Stepper motor

Stepper motor counter

stepper motors

sterio bell

Streeps Paltys

Street Lighting

Strip connector

Studio Lamp

Submarine Cable

Submersible Flat Cables

Submersible Pumps

submeters

Substation Projects

Substation works

Sumbersible pumps

Surge Arrestor

Surge comparison testing

SV Lamps

switch fuse unit

switches

Switchgear

switchgear parts

Switchgears

Synchronous motor

Syncronising Panels

synthetic ropes

T5 Fixtures

table

Table fan stampings

Table Fans

Tan-delta measurement

Teflon sleeve

telephone jelly filled cables

telephone junction box

Temperature Indicators

Terminals

Terminations

Testing

thermal wire stripper

Thermocouple Cable

thermoelectric fridges

Thermometers

Thermostat

three phase transformer

thyristors

tinned copper wire

toaster elements

tools brass cable

Toroids

Transducers

Transfer Switches

transformer

Transformer Oil

transformers

Transmitters

Tubelight

tubelight fittings

tubular heating elements

tungsten Wire

Turbines

Ultra Violet Tubes

ultra-high accuracy current sensor

Ultraviolet Lamp

Unarmoured Cables

ups

Vacuum Switches

ventilation fans

Vibration Switches

Voltage Products

Voltage Stabilisers

Vpit Ballast

Wall mounted Lights

wall plates

water cooler

water heaters

water lifting pump

Water Pump Set

Weatherproof Switchgear

Welding Generators

welding machine

welding machines

wheel chair chargers

Wind Turbines

Wiring Accessories

Wiring work

Y Series Electric motors