hydro power plant

A Seminar on Damodar Valley Corporation

6/08/2010

DVC INFRASTRUCTURE AT A GLANCE

DVC COMMAND AREA -24,235 sq.

kms.

POWER MANAGEMENT

Total Installed Capacity -2796.5MW

Thermal power station -four

Thermal capacity -2570MW

Hydel power station -three

Hydel capacity - 147.2

Sub-station -At 220 KV-11

- At 132 KV-

33

Transmission lines -At 220 KV-

1342 Ckt . Kms

-At 132 KV -

3419 Ckt . Kms

DVC POWER PLANTS NAME (Hydel) LOCATION EXISTING CAPACITY

Tilaiya River - BarakarDistrict - HazaribaghState - Jharkhand

4 MW( 2*2 MW)

Maithon River - BarakarDistrict - BarddhamanState - West Bengal

63.2 MW( 2*20 MW + 1*23.2 MW)

Panchet

Total Hydel

River - DamodarDistrict - DhanbadState - Jharkhand

80 MW( 2* 40 MW)

147.2 MW

DVC POWER PLANTS

NAME ( Thermal ) LOCATION EXISTING CAPACITY

Bokaro ‘B’ District - BokaroState - Jharkhand

630 MW( 3*210 MW)

Chandrapura District - BokaroState - Jharkhand

750 MW(3*130 MW) + (3*120 MW)

Durgapur District - BarddhamanState - West Bengal

350 MW( 1*140 MW) + ( 1*210 MW)

Mejia District - BankuraState - West Bengal

840 MW( 4*210 MW)

GENERATION OVERVIEW

• Power Generation

Entrusted with the responsibilities of providing the vital input power

for industrial growth in the resource rich Damodar Valley region,

DVC has been practically operating as a pioneer, using latest

available technologies to supply bulk power at reasonable rates to the

major industries.

• DVC has maintained its lead role in the eastern region by adopting

itself to the challenges of time and technology during the course of

last 59 years. DVC has been generating and transmitting power since

1953 and has succeeded not only in meeting the needs of consumers

but has also helped to increase the demand of power which itself is an

index of development.

Joint Venture Project

MAITHON POWER LIMITED a joint venture company by DVC and Tata

Power has been formed to implement 1000 MW Maithon Right Bank

Thermal Power Project for meeting the energy needs of power deficient

regions on export basis.

BOKARO POWER SUPPLY CO LTD (BPSCL) a joint venture company of

DVC and SAIL has been established to operate and maintain the captive

power and steam generation plant, hived off by SAIL and its Bokaro Steel

Plant and supply power and steam exclusively to Bokaro Steel Ltd.

DVC EMTA COAL MINES LTD, a joint venture company formed

with Eastern Minerals & Trading Agency for development and

operation of Captive Coal Mine Blocks and supply of coal exclusively

to DVC Thermal Power Projects of 10th and 11th plan.

TRANSMISSION SYSTEM• Charged with responsibilities of providing

electricity, the vital input for industrial growth in

the resource – rich Damodar Valley Region.

• DVC over the last 60 years has developed a big and

robust transmission network consisting of 132 kV

and 220 KV grids.

• DVC grids operates in unison with the eastern

regional grid through 132 KV and 220 KV tie lines.

• DVC power consumers are provided supply at 25

KV, 33KV, 132KV AND 220 KV pressure.

DVC POWER MAP

WATER SUPPLY

WATER FOR IRRIGATION:

•3.42,000 hectares of kharif crop,22,000 hectares of rabi crop and

30,000 hectares of boro crop are irrigated annually in the districts

of Bardhhaman, Hooghly, Bankura and Howrah in the state of

West Bengal.

•Water from DVC dams is regulated by the Durgapur barrage

through the existing network of 2494 kms of canals. This has

created irrigation potential for 3.64 lakh hectares of land annually.

•INDUSTRIAL AND CIVIC WATER PROVISION:

• About 625 cusec of water is released every year to meet the

demand of approximately 150 industries, civic bodies and railways

in Jharkhand and West Bengal.

WATER MANAGEMENT OVERVIEW

• DVC has a network of four dams – Tilaiya and Maithon on

river Barakar ,Panchet on river Damodar and Konar on river

Konar.Durgapur barrage and the canal network,handed over

to Government of West Bengal in 1953 remained a part of the

total system of water management.DVC dams are capable of

moderating floods of 6.51 cusec to 2.5 lac cusecs.

• Flood reserve capacity of 1292 mcm has been provided in 4

reservoirs which can moderate a peak flood. 18395 cumec to a

safe carrying capacity of 7076 cumec.

RESERVOIR OPERATION

• MONSOON OPERATION (JUNE-OCTOBER)

• A vast hydro meteorological station network with VHF/wireless

facilities exists over the Damodar catchment area.

• On real time basis {hourly,3 hourly,6 hourly} data of river gauge,

rainfall, river discharge are measured and transmitted through existing

communication network to central flood control station t maithon.

• Indian Meteorological Department (IMD) ,Kolkata transmit the rainfall

forecast for next 24 hrs. for the entire Damodar Valley region to

Maithon.

• Computer model available at Flood Forecasting Unit (FFU) at Maithon

estimates the inflow into the reservoir based on the real time data & the

rainfall forecast of IMD.

Type of plants :

MAITHON HYDEL POWER STATION

• Maithon Hydal Power Station is located

on the river Barakar 12.9 km above its

confluence with the Damodar near the

border of Dhanbad and Burdwan

districts of the state of Jharkhand and

West Bengal respectively. The unique

feature of this hydal power station is

that it is located underground in the left

bank of the river and is the first of its

kind in India. The Power station has a

total generating capacity of 60 MW

with 3 units of 20 MW each.

Main Elements Of Hydro power plant:

Hydropower to Electric Power

PotentialEnergy

KineticEnergy

ElectricalEnergy

MechanicalEnergy

Electricity

How Hydropower Works

Water from the reservoir flows due to gravity to drive the turbine.

Turbine is connected to a generator.

Power generated is transmitted over power lines.

How Hydropower Works (2)

A water turbine that cover the energy of flowing or falling water into mechanical energy that drives a generator, which generates electrical power. This is a heart of hydropower power plant.

A control mechanism to provide stable electrical power. It is called governor.

Electrical transmission line to deliver the power to its destination.

Sizes of Hydropower Plants• Pico hydroelectric plant

o Up to 10kW, remote areas away from the grid• Micro hydroelectric plant

o Capacity 10kW to 300kW, usually provided power for small community or rural industry in remote areas away from the grid

• Small hydroelectric plant o Capacity 300kW to 1MW

• Mini hydroelectric plant o Capacity above 1MW

• Medium hydroelectric planto 15 - 100 MW usually feeding a grid

• Large hydroelectric planto More than 100 MW feeding into a large electricity

grid

WATER TURBINE: water turbines are used to convert the energy of falling water into mechanical energy.

Spill Way: In order to discharge the water from the storage reservoir in to the river on the downstream side of the dam, Spillways are used. Spillways are constructed of concrete piers on the top of the dam.

In Take: A water intake must be able to divert the required amount of water in to a power canal or into a penstock without producing a negative impact on the local environment.

PENSTOCK: It is a closed conduit which connects the forebay or surge tank to the scroll case of the turbine.

Francis Turbine

Francis Turbines The inlet is spiral shaped. Guide vanes direct the water

tangentially to the runner. This radial flow acts on the

runner vanes, causing the runner to spin.

The guide vanes (or wicket gate) may be adjustable to allow efficient turbine operation for a range of water flow conditions.

Francis Turbines (continued…)

Best suited for sites with high flows and low to medium head.

Efficiency of 90%. expensive to design,

manufacture and install, but operate for decades.

Hydroelectric Power Plants in India

Tehri dam Binwa

Continued …

Bhakhra Nangal Nathpa Jakri

Continued…

Rangit Sardar Sarovar

THANKS FOR YOUR KIND ATTENTION