The Power Plant

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The Power Plant

Balance between energy generation and socio-environmental responsibility

Technical Data

HYDROMETEOROLOGICAL DATA

Drainage area:    184,219 km²
Average flow:    2,532 m3/s
Maximum registered flow (24/02/80):    28,558 m3/s
Minimum registered flow (19/10/94):    263 m3/s
Flood Flow (TR: 10,000 years):    49,870 m3/s

RESERVOIR    

Water level (WL) Normal Operating Amount:    212.00 m
Water level (WL) Maximum Amount:    212.60 m
Water level (WL) Normal Maximum Downstream:    187.20 m
Water level (WL) Exceptional Maximum Downstream:    201.50 m
Normal water level area:    630 km²
Normal water level volume:    5,19 billion m3
Expected lifespan:    100 years
Firm energy:    504 MW average
Average annual energy:    566 MW average
Guaranteed energy supply:    526,6 MW average
Extension:    170 km
Average Depth    8 m

DAMMING    

Total Length:    2,034.43 m
Maximum Height:    74 m
Crest level:    215 m

MAIN VOLUMES AND WEIGHTS
    

Rock excavation:    3,813,020 m3
Common excavation:    3,213,750 m3
Cofferdams:    2,038,170 m3
Earth/Rock Dams:    790,400 m3
Concrete:    1,243,074 m3
Cement:    286,000 t
Steel:    6,000 t

SPILLWAY
    

Number of gates:    14
Floodgates:    17m x23.30 m
Deviation flow:    26,160 m3/s
Project flow:    49,870 m3/s
Deviation:    with 6 lowered gates

GENERATOR UNITS    

Rated unit power:    180.5 MW
Rated flow of each unit:    700 m3/s
Net Fall:    29 m
Rotation:    100 rpm
Rated plant power:    902.5 MW
Number of units:    5
Type    Kaplan

ENTRY INTO OPERATION    

Generating Unit 1:    01.12.2001
Generating Unit 2:    01.03.2002
Generating Unit 3:    09.05.2002
Generating Unit 4:    30.07.2002
Generating Unit 5:    07.11.2002

Infrastructure

The Plant’s reservoir is surrounded by the municipalities of Miracema, Lajeado, Palmas, Porto Nacional, Brejinho de Nazaré, and Ipueiras.

RESERVOIR
    

Upstream water level:    212 m
Water fall:    29 m
Total Lake Area:    630 km²
Lake extension:    170 km
Average depth:    8 m

DAM    

Total length:    2,100 m
Maximum height:    74 m

SPILLWAY
    

Number of gates:    14
Floodgates:    17 X 23.5 m
Flow:    49,870 m3/s

Transmission System

All the electricity generated at HPP LAJEADO is conveyed through a 500 kw transmission line measuring 29.58 km which connects the Lajeado (Investco) and Miracema (Eletronorte) substations. From Miracema it is made available to the Brazilian Electrical System.

Monitoring Station

Both hydrological and meteorological monitoring are crucial to ensure the efficiency of hydro-powered production. An accurate forecast of the water volume that will reach the reservoir in the next few days and the monitoring of real-time events are crucial steps in the optimization of water resources.

Against this backdrop, and in order to support Lajeado HPP’s operational rules, eight (8) limnimetric ruler stations and eight (8) automatic stations were implemented in the reservoir’s area of influence and main tributaries.

Data collection

The whole forecasting, monitoring and hydroelectric operation control process begins with the collection of hydrological station data (measuring both river and rainfall levels).

Part of this data is gathered by automatic stations, which process sensor information and send it to the Plant every 15 minutes, using both satellite and Internet connections. Other information is obtained through telephone and radio contacts with local station operators, every day at 7 am and 5 pm.

STATION NAME RIVER NAME LAT. COORD LONG. COORD. TYPE
Angical-Downstream Tocantins 12º13’41” 48º24’14” FPS
Ipueiras Tocantins 11º14’49” 48º27’30” FPS
Jacinto Santa Tereza 11º59’03 “ 48º39’33” FPS
Fazenda Jurupari Tocantins 11º09’07” 48º31’00” FPS
Mangues Mangues 10º20’41” 48º38’05” FPS
Porto Jerônimo Manuel Alves da Natividade 11º45’28” 47º50’15” FPS
Lajeado HPP-Damming Tocantins 09º45’16” 48º22’01” FS
**Lajeado HPP-Downstream ** Tocantins 09º45’16” 48º22’01” FPS
PFP = Fluviometric and Pluviometric Station (river and rainfall levels)
PF = Fluviometric Station (river level)

Generation Data

With an installed capacity of 180.5 MW per generating unit, Luis Eduardo Magalhães HPP has a total installed capacity of 902.5 MW, which makes it possible to produce approximately 4,600,000 megawatt-hours per year, depending on the average availability of water in the Tocantins river.

GENERATOR UNITS    

NUMBER OF UNITS:    5
RATED POWER/UNIT:    180.5 MW
RATED FLOW/UNIT:    650 m3/S
ROTATION:    100 RPM
OVERALL INSTALLED CAPACITY:    902.5 MW

Financial Compensation for the Use of Water Resources - CFURH

The State of Tocantins and the municipalities affected by the implementation of the Luis Eduardo Magalhães reservoir receive a Financial Compensation for the Use of Water Resources. Investco gives ANEEL (National Electricity Agency) 6.75% of the energy produced by the plant. 0.75% of this sum goes to ANA (National Water Agency) and the remaining 6% is allocated as follows: 10% for the Union, 45% for the States of Tocantins and Goiás, and 45% for the municipalities affected by the reservoir in those two states. (*) The Tocantins municipalities that receive financial compensation are: Miracema, Lajeado, Palmas, Porto Nacional, Brejinho de Nazaré, Ipueiras, Aliança do Tocantins, and Santa Rosa do Tocantins. Figures are available on the ANEEL website.

(*) A small portion of these percentages is also allocated to the State of Goiás and the municipalities affected by HPP Serra da Mesa, since this is a regulatory plant for the outflow of several downstream plants, including Luis Eduardo Magalhães HPP.

For more information, visit www.aneel.gov.br.