BASIC DATA ON QUEBRA QUEIXO HYDROPOWER PLANT

THE COMPANY

On 4 August 2000, Construtora Queiroz Galvão S/A and Construtora Barbosa Mello S/A formed a new company, Companhia Energética Chapecó (CEC), to build and operate Quebra Queixo hydropower plant, with the following shareholding ratio: Construtora Queiroz Galvão S/A - 59%; Construtora Barbosa Mello S/A - 41%.

CONCESSION CONTRACT

The Concession Contract for Power Generation n. 94/2000 of the Brazilian Electricity Regulatory Agency (ANEEL) was authorized by a Presidential Decree on 14 November 2000.

CONCESSION TERM

Thirty-five years from the date of signature of the Contract for Public Utility Concession.

LOCATION

Northwestern Santa Catarina, Uruguay river basin

River Chapecó
Right bank municipality São Domingos-SC
Left bank municipality Ipuaçú-SC
Distance by road from Florianópolis 500 km
Distance by road from Ipuaçú 13 km
Coordinates 26º 40’ south - 52º 33’ west

 

CHAPECÓ RIVER

 

Regulated flow 38.80m³/s
Flow, return period = 50 years 2,280m³/s
Flow, return period = 10.000 years 3,440m³/s

 

RESERVOIR

 

Drainage area 2,670km²
Reservoir area (elevation 549.00) 5.60 km²
Maximum water level 553.27m
Normal water level 549.00m
Total volume (elevation 549.00) 136,630 x 10³ m³
Active storage capacity 25,520 x 10³ m³

 

MAIN DAM

 

Type Concrete-face rockfill
Crest elevation 553 m
Crest width 7 m
Length 720 m
Maximum height 72 m

 

SPILLWAY

 

Type Lateral, free-sill
Width 270 m
Discharge capacity 5,000 m³/s
Sill elevation 553.00 m

 

INTAKE PENSTOCK

In underground rock with reinforced concrete and steel lining.

Length of headrace tunnel 336.95 m
Length of vertical tunnel 59.61 m
Length of pressure tunnel 376.05 m

 

POWERHOUSE

 

Type Indoor, made of conventional concrete
Length 30.15 m
Width 54.50 m
Number of units 3
Overhead travelling crane 850/50KN

 

TURBINES

 

Type Francis, with vertical axis
Rated capacity 40.5 MW
Rotational capacity 400 rpm
Rotation direction Clockwise
Maximum net head 131.00 m
Minimum net head 117.30 m

 

GENERATORS

 

Rated capacity 45 MVA
Power factor 0.90
Frequency 60 Hz
Operating voltage 13.8 KV +-5%
Rotational speed 400 rpm

 

SUBSTATION

 

Voltage 138 kv
Area 4,209 m²

 

ASSOCIATED TRANSMISSION SYSTEM

 

Length 54 km
Circuit Double 138 kv

 

INTERCONNECTION

 

System CELESC
Substation Pinhalzinho – SC

 

Photo Gallery