BASIC DATA ON SANTA CLARA HYDROPOWER PLANT

THE COMPANY

In 1998, the Queiroz Galvão Group won the auction conducted by the Brazilian Electricity Regulatory Agency (ANEEL) for the concession of Santa Clara hydropower plant. It subsequently established a new company, Companhia Energética Santa Clara (CESC), to build and operate the new power generation project.

CONCESSION CONTRACT

ANEEL’s Concession Contract for Power Generation n. 190/98 was authorized by a Presidential Decree of 10 August 1998.

CONCESSION TERM

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

LOCATION

Northeastern Minas Gerais, Mucuri river basin

River Mucuri
Right bank municipality Nanuque - MG
Left bank municipality Serra dos Aimorés – MG / Mucuri - BA
Distance by road from Belo Horizonte 580 km
Distance by road from Nanuque 22 km
Coordinates 17º 53’ 48” - 41º 12’02”

 

MUCURI RIVER

 

Regulated Flow 38.80m³/seg
Flow, return period = 50 years 2,280m³/s
Flow, return period = 10,000 years 3,440m³/s

 

RESERVOIR

 

Drainage area 14,484 km²
Reservoir area (elevation 86.00) 7.3 km²
Maximum water level 87.32 m
Normal water level 86.00m
Total volume (elevation 86.00) 150.6 x 106
Active storage capacity 32.76 x 106

 

MAIN DAM

 

Type Roller compacted concrete (RCC)
Crest elevation 59.00 m
Crest width 4.5 m
Length 242 m
Maximum height 72 m

 

SPILLWAY

 

Type Surface spillway
Width 34.5 m
Discharge capacity 4,724 m³/s
Sill elevation 70.80 m

 

INTAKE PENSTOCK

 

Penstock 53.84 m

 

POWER HOUSE

 

Type Indoor, made of conventional concrete
Length 48.5 m
Width 19.50 m
Number of units 3
Overhead travelling crane 800/100KN

 

TURBINES

 

Type Francis, with vertical axis
Rated capacity 20.6 MW
Rotational capacity 257.14 RPM
Rotation direction Clockwise
Maximum net head 53.00 m
Minimum net head 50.70 m

 

GENERATORS

 

Rated capacity 21 MVA
Power factor 0.95
Frequency 60 Hz
Operating voltage 13.8 KV +/-5%
Rotational speed 257.14 RPM

 

SUBSTATION

 

Voltage 138 KV
Area 6,046 m²

 

ASSOCIATED TRANSMISSION SYSTEM

 

Length 20.2 km
Circuit Single 138 KV

 

INTERCONNECTION

 

System CEMIG
Substation Nanuque - MG

 

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