San Gabán Hydroelectric Power Plant

Puno

Automation of the San Gabán I and San Gabán II Power Plants and their respective Substations.

The main activities were the following:

Feasibility study, basic engineering study. 1,200 m. of diamond drilling, including a 465 m inclined drill; as well as 100 m of exploratory tunnel.
Regulating reservoir with a useful volume of 140,000 m³ and a 428 m long bypass channel.
Pressure headrace tunnel of 7,045 m. long and 3.60 m. nominal diameter.
Powerhouse cavern of 51 x 18.60 m. base and 29 m. Tall. With two Pelton turbogenerator groups of 55 MW nominal power each.
Electricity market studies.
Transformer substation 138 kV, 125 MVA, in cavern, and insulated cables 138 kV, XLPE, exit to the outside; as well as the 138 kV San Gabán II switchyard; and the 138 kV Azángaro arrival substation (Puno).
Transmission Line San Gabán II – Azángaro 138 kV, double circuit, 160 km.
Environment Effect investigation.

Basic engineering studies, 600 m of diamond drilling were carried out.
Detailed engineering of the regulation hydraulic works: zoned fill dam 71 m high, 10 m wide and 410 m long, surface spillway with rapid channel and ski jump for 423m³/s and 316 m. long
Diversion and bottom discharge tunnel for 20m³/s, with valve chamber and 460 m long.
Service discharge tunnel and valve chamber, for 20 m³/s and 218 m long.
243 m long drainage gallery.
70 m long injection gallery.
Access gallery to valve chamber 185 m long.

Complete updating of the feasibility study, elaboration of basic engineering studies. 1,050 m were made. of diamond drilling and a 300 m exploratory tunnel.
Catchment and sand removal works for 22.6 m³/s in the San Gabán River.
Regulating reservoir with a useful volume of 94,000 m³ and a 171 m long bypass channel.
20 x 53 m powerhouse cavern. and 29 meters high. With 2 Pelton turbogenerator groups of 55 MW nominal power each.
138 kV transformer substation in cavern; including XLPE insulated cables at 138 kV for the exit to the outside; as well as the 138 kV San Gabán 1 Key Yard; and expansion of Patio de Llaves San Gabán 11 for interconnection with San Gabán 1; and Expansion of the 138 kV Azángaro Substation.