Power Generation Project

El Alto Hydroelectric Micro Plant

1.226 kW (IN OPERATION SINCE OCTOBER 2023)

EPC Contract (Engineering, Procurement, and Construction): comprehensive execution of civil works, installation of penstock piping, construction of the powerhouse structure, and design, manufacturing, supply, transport, assembly, testing, and commissioning of electromechanical equipment (turnkey project):

Technical Description of the Project:

  • Civil Works: Design and construction of the powerhouse, tailrace channel, substation, grounding network, and anchor blocks/saddles for the penstock.
  • Penstock: Supply, assembly, and commissioning of ASTM 516-70 steel piping with ASTM 572-50 supports and aeration pipe.
  • Steel Structure: Powerhouse with enclosures, gate, windows, staircase, ventilation grating, and hoist support structure.
  • Steel Gate: Design, supply, fabrication, transport, and installation of a gate measuring 3400” x 2500”.
  • Electromechanical Equipment: Horizontal Francis turbine, three-phase synchronous generator, intake valve, HPU unit, speed governor, SCADA system, and flow meter.
  • Auxiliary Electrical Systems: Transformer (0.48/13.8 kV), medium-voltage switchgear, interior/exterior LED lighting, and AC/DC distribution system.
  • Auxiliary Systems: Ventilation (exhaust fans), fire protection (detectors, extinguishers), drainage (pump and sensor), and overhead crane (10 t).
  • Substation and Communications: 13.8 kV line, fiber optic, 480 kVA service connection, telephony, IP CCTV, and short-circuit/protection studies.
  • SCADA Integration: Signal connection to the SCADA system of El Alto Hydroelectric Plant and Dominical Substation, with commissioning at the National Dispatch Center (CND).

Engineering and Supervision Services:

Project Management: Leadership, planning, and coordination of electromechanical activities, including progress monitoring and quality management in engineering, assembly, commissioning, and connection to the National Power Grid.

Electromechanical Engineering: Design and integration of equipment.

Quality Supervision: Equipment quality control, performance testing, and certification.

Project Features

FRANCIS TURBINE with horizontal shaft; runner mounted directly on the generator shaft; adjustable guide vanes; designed for the following parameters:

Parameter Symbol Value Unit
Maximum intake elevation 635 m.a.s.l
Nominal intake elevation 634 m.a.s.l
Minimum intake elevation 630 m.a.s.l
Turbine center axis elevation 601.525 m.a.s.l
Nominal tailrace elevation 600 m.a.s.l
Power plant latitude 8.778 °
Power plant water temperature T 10 °C
Maximum gross head Hbmax 35 m
Nominal gross head Hbn 34 m
Minimum gross head Hbmin 30 m
Maximum net head Hnmax 34 m
Nominal net head Hnn 33 m
Minimum net head Hnmin 28.6 m
Head loss coefficient k 0.0625 m/(m3/s)2
Specific speed Ns 381.7 rpm
Number of units Cant 1 pcs
Turbine flow rate Qt 4 m3/s
Water density rv 999.4 kg/m3
Gravity g 9.7797 m/s2
Runner outer diameter D 0.766 m
Speed N 720 rpm
Runaway speed Npob 1.710 min-1
Maximum turbine power Pmax 1.226 MW
Nominal turbine power Pnom 1.191 MW
Minimum turbine power Pmin 1.028 MW
Axial force Fr max 84 kN
Maximum radial force Fr max 10.5 kN