Vilar dam

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Vilar dam
Barragem do Vilar (5986870739) .jpg
location
Vilar dam (Portugal)
Vilar dam
Coordinates 40 ° 59 '13 "  N , 7 ° 32' 8"  W Coordinates: 40 ° 59 '13 "  N , 7 ° 32' 8"  W.
country PortugalPortugal Portugal
place Moimenta da Beira , Viseu District
Waters Távora
Height upstream 552  m
power plant
owner Companhia Portuguesa de Produção de Electricidade (CPPE)
operator Energias de Portugal (EDP)
Start of planning 1958
Start of operation 1965
technology
Bottleneck performance 64 megawatts
Average
height of fall
432.5 to 461 m
Expansion flow 9 m³ / s
Standard work capacity 148 million kWh / year
Turbines Pelton turbines : 2 × 32.65 MW
Generators 2 × 40 MVA
Others

The Vilar dam ( Portuguese Barragem de Vilar or Barragem de Vilar-Tabuaço ) dams the Távora , a left (southern) tributary of the Douro , to a reservoir ( Portuguese Albufeira da Barragem de Vilar ). It is located in the northern region of Portugal in the Viseu district , about four kilometers east of the small town of Moimenta da Beira and about four kilometers north of the municipality of Vila da Ponte .

The project to build the dam began in 1958. The construction was completed in 1965. In addition to generating electricity, the dam is also used for flood protection. It is owned by the Companhia Portuguesa de Produção de Electricidade (CPPE).

Barrier structure

The barrier structure is a stone embankment dam with a height of 58 m above the foundation level (55 m above the river bed). The top of the dam is at a height of 555 m above sea level . The length of the dam crest is 240 m and its width 5.2 m. The volume of the structure is 300,000 m³.

The dam has both a bottom outlet and a flood relief with two gates, which is located on the right side of the dam. A maximum of 500 (or 540) m³ / s can be discharged via the flood relief. The design flood is 500 m³ / s; the probability of this event occurring has been determined to be once in 1,000 years.

Reservoir

With the normal storage target of 552 m, the reservoir extends over an area of ​​around 6.7 km² and holds 99.75 million m³ of water - of which 95.27 (or 95.5 or 96) million m³ can be used. With the usable 95.27 million m³ of water, 115.6 million kWh can be generated.

power plant

The Vilar-Tabuaço power plant is one of the smaller hydropower plants in Portugal with an installed capacity of 64 (or 58) MW . The average annual generation is 148 (or 123, 137.6 or 148) million kWh .

The two Pelton turbines with vertical shaft are located in a machine house, which is connected to the dam by a 15.6 km long penstock . They each provide a maximum of 32.65 MW and the associated generators 40  MVA . The rated speed of the turbines is 500 rpm. The generators have a nominal voltage of 11  kV . In the switchgear , the generator voltage is increased from 11 kV to 153 kV using power transformers.

The minimum height of fall is 432.5 m, the maximum 461 m. The maximum flow rate is 9 m³ / s.

The power plant is owned by the CPPE but operated by EDP .

See also

Individual evidence

  1. a b c d e VILAR DAM. APA Barragens de Portugal, accessed October 31, 2014 .
  2. a b c d e f Vilar-Tabuaço Informação Técnica. EDP , accessed October 31, 2014 (Portuguese).
  3. a b c d DECLARAÇÃO AMBIENTAL 2012. (PDF 16.1 MB pp. 30–31 (28–29)) EDP , accessed on December 20, 2014 (Portuguese).
  4. a b Hidroelectricidade em Portugal memória e desafio. (PDF 226 KB p. 30 (28)) Rede Eléctrica Nacional, SA (REN), accessed on December 20, 2014 (Portuguese).
  5. Vilar-Tabuaco Hydroelectric Power Plant Portugal. Global Energy Observatory, accessed October 31, 2014 .