Torrão dam

Torrão dam
	location
Coordinates	41 ° 5 ′ 51 ″ N , 8 ° 15 ′ 40 ″ W Coordinates: 41 ° 5 ′ 51 ″ N , 8 ° 15 ′ 40 ″ W
country	Portugal
place	Porto District
Waters	Tâmega
Height upstream	65 m
	power plant
owner	Companhia Portuguesa de Produção de Electricidade (CPPE)
operator	Energias de Portugal (EDP)
Start of planning	1979
Start of operation	1988
	technology
Bottleneck performance	146 megawatts
Average ; height of fall	35.5 to 53 m
Expansion flow	161 m³ / s
Standard work capacity	228 million kWh / year
Turbines	Francis turbines : 2 × 73 MW
Generators	2 × 80 MVA
	Others

The dam Torrão ( Portuguese Barragem de Torrão ) is located in the northern region of Portugal in the district of Porto . It dams the Tâmega , a right or northern tributary of the Douro . The Tâmega River flows into the Douro a little downstream from the dam. The national road ( Portuguese Estrada Nacional ) 312 leads over the dam. The municipality of Várzea do Douro is located about two kilometers southwest of the dam.

The project to build the dam began in 1979. The construction was completed in 1988. The dam is used to generate electricity. It is owned by the Companhia Portuguesa de Produção de Electricidade (CPPE).

Barrier structure

The barrier structure is a concrete gravity dam with a height of 69 (or 70) m above the foundation level . The top of the dam is at a height of 69 m above sea level . The length of the top of the wall is 218 m and its width 8.35 m. The volume of the structure is 224,415 (or 242,000) m³.

The dam wall has both a bottom outlet and a flood relief . A maximum of 250 m³ / s can be discharged via the bottom outlet, and a maximum of 4,500 m³ / s via the flood discharge. The design flood is 4,150 m³ / s; the probability of this event occurring has been determined to be once in 500 years.

Reservoir

With a normal storage target of 65 m (maximum 65 m during high water), the reservoir extends over an area of around 6.5 km² and holds 124 million m³ of water - 77 (or 22) million m³ of this can be used to generate electricity. The minimum congestion destination at which the machines can still be operated is 49 m. With the usable 22 million m³ of water, 10 million kWh can be generated. The reservoir extends over a length of 31 km.

power plant

The Torrão pumped storage power plant is one of the largest hydropower plants in Portugal with an installed capacity of 146 (or 140 or 144) MW . The average annual generation is 228 (or 221, 222.3 or 254) million kWh .

The machine house is located in a cavern. The two Francis turbines of the power plant each have a maximum of 73 (or 73,150) MW and the associated generators 80 MVA . The nominal speed of the turbines is 125 / min. The pumps each have a maximum output of 73.3 MW; a pump can transport a maximum of 163 m³ / s. The generators have a nominal voltage of 10 kV . In the switchgear , the generator voltage of 10 kV is increased to 230 kV using two three-phase power transformers.

The minimum height of fall is 35.5 m, the maximum 53 m. The maximum flow is 161 m³ / s.

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

Web links

Commons : Barragem de Torrão - collection of images, videos and audio files

Individual evidence

↑ ^a ^b ^c ^d ^e TORRÃO DAM. APA Barragens de Portugal, accessed December 18, 2014 .
↑ ^a ^b Torrão dam. Structurae International Database for Structures and Civil Engineers, accessed December 18, 2014 .
↑ ^a ^b ^c ^d ^e ^f ^g Torrão Informação Técnica. EDP , accessed December 18, 2014 (Portuguese).
↑ ^a ^b ^c ^d Central do Torrão. (No longer available online.) Museu da Electricidade, archived from the original on October 6, 2014 ; Retrieved December 18, 2014 .
↑ ^a ^b ^c Torrao Hydroelectric Power Plant Portugal. Global Energy Observatory, accessed December 18, 2014 .
↑ ^a ^b DECLARAÇÃO AMBIENTAL 2012. (PDF 16.1 MB pp. 33–34 (35–36)) EDP , accessed on December 18, 2014 (Portuguese).
↑ ^a ^b Hidroelectricidade em Portugal memória e desafio. (PDF 226 KB p. 29 (27)) Rede Eléctrica Nacional, SA (REN), accessed on December 5, 2014 (Portuguese).

[APA-1] TORRÃO DAM. APA Barragens de Portugal, accessed December 18, 2014 .

[str-2] Torrão dam. Structurae International Database for Structures and Civil Engineers, accessed December 18, 2014 .

[EDP-3] ↑ ^a ^b ^c ^d ^e ^f ^g Torrão Informação Técnica. EDP , accessed December 18, 2014 (Portuguese).

[mde-4] Central do Torrão. (No longer available online.) Museu da Electricidade, archived from the original on October 6, 2014 ; Retrieved December 18, 2014 .

[geo-5] Torrao Hydroelectric Power Plant Portugal. Global Energy Observatory, accessed December 18, 2014 .

[da-6] DECLARAÇÃO AMBIENTAL 2012. (PDF 16.1 MB pp. 33–34 (35–36)) EDP , accessed on December 18, 2014 (Portuguese).

[ren-7] Hidroelectricidade em Portugal memória e desafio. (PDF 226 KB p. 29 (27)) Rede Eléctrica Nacional, SA (REN), accessed on December 5, 2014 (Portuguese).