Marimbondo power plant
| Marimbondo power plant | ||
|---|---|---|
 |
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| location | ||
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| Coordinates | 20 ° 18 ′ 11 ″ S , 49 ° 11 ′ 53 ″ W | |
| country |
 Brazil
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| place | Fronteira municipality , Minas Gerais state | |
| Waters | Rio Grande | |
| Height upstream | 447 m | |
| power plant | ||
| owner | Furnas Centrais Elétricas | |
| operator | Furnas Centrais Elétricas | |
| construction time | 1971-1975 | |
| Start of operation | 1975 | |
| technology | ||
| Bottleneck performance | 1,440 megawatts | |
| Standard work capacity | approx. 7,000 million kWh / year | |
| Turbines | Francis turbines : 8 × 180 MW | |
| Others | ||
The Marimbondo power plant ( Usina Hidrelétrica de Marimbondo in Portuguese ) is a hydropower plant in Brazil that dams the Rio Grande into a reservoir. At this point, the Rio Grande forms the border between the states of Minas Gerais and São Paulo . The municipality of Fronteira is located one kilometer from the power plant .
The project to build the power plant began in 1971. The first machine went online in October 1975.
Barrier structure
The barrier structure consists largely of a dam . On the right-hand side there is a concrete gravity dam , in which the flood relief is integrated. The machine house is located below the dam and next to the flood relief. The maximum height of the barrier structure is 94 m, the length of the dam crown 3,100 m and the width of the crown 10 m. The top of the dam is at a height of 450 m above sea level . The volume of the structure is 14,400,000 m³. With a maximum storage target of 447 m, the reservoir extends over an area of around 438 km² and holds 6.15 billion m³ of water - of which 5.26 billion m³ can be used to generate electricity.
power plant
With an installed capacity of 1,440 MW, the Marimbondo power plant is the second largest power plant of the electricity producer Furnas Centrais Elétricas after the Itumbiara power plant . The average annual production fluctuates: in 2008 it was 6.785 billion kWh / a and in 2009 it was 8.288 billion kWh / a.
The 8 Francis turbines , each with a maximum output of 180 MW, are located in a machine house at the foot of the dam. They went online from October 1975 to January 1977. The turbines were supplied by Voith , Neyrpic , Creusoti-Loire and MEP . The generators come from ASEA . The nominal speed of the turbines is 100 min −1 . The associated generators have a nominal voltage of 13.8 kV and a nominal frequency of 60 Hz. The diameter of a rotor is 6.5 m.
In the switchgear , the generator voltage is increased from 13.8 kV to 525 kV using single-phase power transformers. The switchgear is on the right side of the river.
The power plant is owned by Furnas Centrais Elétricas and is also operated by Furnas.
Others
In February 2014, due to the drought, the reservoir fell to only 20% of its volume at the maximum storage target. However, the water level is still approx. 7 m above the minimum storage target of 426 m, which is necessary for the operation of the machines.
Web links
- Usina Hidrelétrica de Marimbondo. Youtube, accessed on September 22, 2014 (Portuguese).
Individual evidence
- ↑ a b c d e Marimbondo Hydroelectric Plant. Furnas Centrais Elétricas, accessed September 22, 2014 .
- ↑ a b c d Marimbondo Hydroelectric Power Plant Brazil. Global Energy Observatory, accessed September 22, 2014 .
- ↑ Parque Gerador. (No longer available online.) Furnas Centrais Elétricas, archived from the original on February 13, 2019 ; Retrieved September 22, 2014 (Portuguese). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Reservatório da usina de Marimbondo é o mais seco. Diarioweb, February 7, 2014, accessed September 22, 2014 (Portuguese).
