Mascarenhas de Moraes power station
| Mascarenhas de Moraes power station | ||
|---|---|---|
 |
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| location | ||
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| Coordinates | 20 ° 17 ′ 6 ″ S , 47 ° 3 ′ 49 ″ W | |
| country |
 Brazil
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| place | Ibiraci municipality , Minas Gerais state | |
| Waters | Rio Grande | |
| Height upstream | 666 m | |
| power plant | ||
| owner | Furnas Centrais Elétricas | |
| operator | Furnas Centrais Elétricas | |
| Start of planning | 1947 | |
| construction time | 1950-1957 | |
| Start of operation | 1957 | |
| technology | ||
| Bottleneck performance | 476 megawatts | |
| Standard work capacity | approx. 3,000 million kWh / year | |
| Turbines | Francis turbines : 10 | |
| Others | ||
The power plant (Marechal) Mascarenhas de Moraes ( Portuguese Usina (hidrelétrica) (Marechal) Mascarenhas de Moraes ), also called power plant Peixoto ( Portuguese Usina hidrelétrica Peixoto ), is a hydropower plant in the Brazilian state of Minas Gerais , which turns the Rio Grande into a reservoir (Port. Represa Mascarenhas de Moraes or Represa (de) Peixoto ). A few kilometers from the power plant is the Ibiraci municipality .
The project to build the power station goes back to 1947, when the electricity supplier CPFL saw its generation capacity increasingly exhausted. In 1950, CPFL was granted the concession to build, and construction of Peixoto began that same year. The first two machines went online in 1957, the last two in 1968.
The power station was renamed (Marechal) Mascarenhas de Moraes by Peixoto in December 1968 , in honor of Marshal João Baptista Mascarenhas de Morais , who died on September 17, 1968. On August 1, 1973, the operation of the power plant was transferred from CPFL to Furnas Centrais Elétricas .
Barrier structure
The barrier structure consists of an arch dam in the middle, flanked by gravity dams on both sides. On the right side is the main flood relief , consisting of 11 gates with a width of 10.67 m and a height of 12.98 m. A maximum of 9,350 m³ / s can be discharged. In addition, a further flood relief with two gates was built on the far left side, the max. 3,100 m³ / s. Next to and below the left dam is the machine house. The length of the dam crown is 600 m, it is located at an altitude of 669 m above sea level . The volume of the structure is 800,000 m³. With the maximum storage target of 666 m, the reservoir extends over an area of around 250 km² and holds 4.04 billion m³ of water - of which 2.5 billion m³ can be used to generate electricity.
power plant
The Mascarenhas de Moraes power plant is one of Furnas' medium-sized power plants with an installed capacity of 476 MW . The average annual production fluctuates: in 2006 it was 2.849 billion kWh and in 2009 it was 3.097 billion kWh.
machinery
A total of ten machines with different capacities are installed, which went into operation from 1957 to 1968. The following table gives an overview:
| machine | Max. Power (MW) | Start of operation | turbine | generator | Nominal speed (1 / min) | Rotor diameter (m) |
|---|---|---|---|---|---|---|
| 1 | 40 | 1957 | Dominion | Westinghouse | 128.6 | 3,911 |
| 2 | 40 | 1957 | Dominion | Westinghouse | 128.6 | 3,911 |
| 3 | 48 | Morgan Smith | Westinghouse | 138.5 | 3,947 | |
| 4th | 48 | Morgan Smith | Westinghouse | 138.5 | 3,947 | |
| 5 | 49 | W. Stell | General Electric | 128.6 | 4.013 | |
| 6th | 49 | W. Stell | General Electric | 128.6 | 4.013 | |
| 7th | 49 | W. Stell | General Electric | 128.6 | 4.013 | |
| 8th | 49 | W. Stell | General Electric | 128.6 | 4.013 | |
| 9 | 52 | 1968 | MEP | Brown, Boveri & Cie. | 138.5 | 3,950 |
| 10 | 52 | 1968 | MEP | Brown, Boveri | 138.5 | 3,950 |
The ten Francis turbines are located in a machine house at the foot of the left dam. The associated generators have a nominal voltage of 13.8 kV and a nominal frequency of 60 Hz. In the switchgear , the generator voltage of 13.8 kV is increased to 138 and 345 kV by means of single and three-phase power transformers. The switchgear is on the left 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 drought, the reservoir fell to 75% of its volume with the maximum storage target. In August 2014, a judge allowed the operating company Furnas to lower the water level to the minimum storage target of 653 m, at which the machines can still be operated, in order to maintain electricity generation. This affects communities such as B. Delfinópolis sensitive, where large agricultural areas are irrigated.
Web links
- Hydroelectric Plants in Brazil - Minas Gerais. Power Plants Around the World, accessed September 22, 2014 .
- Usina Marechal Mascarenhas de Moraes. Youtube, accessed on September 22, 2014 (Portuguese).
Individual evidence
- ↑ a b c d Mascarenhas de Moraes Hydroelectric Plant. Furnas Centrais Elétricas, accessed September 22, 2014 .
- ↑ a b c d e Mascarenhas de Moraes (Peixoto) 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).
- ↑ Justiça autoriza Furnas a reducedir volume de represa no Sul de Minas. Estado de Minas, August 13, 2014, accessed September 22, 2014 (Portuguese).
