Dear friend of Technical English!
This once we will discuss hydropower. Hydro accounted for 16% of global electricity consumption. In 2009/2010 11 000 hydro power plants (HPPs) in 150 countries were generating electricity. The total electricity generated by HPPs in 2009 reached 3 329 TWh, 16.5% of global electricity production.
So, pay attention and make comments to the technical text below. Enjoy!
Sayano-Shushenskaya Hydro Power Plant
The Sayano–Shushenskaya hydro power plant is the largest power plant in Russia by the installed capacity and the sixth-largest operating hydro power plant in the world at present. The HPP is part of the Yenisei Cascade that is located in the territory of the Krasnoyarsk district and the Republic of Khakassia. It comprises three stages:
All hydro power plants were designed by the institute „Lengidroproject“. The main consumers of electricity produced by the HPPs are undertakings of the aluminium smelter company „Rusal“. The considerable part of produced electricity is delivered to the energy system of Siberia.
At the Sayano–Shushenskaya HPP 10 hydropower turbine and generator units are installed each of capacity 640 MW at 194-metre (636 Ft) head. The efficiency coefficient of a turbine in an optimal zone makes about 96%, the total weight of a turbine is 1440 t..
The turbines power up 10 hydrogenerators, equipped with a rotor of 10.3 m diameter, generating electricity at 15.75 kV. The turbines were manufactured at the “Leningradsky Metallichesky Zavod”, whereas the works “Electrosila” manufactured and supplied generators.
One generating power unit consists of two
neighbour hydropower turbine and generator units and runs for one group of three one-phase transformers each of capacity 5333 MWA at voltage 15.75/500 kV (in total 15 main transformers are installed at the HPP).
The open switchyard at 500 kV is located in the distance of 1.2 km lower along the current of the Yenisei river. The electricity is delivered from the HPP to the switchyard through three electricity transmission lines along the left bank of the river and two transmission lines using the long-span support placed on the rock excavation on the right bank. The electric power from the switchyard to the energy system is provided through four transmission lines at 500 kV.
The station constructions include the concrete arch-gravity dam, an administrative power plant building located near the dam, and an additional spillway. The dam of 245.5 metres (805 ft) high raises up the maximum head of 220 metres (720 ft). Water pressure for the dam is approximately 30 million tons, 60% of which is neutralized by the dam own weight and 40% is carried to rock on the bank.
The dam is constructed to “safely” withstand earthquakes up to 8 on the Richter scale. It was recorded by the Guinness Book of World Records for the strongest construction of its type.
The dam supports the Sayano-Shushenskoye reservoir, with a total capacity of 31.34 km3, useful capacity of 15.34 km3 and surface area of 621 km2 (240 sq mi).
PS: You can find unknown words and expressions from the area of power engineering (including hydro power) in TrainTE Vocabulary (Power engineering: English–Russian-Czech vocabulary and in Technical English Vocabulary – power engineering (Russian–English–Czech vocabulary).
enwikipedia.org – http://en.wikipedia.org/wiki/%D0%A1%D0%B0%D1%8F%CC%81%D0%BD%D0%BE-%D0%A8%D1%83%CC%81%D1%88%D0%B5%D0%BD%D1%81%D0%BA%D0%B0%D1%8F_%D0%B3%D0%B8%D0%B4%D1%80%D0%BE%D1%8D%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D1%81%D1%82%D0%B0%CC%81%D0%BD%D1%86%D0%B8%D1%8F