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Voith Hydro Supplies Pumped Storage Technology for Venda Nova III

23.12.2010

Voith Hydro Heidenheim has been awarded a new order from the Portuguese facility EDP (Energias de Portugal): On Friday, December 10, representatives of both companies signed a contract for the equipment of Venda Nova III pumped storage plant.

Order value runs up to 122 million Euros. Voith Hydro as the leader in a consortium with Siemens Portugal is to supply the complete electromechanical equipment for two reversible pumped storage units.

„Venda Nova III is a milestone in hydro power: variable speed technology supports direct grid control. In the era of renewable energies this is the new role pumped storage plants are playing. And Voith is setting the trend, says Dr. Siegbert Etter, Executive Vice President Technology of Voith Hydro Holding.

Thanks to their variable speed, the pumped storage units of Venda Nova III can adapt their number of revolutions continuously and take capacities from the grid in the range between 319 and 380 megawatts. Units with fixed speed do not provide this range – their pumping power is regulated with the aid of further units or plants. For the development of wind power, whose supply capacities are intermittent and not precisely predictable, providing flexible reserve, however, plays a crucial role. In combination with variable speed pumped storage, wind power plants become more reliable and more profitbale.

Voith Hydro will supply two pumped storage units with variable speed, with 380 megawatts (rated power in turbine mode) each, and two asynchronous motor generators, with a rated capacity of 420 megavolt ampere, the frequency converters, the control system and the hydraulic steel structures.

In early 2015, Venda Nova III will be connected to the grid in order to support wind power in Portugal. The country’s government plans to develop further 5.400 megawatts of wind power capacity.

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