Voith transports 170-metric-ton spherical valve to Europe’s largest variable-speed pumped-storage plant in Portugal
As well as the spherical valve, Voith is also supplying the plant with two variable-speed, reversible 390-MW-pump turbine units, two asynchronous motor generators, each with a rated output of 440 MVA, the frequency converter and control technology as well as hydraulic steel components. The system is set to go on stream this year to become the largest variable-speed pumped-storage power plant on the continent.
Variable speed pump turbines
The variable speed pump turbines are what make Frades II special. Because of the variable speed the pump output can also be adjusted, resulting in additional flexibility in the amount of electricity taken from the grid in the event of excess capacity. And it is precisely this combination of electricity storage and variable pump output that is crucial to the ongoing expansion of wind power. Frades II will be installed in an underground cavern, with a height difference between upper and lower reservoirs of 420 meters.
Portugal is banking on renewable energies
For electricity generation, Portugal is relying primarily on wind, solar and hydropower. Since the turn of the millennium, the country has multiplied ist capacities for electricity generation from wind power. In 1998 Portugal had just 51 MW of installed capacity in wind turbine facilities; just 12 years later this had risen to 3,702 MW, and there are plans to extend capacity to 5,400 MW. High-capacity pumped storage plants form the backbone for the further expansion of power generation from renewable energy sources. Almost 42% of renewable energy in Portugal comes from hydropower.
Voith sets standards in the markets energy, oil and gas, paper, raw materials and transport & automotive. Founded in 1867, Voith employs more than 43,000 people in over 50 countries worldwide, generates €5.7 billion in sales and is today one of the largest family-owned companies in Europe.
Dr. Vesna Stirnadel
Voith Hydro Holding
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