Alstom to supply generators for Austrian pumped-storage power station

Alstom was awarded a contract by Vorarlberger Illwerke AG for the supply of two generators and exciters for the Obervermuntwerk II pumped-storage power station in Austria. The generators have an output of 180 MW each and are specially designed for flexible use. Alstom is also responsible for the assembling and commissioning the machines.

Once in operation in 2018, the Obervermuntwerk II pumped-storage power station will have an output of 360 MW and will be Illwerke’s second-largest power station. The power plant is designed as a parallel to the existing Obervermuntwerk. It will be constructed at an altitude of 1,700 metres above sea level, as an underground station between the two reservoirs Silvretta and Vermunt in Montafon.

The design specifications of both Obervermunt’s generators are specifically tailored to the power station and have excellent part-load capability. As a result, they operate efficiently in lower and medium load ranges as well. In terms of flexibility, pumped-storage power plants increase up to 33 percent of rated power for partial load operation range. This means that power generation can be ideally adjusted to the capacity required in the grid. This flexibility is beneficial in terms of both costs and environmental friendliness.

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