Austria’s 450-MW Kopswerk 2 pumped-storage inaugurated

Austria utility Vorarlberger Illwerke AG inaugurated its 450-MW Kopswerk 2 pumped-storage project May 15, 2009, on the Ill River.

Kopswerk 2 took four years to construct and has supplied power to the grid since the end of 2008. The new project is expected to generate about 614 gigawatt-hours annually.

Illwerke developed the 400 million euro (US$545 million) project jointly with German utility EnBW AG.

Kopswerk 2 is highly flexible. Units can operate in stand-by mode, in which the turbine and pump operate on the network simultaneously. In this mode, operation can be changed to either turbine or pump quickly.

The plant’s three units consist of a Pelton turbine, a motor-generator, a starting converter, and a storage pump. Kopswerk 2 features separate machine sets with separate pumps and turbines rather than reversible pump-turbines.

Project service and product suppliers include: ABB AG, Adams Schweig AG, Andritz Hydro, Arge Drukstollen Kops II (Swietelsky Bau Tunnelbau GesmbH, Torno SA, and Torno S.p.A.), Arge Kavernenkrafthaus Kops II (Jager Bau GmbH, Beton und Monierbau, Zublin, and Alpine Mayreder), COWA Remscheid GmbH, Hans Kunz GmbH, VAM GmbH, VA Tech SAT GmbH & Co., and Voith Hydro.

Voith Hydro supplied major equipment to the project, including pumps, converters, spherical valves, and butterfly valves. The project adjoins the conventional 247-MW Kopswerk 1 hydroelectric project. VA Tech SAT GmbH & Co. supplied static excitation systems.
(HydroWorld 8/4/06)

Kopswerk 2 features a maximum head of 818 meters between Kops Reservoir, the upper reservoir, and balancing reservoir Rifa, the lower reservoir. The powerhouse is in an underground cavern near Rifa Reservoir, in Vorarlberg.

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