News on HPP Obervermuntwerk II, Austria

Grand opening of Obervermuntwerk II

On June 7, 2019 the hydropower plant Obervermuntwerk II, one of the world's most flexible pumped storage plants, has been officially inaugurated.

From right to left: Dipl.-Ing. Helmut Mennel (Member of the Supervisory Board VIW), Dr Wolfgang Semper (Executive Vice President ANDRITZ AG), Dr.-Ing. Hans-Josef Zimmer (Member of the Board of Management EnBW), Mag. Markus Wallner (State Governor Vorarlberg), Dr. Ludwig Summer (Chairman of the Supervisory Board VIW), Dr. Christof Germann, Member of the Supervisory Board VIW.

The governor of Vorarlberg, Markus Wallner, opened the facility under the presence of high-ranking political representatives and the whole management of Vorarlberger Illwerke. After keynote speeches of Dr. Christof Germann, Managing Director of the Illwerke vkw, and other honorables, Mr. Wolfgang Semper, Executive Vice President of ANDRITZ AG, as the only representative of the equipment suppliers held a speech, expressing his thanks for the excellent cooperation and his appreciation for the opportunity to work on this special project. He emphasized the importance of pumped storage power for today's energy landscape to ensure the energy supply and its role in the transformation of the European energy system.

The opening of the pumped storage plant Obervermunt II is a further milestone in the direction of the energy transition. Pumped storage is the only large-scale opportunity to store energy on a grand scale to meet the country’s ambitious renewable targets.


More peak load energy for Austria

Since September 2018, pumped storage power plant Obervermuntwerk II is producing clean and sustainable energy.

In January 2014, ANDRITZ Hydro received the contract for the supply, installation, and commissioning of two Francis turbine generating units with clutch coupling for the power station Obervermuntwerk II in Vorarlberg, Austria. Feasibility studies, significant design, and construction work have already begun in 2011.

The pumped storage power plant Obervermuntwerk II serves as supplier for peak-load and balancing energy and is the second largest power plant of Vorarlberger Illwerke AG. The Obervermuntwerk II increased the capacity of the Upper Ill-Lünersee power plant group with additional 360 megawatts in turbine as well as pumping operations.

This was realized with the concept of a ternary machine set with a controllable pump and thus enables the fastest possible adjustability of this power plant as well as the pumped storage with best possible efficiencies. The technical specifications to operate the turbines permanently within the entire operating range by zero load without any partial load stabilization measures represented a high technical challenge, which was fully met.


Total output: 2 x 180 MW 
Head: 240 m
Speed: 428.6 rpm
Diameter: 2,320 mm

View some pictures of the project ...

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