Innertkirchen 3, Switzerland

More power for Grimselstrom - Small & Mini Hydro

Since the end of 2016 a new hydropower plant has been producing a further 11.5 GWh of electrical energy per year for the Canton of Bern in Switzerland.

Kraftwerke Oberhasli AG (KWO) awarded an order to ANDRITZ HYDRO for the supply of electro-mechanical equipment for the hydropower plant Innertkirchen 3 in September 2014.

KWO was founded in 1925 in order to exploit the hydraulic potential in the Grimsel/Susten area for the production of electrical ­energy. With a total of nine power plants, eight storage lakes, and an installed turbine capacity of 1,368 MW, KWO produces about 2,350 GWh of renewable electrical energy annually.

HPP Innertkirchen 3 is operated as a run-of-river power station, with only a small pondage, but without reservoir management. The scope of supply comprised installation and commissioning of a vertical, six-jet 3.2 MW Pelton turbine, including governor, a 3.5 MVA generator, cooling water system, and main inlet valve (DN 1000, PN 16).


Total output: 3.2 MW 
Scope: 3.2 MW
Voltage: 6.3 kV
Head: 131 m
Speed: 430 rpm
Runner diameter: 1,070 mm

Author: Ralph Zwingli

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