EoW March 2010

technology news

EHV cables for hydropower plant Nexans has been awarded the €13 million turnkey contract to supply extra high voltage (EHV) power cables for the new Kraftwerke Linth-Limmern pumped storage hydropower plant currently under construction in the Linthal Valley, eastern Switzerland. This contract covers the design, manufacture and supply, installation, connection and commissioning of about 30km of EHV cables.

Nexans

will

supply

six

380

kV

XLPE-insulated cables, each approximately 5km long, which corresponds to the length of the underground access tunnel in which they will be installed. Laid in parallel to connect the new plant to the EHV power transmission grid, these cables will comprise copper core conductors with a cross-section of 1,600mm 2 . The Limmern pumped-storage project will utilise the proximity of two existing water-holding reservoirs – the Muttsee and the Limmernsee Lakes – by building an underground pumped-storage plant between the two lakes. underground

The Limmern pumped-storage project in the Linthal Valley ▲ ▲

MW power through an underground access tunnel of about 5km long. Nexans – France Fax : +33 15669 8484 Email : nexans.web@nexans.com Website : www.nexans.com

During the day, when power demand is at its peak, water will be released through the turbines to generate electric power. At night, the Limmern plant will pump back water “upstream”, from Limmernsee into Muttsee. For these operations, the Limmern plant will be supplied with1,000

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EuroWire – March 2010