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Sign upJanuary 1, 2008
Kraftwerk Linth-Limmern (KLL) AG
Linthal
Kraftwerke Linth-Limmern AG (KLL), a power plant in Linthal, Switzerland, enhanced its operational efficiency and sustainability by adopting Pumped Hydro Storage (PHS). Located in the Glarus hinterland, KLL integrated a large pumped storage plant in the 2010s to address the need for reliable energy storage, balancing supply and demand, especially amid the volatility of renewable energy sources.
By using excess energy to pump water to an elevated reservoir and releasing it during peak demand, KLL mitigated energy fluctuations. This initiative not only reduces carbon emissions but also promotes sustainable energy practices in Switzerland. KLL’s adoption of advanced storage technology sets a global benchmark for enhancing grid stability and sustainability.
Pumped hydro storage plants store energy using a system of two interconnected reservoirs with one at a higher elevation than the other. Water is pumped to the upper reservoir in times of surplus energy and, in times of excess demand, water from the upper reservoir is released, generating electricity as the water passes through reversible turbines on its way to the lower reservoir. Hydropower can play a defining role in the energy transition thanks to the balancing and system services to the grid that facilitate the integration of variable renewables. With higher needs for storage and grid support services, Pumped Hydro Storage is the natural large-scale energy storage solution. It provides all services from reactive power support to frequency control, synchronous or virtual inertia and black-start capabilities. It brings support that was previously managed by fossil-fueled power plants but with even more reactivity and in a sustainable manner without CO2 emissions.
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