Since its commissioning on July 1, 2022, the Nant de Drance pumped storage power plant has operated reliably, exceeding expectations. The successful performance can be attributed to careful attention during the commissioning process of the complex and high-performance machines.
The plant's reliability enables it to respond quickly to changes in the electricity market. During periods of excess electricity, water is pumped from the lower reservoir, Emosson, to the upper reservoir, Vieux Emosson. Conversely, when electricity demand exceeds production, the stored water in the upper reservoir is released through the turbines. These adjustments in electricity requirements impact market prices.
Amédée Murisier, Chairman of the Nant de Drance Board of Directors, confirms that the plant is fulfilling its role in stabilizing the electricity grid and contributing to the security of electricity supply.
Since its commissioning, the Nant de Drance plant has generated approximately 950 GWh of electricity and pumped 1,170 GWh of water. These figures align with the projected 80% yield of the pumped storage cycles. Alain Sauthier, Director of Nant de Drance SA, said: “I'm delighted to see that the machines at Nant de Drance are being put to good use every day. Partners can take full advantage of the flexibility offered by the plant and optimise the power of the machines to suit their need.”
The plant has been operating at full power since the activation of the Chamoson-Chippis extra-high voltage line on September 30, 2022.
