Voith to supply new pump turbines to Spanish hydropower plants

8 September 2020

The Valdecañas plant will be equipped with three Deriaz pump turbines, each with a capacity of 83MW.

Technology Group Voith is to supply five pump turbines and associated components to modernise two hydropower plants owned by Spanish electricity generation company Iberdrola. 

The contracts, for which negotiations were conducted entirely online due to the Covid-19 pandemic, covers turbines for the Torrejón and Valdecañas power plants, which are located on the River Tajo. 

For Torrejón, Voith will supply two semi-axial pump turbines, each with an output of 43MW. The scope of supply includes the runners, guide vanes, turbine covers, shafts and bearings, as well as hydraulic and digital governors. As part of the modernization, the plant will be converted to variable-speed operation and in addition, the head will be increased.

For Valdecañas, Voith will supply three Deriaz pump turbines with an output of 83MW each. The scope of supply for this project includes the runners, parts of the control systems and the hydraulic governors. In addition, both projects contain model acceptance tests, installation supervision and full commissioning of the turbines. 

“By modernizing both hydropower plants, Voith is making an important contribution to a more flexible use of hydropower plants in the European power grid,” explains Quentin Seringe, Sales and Marketing Manager at Voith Hydro. “For the Valdecañas project, we are developing a Deriaz pump turbine that can be optimally used especially for small to medium heads. The Torrejón project also represents a special modernization project for Voith due to the speed variability and the increase in head while maintaining the same construction conditions.”

The acceptance of the model tests in mid-2021 will mark the next important milestone for both projects. The first runners for the plants are to be delivered in the second half of 2022 and the last runners in mid-2024. The project will end with the commissioning of the plants scheduled for early 2025.

Torrejón hydropower plant will be equipped with two semi-axial pump turbines, each generating 43MW.

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