Voith Hydro has been contracted by Norwegian energy supplier Sira-Kvina kraftselskap to upgrade Tonstad and Solhom hydroelectric power stations.

As per the terms of the NOK320m ($38.8m) contract, Voith will be responsible for the upgrade of the control systems and the provision of protection for complex medium and extra high-voltage systems. 

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These upgrades will improve both personnel safety and operational reliability, as well as securing the production of clean, renewable energy for another 40 years.

In addition, the old relay control systems of the two power stations will also be replaced with a programmable logic controller (PLC). 

"It is among the largest stand-alone automation contracts awarded within the Norwegian hydropower market."

Voith Hydro's CEO Frode Moen said: “We are very satisfied being awarded this prestigious project by Sira-Kvina. It is among the largest stand-alone automation contracts awarded within the Norwegian hydropower market.”

The Tonstad power plant is Norway’s largest when it comes to average annual production of 3,800GWh, while Solhom power plant has an average annual production of 695GWh generated by two Francis turbines. In total, both plants meet the energy demand of roughly 230,000 households.

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Beginning in 2017, auxiliary systems will be commissioned at Tonstad and new control systems for all five units at the plant will be commissioned from 2018 to 2022.

At the Solhom hydropower plant, the auxiliary systems will be commissioned in 2019 and new control systems for the units will follow in 2020 and 2021.

Work under the contract is expected to be completed in 2022.

Image: Voith secures contract from Sira-Kvina kraftselskap. Photo: courtesy of Voith.