| Turbines
will encompass a comprehensive upgrade of the plant’s key components, including Pelton turbines, generators, protection valves, and overhead cranes. Andritz will also supply state of-the-art electrical systems, automation solutions, protection systems, and instrumentation auxiliaries to enhance the plant’s efficiency and reliability. Andritz is also working in Malaysia, where it has been
selected by TNB Power Generation to carry out an extensive rehabilitation project at its country’s oldest hydropower plant. The aim is to extend the Chenderoh hydropower plant’s operational lifespan, increasing capacity of three units by 5%. Competed in 1930, the Chenderoh scheme has been in continuous operation since its last major rehabilitation in the 1990s. Under the current project, Andritz will carry out major uprating works on the turbines, supply new generators as well as rehabilitating the hydromechanical equipment related to the generating units. The safety and reliability of auxiliary systems, the cooling system for unit 4 and various other support systems will also be improved. Electrical systems will be modernised and new equipment, including a generator transformer and a powerhouse crane, will be installed. This rehabilitation at Chenderoh is part of TNB’s
broader Life Extension Programme. An ambitious initiative, it underscores the Malaysian energy provider’s commitment to maintaining and improving its hydropower assets to ensure they continue to operate safely and efficiently, contributing to the overall reliability and sustainability of the country’s power supply.
Norway Norway’s largest run-of-river hydropower plant,
Vamma, is to undergo major modernisation soon, and Norwegian utility Hafslund has selected Andritz to upgrade and improve the performance and efficiency of Vamma’s unit 11. The work will increase unit capacity by 22% to 122MW, and includes dismantling, reassembly, testing and commissioning, as well as model testing and new components. The scope of supply includes a new oil-free Kaplan runner with a water-filled hub, which will not only improve efficiency but contribute to the environmental sustainability of the plant. With a diameter of 7300mm, it will be one of the largest runners installed in Norway.
Commissioning of the fully upgraded Vamma 11
unit is expected in early 2028. Owned by Hafslund, one of Norway’s leading power producers, Vamma is
equipped with 12 turbine generator units, including ten Francis and two large Kaplan turbines. It has a total installed capacity of 343MW and supplies an average of 1580GWh of electricity per year.
Still in Norway, Andritz has signed another major contract to supply advanced electromechanical equipment for the new Øksenelvane hydropower plant in Bremanger municipality. The new plant will be constructed next to the existing Øksenelvane power plant, which will be decommissioned after more than 70 years of operation. With an expected annual production of 171GWh, the new Øksenelvane will generate 21GWh more clean energy than the existing facility. The scope of Andritz’s work here includes the engineering, manufacturing, and supply of high- efficiency equipment, as well as its installation, testing, and commissioning at the project site. The company will supply two state-of-the art Pelton turbines, each with an installed capacity of 55MW, including turbine governors, main inlet valves, penstocks and cooling systems. Two generators, auxiliary equipment, excitation systems with transformers, and complete automation and monitoring systems are also part of the scope of supply.
Scheduled for completion in 2028, the project will
play an important role in renewable energy supplier, Sogn og Fjordane Energi (SFE)’s, mission to expand renewable energy in Norway. Currently, SFE produces 2.4 TWh of renewable electricity annually, meeting the needs of approximately 130,000 Norwegian households.
Below left: Chenderoh hydropower station in Malaysia. Photo by ANDRITZ
Below: Side view of Chenderoh power house. Photo by ANDRITZ
Above: Unit hall of Governador Parigot de Souza hydropower plant in Brazil. Photo by COPEL
www.waterpowermagazine.com | April 2025 | 23
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