| Refurbishment
the Braunau-Simbach undertaking, the company will undertake the revitalization of four generators, alongside crafting new stators and rotor poles for the Austrian segment in the coming years. The equipment for both projects will be simultaneously manufactured and delivered in the upcoming years. The on-site delivery of the first generator components is planned for Q1 2024, with manufacturing of the remaining generators planned in the period up to 2030, valued over several tens of millions of euro. The Egglfing-Obernberg Hydropower Plant is located on the German side of the Austrian – German border on the River Inn. The remaining scope of work encompasses the manufacturing of six completely new generators, the dismantling of old generators, the installation of new generators at the existing power plant and their commissioning. The project includes upgrading the power output of the 200-tonne generators from 16 MVA to 20 MVA. The Braunau-Simbach Hydropower Plant, also on the River Inn, is located on the Austrian side of the German – Austrian Border. The remining scope of work consists of the revitalization of four generators, including new stators and rotor poles, the dismantling of old generators, with installation and commissioning of new generators. Within the project, the generators weighing more than 300-tonnes, will also undergo upgrade in power output from 32 MVA to 35 MVA. KONČAR has previously secured a tender with the same customer, for the delivery of three new generators for the Ering – Frauenstein Hydropower Plant, which is in the final phase, and on-site operations are due to commence on the last generator.
Control system In October 2022, Rittmeyer was granted the contract to
embark on a comprehensive control system renewal initiative at the Ryburg-Schwörstadt hydropower plant in Switzerland. This extensive undertaking is slated to span a duration of five years, culminating in its completion by 2027.
With a capacity of 120MW (four 30MW Kaplan turbines), the Ryburg-Schwörstadt hydropower plant is the most powerful hydropower plant on the High Rhine and is located about 20km upstream from Basel. The entire control technology is being renewed. Among other systems, it includes a complex automatic water management system with the main task of ensuring a constant water level at all times. It also controls the power redistribution between the two Swiss and two German machine groups. The system includes complex weir controls for the four weir fields as well as an emergency controller. The modernization process and automation of the four machine groups will be executed in a phased approach, intertwined with the ongoing operation of the remaining three machine groups. The inherent challenge in this endeavour lies in deftly managing the substantial water flow of the Rhine River. In the event of a trip of one or more machine groups, the water of the tripped machine groups must be redirected to the weirs in the shortest possible time. This requires highly available and very fast-acting systems to avoid excessive level increases in front of the power plant. Rittmeyer’s expertise, particularly in the renewal of safety-critical processes within expansive river power plants, played an instrumental role in clinching the contract. As part of this initiative, the encompassing control system responsible for redundant
electricity production dedicated to the power plant’s internal use will be revamped. Furthermore, the station control technology governing a total of eight switchgear panels will undergo a comprehensive overhaul, integrating into the new overarching control framework. Employing the advanced RITOP control system equipped with remote alarming, complemented by the RITAS alarm server and the efficient RIFLEX process stations, the Ryburg-Schwörstadt hydropower plant is poised to embrace a state-of-the-art solution from Rittmeyer, meticulously aligned with the most current safety benchmarks. After the renovation, the run-of-river power plant will again be state of the art and can be operated reliably and safely for another 15 to 20 years. In addition to the entire Rittmeyer AG project team,
Beat Karrer, CEO of Kraftwerk Ryburg-Schwörstadt AG, is also looking forward to the extensive project: “We have come to know Rittmeyer as an efficient, solution-oriented, and pleasant partner who brings the necessary expert knowledge and has the right solutions and products for this sophisticated modernization. I look forward to working together on the renewal of our hydropower plant’s control system.”
Turbine modernisation Andritz has secured a contract from Engie Brasil
Energia for the comprehensive modernization of the 424MW Jaguara hydropower plant in Rifaina, State of Sao Paulo. The plant is a pivotal component of Engie’s hydro generation portfolio and has been in uninterrupted operation since its inception in 1971. The project, slated for completion by the close of 2028, is set to encompass an extensive overhaul of the plant’s core components. Andritz’s scope of work entails the modernization of all four 106MW Francis turbine generator units. The renovation will also encompass the refurbishment of governors, the excitation system, the automation system, as well as all associated auxiliary systems. The contract will be executed by Andritz Hydro Brazil. The contract increases the partnership between Engie and Andritz and is the biggest contract Andritz Hydro Brazil has ever signed for a single hydropower plant modernization project.
Rotorpoles GE Vernova’s hydropower business has been chosen
by Hafslund Eco to provide new Rotorpoles for the 3x 280MW / 300 MVA water-cooled generators used by the Aurland 1 hydropower plant in Norway. Scheduled to take place between the summer of 2025 and 2027, the service activities will be carried out in
www.waterpowermagazine.com | September 2023 | 27
Above: Soletanche Bachy is working on a project to waterproof the foundation and implement drainage solutions at the Vioreau dam in France
Below: Rittmeyer was granted the contract to renew the control system at the Ryburg- Schwörstadt hydropower plant in Switzerland © Kraftwerk Ryburg-Schwörstadt AG
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