8.2 Consulting carries out manufacturing surveillance of Hollandse Kust Zuid turbines

8.2 Consulting AG (8.2) is supporting Vattenfall with production supervision and surveillance services for the manufacturing of turbines by Siemens Gamesa for Vattenfall's Hollandse Kust Zuid wind farm project.

The pre-series production of the first five Siemens Gamesa SG 11.0-200 DD turbines was largely completed at the end of July 2021 and had been going on for almost a year at the production site in Brande, Denmark. This process aims to optimise production processes and prepare the serial production of the remaking 135 turbines which started a few days ago at the new location in Cuxhaven.

Due to the complexity and the new turbine technology, future operator Vattenfall decided for extensive production supervision. 8.2 had previously supported Vattenfall at the Kriegers Flak project. Its scope Hollandse Kust Zuid includes the monitoring continuously of the serial production of hubs, generators and the entire back-ends with a team of inspectors on site.

The complete production chain is examined – from the delivery of the single components through the mechanical inspection after final assembly to the visual final inspection of each wind turbine.

Due to the pre-series status, no defined processes and proper documentation for the inspection. According to 8.2, several changes and improvements could be integrated directly into the production processes and weak points that later became apparent as potential failures were discovered early on.

“8.2 Consulting AG has provided Quality and Surveillance services to Vattenfall for the Hollandse Kust Zuid 1-4 Project with respect to Nacelle production. During times when travel has been difficult and onsite presence has been challenging due to the ever evolving COVID-19 situation, 8.2 have provided eyes and ears for Vattenfall and helped ensure critical milestones are delivered and an extremely high level of quality is met. 8.2 have been a brilliant partner to work with on the HKZ project thus far, and I look forward to the continued collaboration for the rest of the project.” states Ben Flett, BU Offshore at Vattenfall.

The Hollandse Kust Zuid project consists of two sites,
Hollandse Kust Zuid 1&2 and Hollandse Kust Zuid 3&4, and is being developed by Vattenfall, which secured the rights to the projects with subsidy free bids in March 2018 and July 2019. They are located between 18 and 36 kilometers off the Dutch coast, between The Hague and Zandvoort. They will be fitted with 140 units of Siemens Gamesa 11 MW, SG 11.0-200 DD offshore turbines. Once the wind farm is operational, the 140 wind turbines will produce more than 6 TWh of green electricity annually. The project is expected to be fully operational in 2023.

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