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Congestion study Friesland

In the south and west of Friesland, the limit for feeding electricity back into the national high-voltage grid will be reached in 2021.

The high-voltage stations and connections in this area are at their maximum limit of what can be transported. TenneT will invest a quarter of a billion euros in the coming years to increase the capacity of the grid. At the same time, the national grid manager is investigating the possibilities of creating more connection space with other solutions. 

National grid operator TenneT is looking for parties in Friesland, Flevopolder, Gelderland, Utrecht, Limburg and Brabant that can handle their electricity supply and demand flexibly. This exploration is part of the congestion study that the grid manager is currently conducting in order to use the busy electricity grid even more intensively.

Uitbreidingsplannen in Friesland



Update incident transformator TenneT Friesland

The salvage of TenneT's lead-heavy transformer that tipped over during a transport on 7 September is expected to take several more weeks. A number of experts visited the site last week for further investigation. A recovery plan is currently being worked on to remove the transformer from the field. After the salvage, it should become clear whether the transformer can be repaired on site or at the factory. TenneT is currently investigating whether a temporary replacement of the transformer is possible and necessary.

On 7 September 2022, a transformer with flatbed trailer sank through a temporary road and overturned. This happened during the last part of the transport, from the temporary unloading quay in Tytsjerk to the high-voltage substation Louwsmeer. Fortunately, no personal accidents occurred in the incident. The exact cause of the incident is still under investigation.

Last week, experts visited the site for an inspection. Expert inspection after salvage should reveal the extent of the damage and whether the transformer can be repaired on site or needs to be returned to the factory. A plan has been drawn up to salvage the current transformer and remove it with heavy equipment. Salvage is expected to take several weeks.

Entrance and exit to the high-voltage highway

The transformer was part of the grid reinforcements TenneT is currently doing in Friesland. In Louwsmeer, the installation was to serve as a connection point between the national and regional high-voltage grid. Currently, the Frisian grid is connected to the national high-voltage grid at three locations via transformers in Burgum, Louwsmeer and Oudehaske. Such transformers allow electricity to be transmitted from the province to the national grid or vice versa. Due to the growing demand for electricity transmission, reinforcement of these up- and downstream transformers will eventually be needed.

No impact on security of supply

The removal of this transformer has no impact on security of supply. However, future availability of the facility has been taken into account. TenneT is currently investigating whether it is possible and necessary to temporarily obtain another transformer somewhere in the short term. An additional transformer will be installed in 2024. This is on order.

Impact on congestion management research Friesland

The capacity of the transformer is included in the calculations TenneT is currently doing for a study to deploy congestion management (rush-hour avoidance) in Friesland. This study is being conducted because there is strong growth in the coming years, especially in solar parks. With this system, available capacity can be reallocated at busy times. This study will not be completed until there is clarity on the (temporary) solution.

The transformer attracted a lot of attention in recent weeks. In the immediate vicinity in the hamlet of Suwald, TenneT also delivered a letter today for local residents with a detailed explanation of the development. A temporary road has also been created for local residents.