All articles

Strukton to renovate TenneT high voltage substations

Strukton has won a TenneT tender for renovating the 110/150 kV high voltage substations for Lot B (Rijssen, Terwinselen and Raalte).

Strukton will apply a new concept for this purpose. The work will start in September and must be completed by the end of 2021. 

Over the coming ten years more than 100 high voltage substations in the Netherlands must be replaced because they have reached the end of their service life. Constructing these substations requires an entirely new standard, consistent with today’s digitalisation requirements and the energy transition. Grid operator TenneT has decided to implement this renovation in steps and will start with two plots consisting of 2 and 3 high voltage substations, respectively. Strukton and Croonwolter&dros have won the respective tenders for these plots and will each renovate a plot in accordance with their own concept. After a year, TenneT will inspect the two concepts to determine which concept is best suited. The other 110/150 kV high voltage substations will subsequently be renovated in accordance with the selected concept (or a mix of the two). 

Skids: fast and safe

Strukton’s design meets the three requirements specified by TenneT: the design must be modular, it must become the new standard for the remaining high voltage substations and it must be safe for the technicians working there. Strukton has decided to work with skids: frames with the high voltage components mounted on them. The skids will be built in advance, after which a special carrier will move them into the installation. The only thing that is required then is to connect the skids. This approach is fast and safe. In the event of a malfunction, the skid can easily be removed from the installation and the technicians can then do their work in a safe zone.


"Over the coming ten years more than 100 high voltage substations in the Netherlands must be replaced"


Strukton’s winning design was developed through a multidisciplinary cooperative effort of the Oranjewoud NV companies. Strukton Systems will be responsible for all high voltage and control engineering work and for the development and implementation of the software. Antea Group has signed on for the environmental and permit management work. Strukton Rolling Stock will build the control boxes, and Strukton Civiel will be responsible for all civil engineering works, including excavation, the foundation, and site preparation.

Ready for the end of 2021

Strukton will start working on the detailed design in September. All of the preparatory work must be completed within nine months, including the fit-up of a hall for the production of the skids and the control boxes, and the high voltage components: integration, software development, permit applications, and the construction of a test model. The first substation must be ready for implementation in the first quarter of 2020. This is expected to take five to six months. All three high voltage substations must be ready by the end of 2021. 

TenneT innovates

Due to future and new developments, such as smart grids, decentralised power generation, microgrids and data centres, the function of the 110/150 kV grid, the transport grid, is becoming increasingly more important. These new developments require innovative substations and acceleration. In addition, the substations are becoming more obsolete each year. The current replacement strategy is not keeping up with the new challenges and developments. To prepare the substations for the future, more than 1,000 fields must be replaced over the next 10 years. This is really only possible if we standardise our 110/150 kV substations.


More about TenneT

Strive to ensure a reliable and uninterrupted supply of electricity in the high-voltage grid for 41 million people

Read more