Non availability

The Dutch high‑voltage grid is often not fully operational. This is not necessary, however, because our transmission grid has been designed in such a way that we can switch off parts of it without the energy supply being affected. Almost every week, certain grid components are taken out of operation for planned service. 

Dual lines and ring-shaped structure

The Dutch high‑voltage grid has a redundant design. This means that the transmission grid has a 'dual' structure almost everywhere. For instance, there are two circuits for each high‑voltage connection and the high‑voltage substations have extra transformers. Thanks to this redundant high‑voltage grid, TenneT has various options for performing the desired transmissions

The transmission grid also has a ring‑shaped structure. If there is a problem somewhere, TenneT will be able to transmit the electricity via a different route. During planned servicing or during disruptions, we will have alternative routes available in order to guarantee the security of supply. As a result, both preventive maintenance and sudden faults usually do not have any consequences for users of the grid. 

Planned maintenance

TenneT only carries out servicing work if the availability of the transmission grid allows it. This is why we compile an integrated plan of all our preventive maintenance activities. During the performance of preventive maintenance, it should always be possible to deal with disruptions without the grid being affected. We determine in advance whether maintenance can take place safely, in accordance with this condition.

Working safely

Our maintenance activities are organised in such a way that our staff can do their work safely. When part of the high‑voltage grid is taken out of operation, this process always involves several employees. During maintenance work, our employees adhere to strict procedures and always wear safety gear.