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TenneT TSO B.V. has started the process for contracting Reactive Power for 2024

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As TSO, it is TenneT's statutory duty to monitor the stability of the electricity system in the Netherlands. To this end, TenneT purchases so-called ancillary services, which are offered by market parties. One service related to maintaining the reactive power balance is stationary reactive power. This stationary reactive power is mainly used to keep the voltage on EHS (380 kV and 220 kV) and HS (150 kV and 110 kV) within the required bandwidth, as well as the reactive power exchange with neighbouring TSOs.

While reactive power runs through the high-voltage link, it does not contribute to active power. The reactive power is not seen, so to speak, but plays an important role in the voltage of the AC grid. The grid operator must continuously ensure the right level of reactive power in the grid and does so by commissioning or decommissioning sources of reactive power. As a result of energy transition, the need for reactive power compensation is increasing. The cause is a different utilisation of the high-voltage grid with large variations in transmitted energy over the seasons, but even within the day.

TenneT hereby invites potential suppliers to express their interest by sending an e-mail to the following e-mail For more information about these products please contact Martijn Ophuis (T)+31 026 3731088 or Maarten van Swam (T) +31 026 373 2084.

Suppliers which have been invited for previous tenders for the above products do not have to respond to this notice, as they will automatically receive an invitation for the submission of their offers.

Companies interested in supplying Reactive Power are invited to express their interest by sending an e-mail to the following e-mail address 

Tender guaranteed availability Blind power

In early 2024, TenneT will launch an additional tender for Reactive Power. In the tender, TenneT is looking for (additional) reactive power with a guaranteed minimum availability. The details of the procurement process will be shared with the market in early 2024. 

Parties that can supply reactive power according to the specifications but also think they qualify for the tender for reactive power with guaranteed availability can participate in both tenders.