Skip to content
Zonnepark Astronergy kolham

Studies on congestion management

The Dutch electricity grid is becoming increasingly busy. In various regions the demand for capacity in TenneT's high-voltage grid is greater than the available supply. TenneT will therefore be expanding its grids considerably over the next few years. At the same time the grid manager is investigating whether there are also solutions for making extra capacity available in the shorter term.

One such possibility is the application of congestion management, a market mechanism whereby scarce capacity is redistributed at peak times. On this page the progress of the various studies can be found. TenneT is conducting various studies to this end. This page contains links to the various studies and their progress.

Studies on congestion

Congestion study Port of Rotterdam and Goeree-Overflakkee

For a large part of the port of Rotterdam (Europoort, Botlek and Pernis) and the regions of Voorne-Putten, Goeree-Overflakkee, Hoek van Holland and Hoogvliet, TenneT and Stedin will investigate whether the electricity grid can be used more efficiently by means of congestion management ear offtake of electricity. The high-voltage grid in these regions is almost at maximum capacity due to a rapidly growing number of (ballast) requests and to connect electrolysers, e-boilers, shore power, e-logistics and electrification of other industrial processes. Together, the applications account for 650 MW and were only foreseen in various scenarios towards 2030. The 650 MW growth is comparable to four times the capacity of the city of Delft.

Congestion study Groningen Drenthe and Overijssel

The provinces of Groningen, Drenthe and Overijssel have seen explosive growth in recent years in the number of parties seeking to produce renewable energy. In particular, the number of solar parks seeking to locate here has grown substantially in recent years. In large parts of these provinces, the electricity grid was also already at the limits of its maximum capacity. With the new rules from the Grid Code, TenneT wants to investigate whether applying the rush-hour avoidance system in these provinces can create capacity leeway.

Congestion study in Drenthe

The province of Drenthe has seen growth in additional demand for off-take capacity in the past period. More companies are joining and companies are taking steps to electrify their energy supply by installing e-boilers. This rapid growth is now leading to a bottleneck in TenneT's Zeijerveen/Assen grid, the connection station between the regional high-voltage grid and the national electricity highway. This has implications for available grid capacity throughout the province and part of Overijssel as the limits of available capacity at a large number of underlying stations in Drenthe are being reached. TenneT and Enexis are currently working hard on the expansion of Zeijerveen high- and medium-voltage substation. This expansion will be completed in 2025/2026.
 

Frequently asked questions

Congestion means that the demand for the transmission of electricity, exceeds the available transmission capacity of the existing grid. Read more here.

The Dutch electricity grid is becoming increasingly busy. In various regions the demand for capacity from TenneT's high-voltage grid is greater than the available supply. TenneT will therefore be expanding the grids considerably over the next few years.

At the same time the grid manager is examining whether there are also solutions for the shorter term to make extra capacity available.

One of these possibilities is congestion management, a market mechanism whereby scarce capacity is redistributed at peak times. The network operator is obliged to carry out this investigation in the event of scarcity on the network.

The investigation will be started if there is no longer sufficient grid capacity. Connecting more customers means that the grid could become overloaded. 

On this page we'll update you on the lead times.