Last transformer for HKZ onshore transformer station arrives at Maasvlakte

© TenneT (Twitter)

Today, 21 September 2020, TenneT welcomed a 180-tonne transformer on the Maasvlakte. It is the last of a total of four transformers for a new transformer station that is part of the Net op Zee Hollandse Kust Zuid connection. The transformer will be brought to the station and installed in the coming days.

The transformer weighs 180 tonnes and is 10 meters long and 4.5 meters high. The three other transformers have already been delivered, the first of which in June this year. The transformers were made by Siemens in Austria and transported by ship to the Maasvlakte.

In the new transformer station on the Maasvlakte, the electricity from Vattenfall’s 1,400 MW offshore wind farm Hollandse Kust (zuid) will be converted from 220 kV to 380 kV voltage level so that the electricity can be transported on TenneT’s Randstad 380 kV Zuidring national high-voltage grid.

In September 2019, groundworks started at the station. This summer TenneT started laying the cables for the transformer station. In total, this includes approximately 136 km of high-voltage cables, low-voltage cables and telecom cables, according to the grid operator.

Net op Zee Hollandse Kust Zuid connection
The new transformer station, together with two offshore platforms (Hollandse Kust Zuid Alpha and Hollandse Kust Zuid Beta), each with a capacity of 700 MW, two 220 kV AC cables per platform and an extension of the existing high-voltage substation ‘Maasvlakte’, are part of the Net op Zee Hollandse Kust Zuid project. The Hollandse Kust Zuid Alpha and Hollandse Kust Zuid Beta are to become operational in 2021 and 2022 respectively.

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