Flintshire Bridge converter station

A converter station is needed in Deeside to convert the direct current (DC) electricity to alternating current (AC) so that it can be used within the existing National Grid transmission system.

Converter station

In addition to installing a new high voltage direct current connection, we needed to convert the direct current (DC) electricity to alternating current (AC) at each end so that it can be used within the existing national grid transmission system. To do this, we needed to build a converter station at each end of the link.

In February 2013 we received planning permission from Flintshire County Council to build the Flintshire Bridge converter station on Deeside Industrial Park, on land that was formerly part of Shotton Steelworks.

Work planned for 2018

We will complete landscaping of the site.

Work completed in 2017

We completed the majority of work to allow us to commission the converter station and operate the link at up to 900 MW. We also started landscaping the site, where we will be planting more than 15,000 trees and shrubs.

Work to the end of 2016

We completed the installation of all the electrical equipment and started the commissioning process.

Work to the end of 2015

We have made great progress on constructing the converter station. We’ve installed the transformers and other items of large equipment, which were delivered by a specialist haulage company. We then went on to install most of the remaining electrical equipment, both inside and out.

We also installed alternating current cables from the converter station underground towards the River Dee, and then through the pipes that we installed under the river in autumn 2014. Cables were then laid underground along the river bank to connect the converter station to National Grid’s substation in Connah’s Quay.

Work to the end of 2014

Construction of the converter station is being carried out by Siemens, who started work on site at the beginning of June 2013.

Initial work included the removal of extensive foundations and remediation of significant slag deposits. During the year we completed the majority of work to construct the superstructures of the main converter buildings and laid foundations for the other large specialist electrical equipment.

During the year we achieved a significant milestone for the project when we completed the drilling of nine pipes under the River Dee, through which we’ll pull the cables that will link our Flintshire Bridge converter station to National Grid’s substation in Connah’s Quay.

The community

We held two public events in April 2013, a further two events in April 2014, and three events in April 2015. The information displayed at the events and all the newsletters we’ve issued can be found on our Documents page.