Greenlink

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Greenlink Interconnector[1]
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County Wexford, Ireland and Pembrokeshire, Wales
Location
CountryIreland, United Kingdom
General directioneast-west
FromIreland
Passes throughSt George's Channel
ToWales
Construction information
Commissioned29 January 2025
Technical information
TypeSubmarine cable
Type of currentHVDC
Total length190 km (120 mi)
Power rating500 MW
AC voltage400 kV (UK); 220 kV (Ireland)
DC voltage320 kV

Greenlink is a 190 km long 500 MW high-voltage direct current (HVDC) submarine power cable between County Wexford in Ireland and Pembrokeshire in Wales.[2]

Route

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The cable runs between EirGrid's Great Island substation in County Wexford, and National Grid's Pembroke substation in Pembrokeshire, with the cable making landfall at Baginbun Beach near Fethard-on-Sea in Ireland and at Freshwater West beach near Castlemartin in Wales. The total length is 200 km (120 miles), of which 160 km (100 miles) is under the sea.[3][1][4]

Specification

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The HVDC link is configured as a symmetrical monopole, with DC voltages of ±320 kV, and nominal power rating of 500 MW. The project is expected to cost €400 million.[1]

Project history

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Subsea surveys were undertaken in 2018, and public consultations in 2019.[3]

In April 2020, the company submitted three planning applications for onshore construction in Wales.[5] The project still required planning permission and marine licences in both the United Kingdom and in Ireland, but the process of procuring construction contracts had started.[6][3]

In March 2021, the project was granted a licence to install the sea cable in UK waters, with a similar licence for Irish waters still pending. As of March 2021, commissioning of the interconnector was planned for the end of 2023.[7]

In January 2022, construction work on converter stations started.[8] In March 2022, the company announced that it had reached financial close,[9] and offshore construction commenced in May 2022.[8] Construction and trial operation was completed in August 2024,[10] with testing of the link commencing in December 2024 and operationalizing on 29 January 2025.[11] The link was officially launched in April 2025.[12]

See also

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References

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