Offshore Wind

TenneT BalWin4, LanWin1

Anagha.Puranik@mcdermott.com — Mon, 26 Aug 2024 09:42:23 +0000

TenneT BalWin4, LanWin1

2 2GW

HVDC marine stations

2023

awarded

Highlights

Design, fabricate, install, and commission the offshore converter substation platforms for two 2GW HVDC grid connection systems, BalWin4 and LanWin1.
Convert up to 2GW of offshore wind-generated electricity from 66 kV alternating current (AC) to 525 kV direct current (DC) to facilitate efficient electricity transmission to the onshore station.

The fabrication of BalWin4 will begin in 2025 with a commissioning date of 2029, while the LanWin1 platform’s fabrication, installation and commission follows a year later, reaching completion in 2030. These platforms' main objective is to convert up to 2GW of offshore wind-generated electricity from 66kV alternating current to 525kV direct current. This conversion facilitates efficient transmission of electricity to the onshore station, enabling the integration of renewable energy sources into the power grid at a significant scale.

Offshore Wind

Location

Offshore Germany

Scope

EPFIC

TenneT BorWin 6 Land Station

Anagha.Puranik@mcdermott.com — Mon, 26 Aug 2024 09:39:11 +0000

TenneT BorWin 6 Land Station

380 kV/220 kV

transmission grid

43 million end consumers

will benefit from a stable electricity supply

Highlights

HVDC land station
Engineering, procurement, construction, and commissioning of the onshore land station
Groundbreaking ceremony held in Büttel in August 2024

Electricity generated at sea is directly fed into the onshore converter platform where the conversion of AC into direct current (DC) takes place. The electricity is transported by submarine cable to shore and then by underground cable to the onshore converter station, where it is converted back into three-phase current and fed into the extra-high voltage grid. Economically speaking, this innovative technology leads to enormous cost savings.

Offshore Wind

Location

Germany

Scope

EPFC

TenneT BorWin 6 OSS

Anagha.Puranik@mcdermott.com — Mon, 26 Aug 2024 09:34:00 +0000

TenneT BorWin 6 OSS

900MW HVDC

marine station

4,800 T

reference plant and design

17,600 t

topsides Wt.

36.8m

water depth

Highlights

Engineering, procurement, fabrication, transportation, installation and commissioning for topside module and the jacket plus piles

The project reached one million work hours without a lost-time incident during the fabrication of the platform at the Jebel Ali yard in Dubai. Another impressive milestone was the safe and successful stacking of deck level one and double bottom which was conducted in a tandem lift involving an arrangement of six cranes. This complex operation had a lift weight of 1,962 MT and represented the heaviest stacking ever performed at Jebel Ali.

Offshore Wind

Location

Offshore Germany

Scope

EPFC