ABB’s Power Grids business has been awarded an order from the Aibel/Keppel FELS consortium, which will design, construct, and build the High Voltage Direct Current (HVDC) transmission system for the offshore wind connection project DolWin5. ABB is the HVDC technology provider. This project will deliver 900 megawatts of zero-carbon electricity – enough to power around 1 million homes – from three wind farms some 100 km off the German coast. It is scheduled for completion in 2024.
The order includes the converter platform in the North Sea, as well as an on-shore converter station located in Emden, in the Lower Saxony region of Ger-many. TenneT, a leading European electricity transmission system operator, with activities in the Netherlands and in Germany, is responsible for providing power links to the offshore wind farms in this cluster.
ABB’s HVDC solution is used to transport the power generated by offshore wind farms very efficiently by converting the alternate current (AC) to direct current (DC) on the converter platform. That makes it possible to transmit the power through a 130-kilometer-long DC cable system with very low losses to the mainland. In the onshore converter station, the power is converted back to AC and then integrated into the transmission grid. ABB HVDC’s offshore wind connection solutions are compact and modular to specifically address the challenges of the offshore wind industry and support a substantial improvement in LCOE (Levelized Cost Of Electricity), as well as carbon foot-print.
With the use of ABB’s voltage source converter technology, commercialized under the name HVDC Light®, it is possible to keep the conversion losses very low. Additionally, the order will also include the ABB Ability™ Modular Advanced Control for HVDC (MACHTM), which is instrumental in controlling the complex connection between wind farms and the on-shore AC grid.
As part of its energy transition (“Energiewende”), Germany’s plans to generate 65 percent of its power from renewable sources by 2030. A rapidly growing pro-portion of this clean energy is generated in huge offshore wind farms in the North Sea. In just 10 years, Germany’s offshore wind production has grown from zero to 6,382 MW, making it the world’s second largest offshore wind pro-ducer after the UK.