Borlink™ extruded high voltage direct current technology sets new record at 640 kilovolt

The record-breaking voltage level and the robustness of a cable system based on Borlink™ LS4258DCE and Borlink™ LE0550DC was proven by way of successful type and pre-qualification testing in accordance with Cigré recommendation TB496. This innovative material technology enables the efficient delivery of even more transmission capacity over longer distances, better interconnectivity among countries and grids, and better connection of renewable energy sources to future grids.

Building on over 15 years experience in extruded HVDC cable material technology for even higher voltage

As a global leading innovator, Borealis is building on its over 15 years of operational experience in extruded HVDC materials and its proprietary Borlink™ technology to set ever higher standards in proven system performance. This new step-change in electrical performance has been made possible due to the unique properties offered by tailored polymers based on Borlink, in combination with the high levels of chemical and physical cleanliness these compounds offer. Production of these tailor-made compounds takes place at Borealis’ state-of-the-art facilities in Stenungsund, Sweden and Antwerp, Belgium.

This HVDC innovation was developed in partnership with nkt cables. It was first unveiled in 2014 at the Cigré Session in Paris, France, after a record-breaking 525 kV proven performance level based on Borlink LS4258DCE and the semicon Borlink LE0550DC.The same HVDC material solution based on cross-linked polyethylene (XLPE) now offers the next level of performance. By leveraging their combined industry experience and proven track records, both companies have now set the 640 kV record. This is the highest voltage ever for extruded HVDC technology, therefore a clear proof of system robustness and technical margin.

In real terms, one pair of 640 kV HVDC extruded cables can transmit over 3 gigawatt (GW) of power from renewable sources. This is equal to the combined output of the six biggest hydroelectric power plants in Sweden. Put another way, a single pair of 640 kV extruded HVDC cables could for example transmit enough green power to supply about three million households. This equals around 80% of the 3.8 million Austrian households.

The broader significance of this HVDC innovation is apparent when considering the challenges and opportunities faced by the energy industry. HVDC connections can deliver power over longer distances with less energy loss, and are thus well suited for subsea and underground applications, including transmission from offshore windfarms. The innovation addresses the need for better interconnection of countries and grids, increased transmission capacity, efficiency, and supply security.

“Value Creation through Innovation dictates that we continue to push the envelope in developing and enhancing our Borlink technology,” explains Bart Verheule, Borealis Head of Marketing, Energy. “Our step-change Borlink HVDC technology will help cable manufacturers to make electricity grids more powerful and efficient. It represents a tangible contribution to better, more sustainable energy management, and embodies our mission of Bringing Energy All Around.”