Hitachi Energy

Hitachi Energy (and its HVDC predecessor businesses) has supplied multiple converter-station technology upgrades for Konti-Skan 2. At the Lindome converter station on Pole 2, the company introduced advanced filtering solutions, including the world’s first active DC filter (1991) and the first electronically controlled AC filter, ConTune (1993), improving harmonic performance and dynamic voltage control. In 2019, Hitachi Energy returned to the scheme with a major contract, valued at about USD 30 million, to upgrade the control and protection system for the entire Konti-Skan HVDC link using its MACH modular advanced control platform. The 2019 scope covered design, manufacture and installation of new digital control and protection hardware and software for the converter stations, migration from legacy systems, and commissioning, thereby enhancing reliability, redundancy and long-term serviceability of the Pole 2 converters and the overall bipole.