The EstLink 1 HVDC transmission system to be upgraded with advanced MACH?1 control and protection system to enhance power security in the Baltic region and the unified European electricity market with secured reliability and availability.. The Harku high-voltage direct current converter station, the Estonian side of EstLink 1 Zurich, February 29, 2024 – Hitachi Energy has won an order to provide Fingrid and Elering, transmission system operators in Finland and Estonia, with an extensi...