GKK Etzenricht, abbreviation for Gleichstromkurzkupplung) Etzenricht, that means Etzenricht HVDC-back-to-back station was an HVDC back-to-back facility near Etzenricht in the district of Neustadt in Bavaria, Germany. It was built up on area of Etzenricht substation, a 380 kV/220 kV/110 kV-substation, which went in service in 1970 and expanded afterwards several times.