Murraylink

{{Short description|HVDC underground power line in Australia}}

{{Use Australian English|date=May 2024}}

{{Use dmy dates|date=July 2019}}

{{Infobox power transmission line

| name = Murraylink

| photo =

| caption =

| map = {{maplink |type=line |frame=yes |plain=yes |frame-align=center |zoom=6}}

| country = Australia

| state =

| province =

| coordinates = {{Coord|34|17|37|S|142|14|20|E|type:landmark|name=Red Cliffs Static Inverter Plant}}
{{Coord|34|14|17|S|140|36|01|E|type:landmark|name=Berri Static Inverter Plant}}

| direction =

| start = Berri, South Australia

| through =

| finish = Red Cliffs, Victoria

| par =

| owner = Energy Infrastructure Investment

| partners =

| operator = APA Group

| cable_manufacturer = ABB

| cable_installer =

| cable_layer =

| substation_manufacturer =

| substation_installer =

| contractors =

| construction =

| est = 2002

| decom =

| type = underground cable

| current_type = Light HVDC

| length = 180

| capacity = 220 MW

| AC_voltage = 132 kV (Berri)
220 kV (Red Cliffs)

| DC_voltage = ±150 kV

| poles_no = 2

| circuits_no =

}}

Murraylink is an Australian high voltage direct current electricity transmission link between Berri in South Australia and Red Cliffs in Victoria, connecting the two state electricity grids. Murraylink was commissioned in 2002 and is believed to be the world's longest underground transmission system and cost more than A$177 million. It was built by TransEnergie Australia, a subsidiary of Hydro-Québec. It was sold to the Australian Pipeline Trust (APA Group) in March 2006 for A$153 million. In December 2008 ownership of Murraylink (as well as Directlink) was transferred to the newly formed Energy Infrastructure Investments Group, while APA continued as the operator.[https://www.aer.gov.au/system/files/Directlink%20-%20amended%20cost%20allocation%20method.pdf Electricity Transmission Network Service Providers - Directlink and Murraylink amended Cost Allocation Methodologies - March 2010] The ownership of EII is APA with 19.9%, with the balance with Japan-based Marubeni Corporation with 49.9% and Osaka Gas with 30.2%.[https://www.apa.com.au/our-services/other-energy-services/electricity-transmission-interconnectors/ electricity interconnectors]