Marinus Link
| Marinus Link | |
|---|---|
| Location | |
| Country | Australia |
| General direction | bidirectional |
| From | Heybridge, Tasmania |
| To | Hazelwood, Victoria |
| Construction information | |
| Manufacturer of conductor/cable | Prysmian |
| Manufacturer of substations | Hitachi |
| Expected | 2030 |
| Technical information | |
| Type | subsea cable |
| Type of current | HVDC |
| Total length | 345 km (214 mi) |
| Power rating | 750 MW |
| DC voltage | 320 kV |
Marinus Link is a proposed 750 megawatt capacity high voltage direct current (HVDC) electricity interconnector, to strengthen the connection between the Australian states of Tasmania and Victoria, on Australia's National Electricity Market. Due to inflation, Marinus link was scaled back from an initial plan of 1500 MW via two cables, down to 750 MW via one cable with negotiations to continue on a second cable.
It involves approximately 250 km of subsea cables and approximately 90 km of underground land cables. Marinus Link will also incorporate significant optical fibre capacity for system control, with the remaining capacity available to strengthen telecommunications and data connectivity between the regions. Marinus Link will be supported by approximately 220 km of high voltage alternating current (HVAC) of proposed transmission developments in North West Tasmania, known as the North West Transmission Developments (NWTD). Collectively, Marinus Link and the North West Transmission Developments are known as Project Marinus. In October 2022, authorities pledged loans for the project, as well as supporting facilities such as pumped hydro in Tasmania.
Stage 1 of the project is expected to commence construction in 2026 with completion in 2030. On the 1st of August 2025, Marinus Link announced Stage 1 will proceed after final investment decision was made by shareholders. The project received federal environmental approval on the 3rd of August.