# HVDC links: Relationships

Source page: https://www.materialinsights.org/energy/e_hvdc/links/

Every element and industry that HVDC links is linked to, and how. Each pair has its own card explaining the relationships between the two.

- [AC transmission](https://www.materialinsights.org/links/ac-transmission-and-hvdc-links/): HVDC and AC lines both move bulk power, but DC wins beyond a break-even distance of roughly 300 to 800 km overhead or 50 to 100 km of cable; every DC link starts and ends in an AC grid, so the two are rivals on long routes and partners everywhere else. *(researched)*
- [Offshore wind](https://www.materialinsights.org/links/hvdc-links-and-offshore-wind/): Energy flows from offshore wind to HVDC links; their prices have moved together.
- [Transformers and power electronics](https://www.materialinsights.org/links/hvdc-links-and-transformers-and-power-electronics/): Energy flows from HVDC links to transformers and power electronics; their prices have moved together.
- [Underground, submarine and superconducting cables](https://www.materialinsights.org/links/hvdc-links-and-underground-submarine-and-superconducting-cables/): Energy flows from underground, submarine and superconducting cables to HVDC links; their prices have moved together.
- [Copper](https://www.materialinsights.org/links/copper-and-hvdc-links/): Their prices have moved together.
- [Electrical equipment](https://www.materialinsights.org/links/electrical-equipment-and-hvdc-links/): Electrical equipment depends on HVDC links.
- [Polyethylene (LDPE, LLDPE)](https://www.materialinsights.org/links/hvdc-links-and-polyethylene-ldpe-lldpe/): Their prices have moved together.
- [Pumped hydro storage](https://www.materialinsights.org/links/hvdc-links-and-pumped-hydro-storage/): Energy flows from HVDC links to pumped hydro storage.

## Other sections

- [Summary](https://www.materialinsights.org/energy/e_hvdc/index.md)
- [Overview](https://www.materialinsights.org/energy/e_hvdc/overview/index.md)
- [Correlation](https://www.materialinsights.org/energy/e_hvdc/correlation/index.md)
- [How it works](https://www.materialinsights.org/energy/e_hvdc/explain/index.md)
- [Efficiency and losses](https://www.materialinsights.org/energy/e_hvdc/efficiency/index.md)
- [Technology advances](https://www.materialinsights.org/energy/e_hvdc/advances/index.md)
- [Value chain](https://www.materialinsights.org/energy/e_hvdc/valuechain/index.md)
- [Geopolitics and regulation](https://www.materialinsights.org/energy/e_hvdc/geopolitics/index.md)
- [Unit economics](https://www.materialinsights.org/energy/e_hvdc/economics/index.md)
- [Impact on the biosphere](https://www.materialinsights.org/energy/e_hvdc/biosphere/index.md)