Transmitting electricity across vast distances, even continents, is achieved by building interconnected supergrids using both overhead and underground power lines. This process primarily relies on two key technologies:

1. High-Voltage Direct Current (HVDC) Lines: As the most efficient method for long distances, HVDC is used to create energy "highways" that connect large-scale, often renewable, power generation sites (e.g., in deserts or remote regions) to major cities. HVDC submarine cables are also a key component for transmitting power between continents or across bodies of water.

2. Ultra-High Voltage (UHV) Transmission: By using voltages of 800kV and higher, UHV transmission (both AC and DC) allows for an even greater volume of power to be transmitted with minimal losses, making it ideal for the backbone of national and international grids.

The successful construction and maintenance of these supergrids require highly specialized and robust equipment. Ningbo Changshi is a leading provider of the overhead and underground equipment necessary for these projects. From hydraulic OHTLstringingequipment.com/Hydraulic-Conductor-Tensioners.html target='_blank'>Tensioners and pullers for stringing massive conductor bundles to cable laying equipment for sub-sea or underground routes, we offer the one-stop supply and services that make these ambitious, long-range transmission projects possible.