Impact of Proximity Effect on Transmission Lines


Within the nearby conductors carrying alternating current, alternating flux forms. As a result, the circulating current flows inside the conductor, distributing current along the transmission lines. The distribution is typically not uniform, though.

All of these elements raise the conductor’s perceived resistance. The perceived resistance of the conductors is now directly impacted by this. As the resistance rises, the voltage decreases, and power is lost along the transmission lines. The proximity effect is the name given to the entire phenomenon. And after installation, these effects are visible among the tower accessories.

Impact of proximity effect on transmission lines:

A conductor’s edge may experience a concentration of current when it is conveying current in the same direction. The current, however, focuses on the closest side if it travels in the opposite direction across adjacent conductors. It is evident in both conductors. This component also intensifies the proximity impact within the tower accessories.

People’s susceptibility to the proximity effect will be lessened if they have a conductor that is running at 50 hertz. However, the rate will be higher if they use a different conductor with a 60-hertz current capability. Typically, the proximity effect is extremely important for conductors larger than 125 mm2.

Aspects that affect the proximity effect:

In the case of AC transformers and inductors, the windings are rather close together, as was already indicated. This sort of transmission is primarily characterized by the proximity effect. Additionally, the surrounding conductors are also impacted by the proximity effect.

The following variables affect this effect:

  • The more ferromagnetic the conductor’s substance, the stronger the proximity effect it will suffer.
  • Frequency: The proximity effect tends to get stronger as the frequency rises.
  • The conductor’s construction- There are two varieties of conductors. Conductors with and without strands. The proximity effect, however, is still far more pronounced in the case of a solid conductor. The proximity effect is lessened by the limited surface area of standard conductors.
  • Reducing the conductor’s surface area can be accomplished by switching solid conductors for stranded ones. And by doing so, the proximity impact inside the tower accessories will be subtly diminished.
  • Increase the voltage – If power is continuously sent over the transmission line, the current will decrease and the voltage will rise. Additionally, this minimizes the size of the conductors and the proximity effect. One should be aware of these things about Power Line Hardware.

Have they ever considered utilizing dummy conductors to increase the distance between the conductors? By doing so, the proximity effect may be diminished and the distance between two conductors increased. It can also serve as a framework to support the transmission lines.