Overhead Transmission Line Common Fault

Overhead transmission line is the main component of power system and transmission network. It undertakes most of the transmission tasks in industry and life and is also the most prone part of the power system.

Overhead transmission line is the main component of power system and transmission network. It undertakes most of the transmission tasks in industry and life and is also the most prone part of the power system.

The common faults are classified according to the nature, which are mainly divided into instantaneous fault and permanent fault. Among them, instantaneous fault mainly includes flash-over caused by lightning over-voltage and short-circuit caused by birds. Permanent fault mostly results from climate or equipment itself Such as ice and snow weather or line aging caused by transient over-voltage breakdown transmission line insulation, equipment installation, storm, earthquakes and other transmission lines caused by the permanent short circuit and so on.

According to their specific classifications, they can be divided into horizontal and vertical faults. Among them, horizontal faults are mainly single-phase, two-phase and three-phase short circuits. Longitudinal faults are mainly one-phase and two-phase disconnection problems. These faults can easily lead to tripping of transmission lines Other accidents.

Therefore, it is necessary to find out the cause of the fault in the first time when the fault occurs, solve the problem in a targeted manner, or prevent the fault in advance.