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Compact Overhead Transmission Line
- Nov 27, 2018 -

Through the compact overhead transmission line, the line transmission capacity can be improved to reduce the number of transmission circuits and reduce the land used for the line corridor. The basic principle is as follows: optimize the wire arrangement by increasing the distance between the phase-split wire sub-wires, compress the phase-to-phase distance, and distribute the charge uniformly on the surface of each wire, so that the surface field strength uniform wire conductive area is fully utilized; The reduction causes the positive sequence capacitance of the line to rise. The wave group resistance (Z) of the line is inversely proportional to the square root of the capacitance (C) and proportional to the square root of the inductance (L). Compact power transmission can significantly improve transmission capacity, generally increasing by 30%-70. In the meanwhile, use the overhead composite insulator can effectively supports the wire and prevents the current from returning to the ground.