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With obvious economic and social benefits, four-parallel lines on the same tower is widely used and has high reliability requirements, the use of live working to carry out maintenance is particularly important. This paper takes 500/220kV four-parallel lines on the same tower as the research object. First, through the analysis of the risk of 500kV and 220kV line typical operation position, it can be...
The multi-circuit transmission lines on the same tower can be considered for solving the contradiction between the growing electricity demand and the limited line corridor. Take the 500kV/220kV four-circuit mixed-voltage transmission lines as an example, the maintenance circuit would have high induced voltage and induced current because of the strong electrostatic coupling and electromagnetic coupling...
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