Abstract
AbstractIn recent years, the transmission voltage level of the power grid has been continuously improved, and the layout of a large AC-DC interconnected power grid has formed with the original AC power grid. Due to the limitation of urban space and beauty, more and more overhead lines are transformed into cable lines. As a result, the underground cable transmission space is more and more tense, and even the phenomenon of parallel laying of AC and DC lines appears. In this paper, the actual cable tunnel model is established, and the electric field distribution of AC and DC cables parallel laying in the tunnel is simulated and analyzed. The results show that the alternating magnetic field of the AC cable has a certain influence on the electric field of the DC cable. In order to reduce the impact, the arrangement of the AC cables and the location of the AC and DC cables in the tunnel should be changed.KeywordsDC cableAC cableElectromagnetic induction
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