Direct-current power transmission cable bundling pipeline

Abstract

The invention discloses a direct-current power transmission cable bundling pipeline, and belongs to the field of large-scale long-distance ultra-high-voltage and extra-high-voltage power transmission. The direct-current power transmission cable bundling pipeline comprises an outer sheath tube (1) and 2n direct-current transmission cables (2) arranged in the outer sheath tube, all the direct-current transmission cables (2) are symmetrically distributed on the geometric center line of the outer sheath tube, and n is larger than or equal to 1 and smaller than or equal to 4. An even number of direct-current power transmission cables are clustered, all the direct-current power transmission cables are symmetrically distributed on the geometric center line of the outer-layer protective sleeve, the structure is compact and reasonable, electric field and magnetic field distribution can be optimized, and electromagnetic leakage is remarkably reduced.

Description

technical field [0001] The invention belongs to the field of large-scale long-distance ultra-high voltage and ultra-high voltage power transmission, and more specifically relates to a direct current transmission cable bundle pipeline. Background technique [0002] DC overhead lines are usually used for DC transmission lines, and cable lines are only considered when overhead lines are restricted. In the scenario of "West-to-East Power Transmission", the transmission corridor is limited, and the air in high-altitude areas is relatively thin, the required insulation distance is large, and the external insulation design and construction of overhead lines is extremely difficult. For canyon blocking points, cables are used instead of overhead lines. [0003] DC cables are generally single-core cables. The application scenarios of the existing EHVDC transmission cables are mostly island power supply and cross-sea power transmission projects. Cables are generally placed freely in...

AI Technical Summary

Problems solved by technology

[0004] However, it has the following disadvantages when it is used in the scenario of "West-to-East Power Transmission": (1) The high mountains and valleys represented by the Hengduan Mountains in western my country have high mountains, deep valleys, harsh geographical conditions, and high incidence of geological disasters. There are transmission cable pipelines facing serious and frequent earthquakes and other geological disasters; (2) The distribution of electric and magnetic fields will cause large electromagnetic leakage

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