XLPE insulated power cable with split conductor structure

Abstract

The invention discloses a cross-linked polyethylene insulated power cable with a divided conductor structure. Buffer water blocking tape, corrugated aluminum sheath and non-metallic outer sheath layer. The conductor is cabled by several fan-shaped strands to form a conductor with an overall circular cross-section. Insulation corrugations are used between each fan-shaped strand The paper is separated to insulate the strands from each other, so that the conductor is equivalent to being composed of several mutually insulated fan-shaped strands connected in parallel. Since the cross-sectional area of ​​a single strand is only a fraction of the total cross-sectional area of ​​the conductor, the "skin effect" and "proximity effect" of a single strand are greatly reduced, thereby achieving the purpose of reducing the AC resistance of the conductor.

Description

[0001] technical field [0002] The invention relates to a power cable, in particular to a cross-linked polyethylene insulated power cable with a split conductor structure. Background technique [0003] With the continuous development of cities and industrialized cities, the demand for electricity continues to increase sharply, and power facilities are developing in the direction of large-capacity (high-voltage, high-current) transmission. In order to increase the carrying capacity of cables, the method of increasing the conductor cross-section is usually used. However, due to the existence of the skin effect in the AC system, the carrying capacity of the conductor is not proportional to the increase in the cable cross-section, but when the conductor cross-section increases to a certain extent, the skin effect is serious, resulting in the conductor The AC effective resistance, that is, the AC resistance is significantly greater than its DC resistance, so increasing the condu...

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of cities and industrialized cities, the demand for electricity continues to increase sharply, and power facilities are developing in the direction of large-capacity (high-voltage, high-current) transmission. In order to increase the carrying capacity of cables, the method of increasing the conductor cross-section is usually used. However, due to the existence of the skin effect in the AC system, the carrying capacity of the conductor is not proportional to the increase in the cable cross-section, but when the conductor cross-section increases to a certain extent, the skin effect is serious, resulting in the conductor The AC effective resistance, that is, the AC resistance is significantly greater than its DC resistance, so increasing the conductor cross-section alone cannot achieve its economical practicability and effectiveness.

At present, the existing traditional circular compacted conductors will have the aforementioned more serious skin effect problem when the conductor diameter becomes larger

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