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采用回流导体能提升单芯海底电力电缆载流量,但是目前国内缺少回流导体对海底电缆载流量影响的相关研究。为此,在IEC 60287标准基础上建立两种不同回流导体结构海底电缆的集中参数热路模型以及相应的载流量计算方法,分析了不同结构的回流导体对高压海底电缆损耗和载流量的影响,评估了不同截面积的回流导体对海底电缆损耗和载流量的影响。结果表明,内部回流导体能够有效降低电缆损耗,从而提升电缆载流量;回流导体截面积从0 mm~2增加到500 mm~2,电缆载流量也随之增加34.7%。所研究的结果能够为具有回流导体结构的海底电缆的设计和选型提供理论依据。
The use of return conductors can improve the single core power cable current carrying capacity, but the current lack of return conductors on the submarine cable current-carrying capacity of the relevant research. Therefore, based on the IEC 60287 standard, two kinds of centralized parameter hot-circuit model of submarine cable with different return conductor structure and the corresponding calculation method of current carrying capacity are established. The influence of different structure of return conductors on the loss and current carrying capacity of high- The influence of different cross-sectional area of return conductors on the cable loss and current carrying capacity was evaluated. The results show that the internal return conductor can effectively reduce the cable loss and improve the cable current carrying capacity. The cross-sectional area of the return conductor increases from 0 mm to 2 to 500 mm ~ 2, and the cable current carrying capacity increases by 34.7%. The results of this study can provide a theoretical basis for the design and selection of submarine cables with return-conductor structure.