多回路高压电缆金属护套环流计算研究与分析

摘要

当高压电缆接地方式不正确,金属护套发生破损或电缆屏蔽层发生断裂破损时,电缆护套环流均会产生变化,因此电缆护套环流可作为判别电缆是否正常运行的重要检测项之一,现实中高压电缆多采用多回电缆并列敷设,使得长距离、多回路的单芯高压电缆线路护套环流问题更加复杂.根据多回路电缆护套环流的模型,设计出一种可计算多回路任意排列电缆的护套环流计算软件,并结合现场实验案例验证了软件的可靠性,同时通过软件计算得出理想的电缆排列方式,为未来电缆敷设提供一定的依据.%When cable grounding method is not correct,metallic sheath damages,or cable shielding layer fracture damage occurs,the cable sheath current circulation will be transformed,so the cable sheath circulation can be used as one of the important inspection item to identify whether cable running normally.In reality,the use of high-voltage cable to cable laying side by side,making long distance,high-voltage cable sheath circulation problem of single core multi-loop is more complex.So a calculation of multi loop arbitrarily arranged cable sheath current calculation software combined with field test case is designed which based on multi-loop cable sheath circulation model,the reliability of the software is verified through software to calculate the ideal cable arrangement,and the cable laying provides certain basis for the future.