Alternating current cable operation current-carrying capacity and determination step thereof

The method comprises the steps of providing the operation current-carrying capacity of the alternating-current cable and opening the operation current-carrying capacity of the alternating-current cable. The current-carrying capacity of a traditional AC cable (nominal) is obtained according to an IEC algorithm, and loss temperature rise generated by the operation state of an internal sheath and armored multiple conductors of the cable is not considered. The alternating-current cable operation current-carrying capacity provided by the invention refers to the current-carrying capacity when the alternating-current cable is connected to a power grid in an operation state. Meanwhile, temperature rise caused by loss of conductors (core wires, sheaths and armors) and media of the cable when the cable is connected to a power grid for operation is considered. Different from a traditional (nominal) current-carrying capacity determination step, the invention also provides a step for determining the operation current-carr