ANALYSIS SYSTEM AND CALCULATION METHOD OF CURRENT-CARRYING CAPACITY OF CABLE BASED ON LINEAR TEMPERATURE-SENSING TECHNOLOGY

摘要

Provided are an analysis system and a calculation method of the current-carrying capacity of a cable based on linear temperature-sensing technology. The system comprises a server and, connected to the server, a distributed linear temperature-sensing system and cable load detection apparatus. The distributed linear temperature-sensing system consists of a temperature-sensing optical cable laid on the cable to be measured and, connected to the temperature-sensing optical cable, a tunable wavelength laser and light-intensity detector. The method increases the dynamic time variable when the cable is in operation to establish the dynamic correlation between the electrical current capacity, sheath surface temperature, ambient temperature, and heat radiation of the cable, and calculates therefrom the cable conductor temperature. The present system and method provide a basis for decision-making to ensure the safe operation of city cables and the rational allocation of electrical transmission capacity, and a scientific basis for scientific load scheduling.