Calculation of transient conductor temperature of power cable and prediction of overload capacity

Due to the limitation of the production process,it is difficult to measure the conductor temperature directly. Consequently,based on the temperature of the optical fiber,the transient thermal circuit model is established. The conductor temperature can be calculated by the software programmed on the basis of the fiber temperature. To verify the theoretical analysis,the research on the power cable of constant load and cycle load transient temperature rise is made. The results show that it is accurate to calculate the conductor temperature and to forecast overload capacity based on real- time load current and optical fiber temperature.