Wang Yanwen and Zhang Xuran. Research on Spontaneous Cable Fire Early Warning Based on Thermal Circuit Model with Distribution Parameters. Dynamic Systems and Applications 29 (2020) No. 8, 2557 – 2570

https://doi.org/10.46719/dsa20202983

ABSTRACT:
The hazards and processes of cable fires were studied to study the early characteristics of spontaneous cable fires and guarantee the safety and stability of power transmission. Cable current-carrying capacity and temperature experiments were carried out, and the measured results and the correlation between the cable core and skin temperature were obtained by applying step current on the cables. A cable thermal circuit model was built based on distributed parameters, and a method based on differential equations for calculating the core temperature of a three-core cable was proposed. The feasibility and accuracy of using differential equations to solve the thermal circuit model with distribution parameters was verified. The research result was shown that: the thermal circuit model with distribution parameters has high accuracy, and can be used in the application of spontaneous cable fire early warning.

Keywords: power cable; spontaneous cable fire; thermal circuit model based on distributed parameters; fire early warning; differential equations.