Simply

feasibly

quickly and accurately assessing the real time temperature rise of cable is the base to release potential transmission capacity and improve operation efficiency. At present

the methods for assessing the temperature rise of cable core mainly includes measurement and calculation methods. The thermal circuit model of transient temperature rise of cable group introducing balance thermal resistance and thermal sensitivity is proposed with reference to the thermoelectric analogy method. However

in practical operation

the operating environment of the cable is much more complex. Such factors as the number of cable loop number and magnitude of load fluctuation may likely affect the accuracy of the mode. For fully validating the adaptability of the thermal circuit model

a finite element calculation example of the transient temperature rise of cable group is constructed at a complex environment and condition in this paper and compared with the thermal circuit model result. The verification result shows that

for different impact factors

the original thermal circuit model can be adjusted and extended flexibly without change of the parameter solving method and both convenience and accuracy of the model are free from influence. The loop number of cable

medium uniformity

load fluctuation magnitude

sunshine and environmental temperature variation do not remarkably reduce the accuracy of the model. The research results not only verify the model

but also provide an important reference for the test method of similar models.