电缆的输电容量主要受到其绝缘热稳定水平的限制,但影响电缆本体温度的各种非线性因素很多,传统计算电缆热场的方法难于计算环境参数微小变化引起的电缆本体温度变化.为了研究电缆芯的动态温度响应,通过建立电缆的热网络模型,利用灵敏度分析的方法对每个可能引起电缆线芯温度波动的因素进行评估,重点对电缆表面温度和直埋深度的变化进行分析,并对比了实测值,证明了所提出的方法是可行的和有效的.%The current carrying capacity of cable is mainly limited by its heat-stable level, and its temperature is affected by so many different kind of non-linear factors that it's hard to calculate the temperature change with the variations of enviromental parameters by using the traditional method. In order to investigate the dynamic temperature response of cable core, this paper builds up a thermal network model for the cable, and evaluates the effects of various possible factos on the cable temperature with the sensitivity analysis method, especially that of the cable direct burial depth, and on the cable surface temperature. In comparison with the measurement temperature values, it proves that the proposed method is feasible and efficient.
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