岸电电缆特殊工况分析及温度分布影响因素研究

Analysis of Special Working Conditions of the Shore Power Cable and Research of the Influencing Factors for Temperature Distribution

岸电电缆作为港口船舶供电的关键设备,受阳光直射、海风、潮汐的影响,具有运行工况复杂、绝缘老化速度快等特点,严重影响岸电电缆的使用寿命和载流能力.本文首先对岸电输电系统和岸电电缆的特殊使用工况进行分析,其次建立了温度场仿真模型研究环境温度、风速和太阳辐射对岸电电缆温度分布的影响规律,为岸电电缆的敷设优化和载流量的提升提供参考.研究结果表明:导体温度随环境温度近似线性变化,环境温度上升10℃,导体温度约增加11.66℃;风速从静止增加至10 m/s时,导体最大温度下降13.84℃;在夏季极炎热天气下,岸电电缆导体最高温度可达117.6℃,超过了最高载流温度90℃.

As the key equipment for ship power supply in aport,shore power cable is affected by direct sunlight,sea breeze and tide.It is characterized by complicated operating conditions and fast insulation aging,which seriously affects the service life and ampacity of shore power cable.In this paper,the special working conditions of the shore power transmission system and the shore power cable are analyzed,and then a temperature field simulation modelis established to study the influence of environmental temperature,wind speed and solar radiation on the shore power cable temperature distribution,so as to provide reference for optimizing the laying of the shore power cable and the improving of its ampacity.The results show that the conductor temperature changes approximately linearly with the ambient temperature.When the ambient temperature rises by 10℃,the conductor temperature increases by approximately 11.66℃;when the wind speed increases from static to 10 m/s,the maximum conductor temperature decreases by 13.84℃.In hot weather in summer,the maximum temperature of the shore power cable conductors may climb to as high as 117.6℃,which exceeds the maximum current carrying temperature of 90℃.