邵良友,崔磊,陈城,李福权,弓国军,洪钢,王鹏宇
SHAO Liangyou,CUI Lei,CHEN Cheng,LI Fuquan,GONG Guojun,HONG Gang,WANG Pengyu

• 1:深圳供电局有限公司
• 2:广东技术师范大学

摘要(Abstract)：

受制造工艺影响，电缆内部存在气隙层，但传统IEC方法忽视了气隙层对传热的影响。目前针对传统IEC方法的优化研究仍停留在稳态热评估，忽视了电缆气隙对传热的影响是随时间和温度变化的动态过程。针对该问题，建立了热-力耦合电缆仿真模型，对含气隙电缆内部热行为开展仿真分析。基于仿真结果，明确了现有IEC暂态热路模型的误差来源，并讨论了电缆绝缘径向动态热膨胀对气隙层热参数的影响。提出了计及绝缘热膨胀的电缆优化热评估算法，实现了电缆热评估的优化。通过所建立的热-力耦合电缆仿真模型验证了优化热评估算法的准确性。对比结果表明，优化热评估算法最高误差不超过4.2℃，可为在运电缆的负荷调度提供数据支撑。
Due to manufacturing limitations, air gaps inevitably exist within the internal layers of power cables. However, the conventional IEC standard method neglects the specific impact of these air gaps on heat transfer. Furthermore, current optimization research improving upon the IEC method remains constrained to steady-state thermal assessment, failing to recognize that the influence of cable air gaps on heat transfer is a dynamic process varying over both time and temperature. To address this issue, thermal-mechanical coupled simulation model was established to analyze the internal thermal behavior of cables containing air gaps. Based on the simulation results, the error sources of the existing IEC transient thermal circuit model were identified, and the specific impact of the radial dynamic thermal expansion of cable insulation on the thermal parameters of the air gap layer was discussed. An optimized cable thermal assessment algorithm that accounts for insulation thermal expansion was then proposed, achieving an enhanced evaluation of cable temperatures. The accuracy of this optimized algorithm was validated using the established thermal-mechanical coupled simulation model. The comparative results demonstrate that the maximum error of the optimized thermal assessment algorithm does not exceed 4.2℃, thereby providing reliable data support for the load dispatch of cables in service.

关键词(KeyWords)： 载流量;电缆暂态热评估;皱纹铝护套电缆;热膨胀;气隙层
ampacity;transient thermal assessment of cables;corrugated aluminum sheathed cable;thermal expansion;air gap layer

Abstract:

Keywords:

基金项目(Foundation): 广东省基础与应用基础研究基金（2024A1515240077）

作者(Author): 邵良友,崔磊,陈城,李福权,弓国军,洪钢,王鹏宇
SHAO Liangyou,CUI Lei,CHEN Cheng,LI Fuquan,GONG Guojun,HONG Gang,WANG Pengyu

DOI: 10.19585/j.zjdl.202610012

参考文献(References)：

• [1]舒印彪，罗安，饶宏.面向“双碳”目标的新型电力系统基础理论与关键技术专辑[J].中国科学（技术科学），2026,56(1):1.Shu Yinbiao,Luo An,Rao Hong.Special issue on fundamental theories and key technologies of new-type power system towards the“dual carbon” goals[J].Scientia Sinica Technologica,2026,56(1):1.
• [2]曾令诚，孟晨旭，罗海鑫，等.三芯电缆接头轴向温度反演模型及其材料参数敏感性分析[J].浙江电力，2024,43(8):94-103.Zeng Lingcheng,Meng Chenxu,Luo Haixin,et al.An inverse model for axial temperature in three-core cable joints and sensitivity analysis of material parameters[J].Zhejiang Electric Power,2024,43(8):94-103.
• [3]邓红雷，韩飞阳，王鹏宇，等.35 kV三芯海底电缆接地系统热烧蚀故障分析[J].浙江电力，2025,44(5):112-119.Deng Honglei,Han Feiyang,Wang Pengyu,et al.Analysis of thermal ablation faults in the grounding system of a35 kV three-core sub-marine cable[J]. Zhejiang Electric Power,2025,44(5):112-119.
• [4]余尚豫，刘刚，高子恒，等.定向钻敷设电缆输送能力评估及提升方案[J].浙江电力，2026,45(4):113-122.Yu Shangyu,Liu Gang,Gao Ziheng,et al. Ampacity assessment and enhancement scheme for power cables for HDD installation[J]. Zhejiang Electric Power,2026,45(4):113-122.
• [5]Deng H L,Gao Z H,Xing Z X,et al.Investigation on improving the asset utilization ratio of underground power transmission system through the application of heat pipe[J].Energy,2025,320:135420.
• [6]Zhang R S,Zhang S H,Wang M Z,et al.Ampacity improvement of high voltage submarine cables installed in Jtubes[J]. Electric Power Systems Research,2025,244:111562.
• [7]Gao Z H,Deng H L,Yu S Y,et al.Investigation on the ampacity improvement for directional drilling duct laid cable based on the coordination of heat pipe and high thermal conductivity material[J].Electric Power Systems Research,2025,249:112072.
• [8]Poradowski W,Anders G J.Thermal aspects of submarine cables in bend stiffeners[J]. Ocean Engineering,2025,328:121027.
• [9]吴高波，刘英，崔戎舰，等.波动负荷下风电送出海缆的温升特性研究[J].高压电器，2025,61(9):155-163.Wu Gaobo,Liu Ying,Cui Rongjian,et al.Study on temperature rise characteristic of wind-power transmission submarine cables under fluctuating current loads[J].High Voltage Apparatus, 2025,61(9):155-163.
• [10]邓繁盛，李秀峰，丁志鹏，等.温度对电缆终端界面应力影响的仿真研究[J].高压电器，2024,60(11):101-109.Deng Fansheng,Li Xiufeng,Ding Zhipeng,et al.Simulation study on influence of temperature on interface stress of cable terminal[J]. High Voltage Apparatus,2024,60(11):101-109.
• [11]刘潇镁，刘英，李文清.基于暂态电热场特性的高压直流电缆线路动态增容能力评估[J].高电压技术，2025,51(4):1674-1683.Liu Xiaomei,Liu Ying,Li Wenqing.Dynamic capacity expansion evaluation for HVDC cable lines based on transient electrical and thermal field characteristics[J]. High Voltage Engineering,2025,51(4):1674-1683.
• [12]张瀚，杨刚，庄颖璇，等.计及XLPE动态热参数特性的老化电缆载流量评估[J].广东电力，2025,38(2):57-65.Zhang Han,Yang Gang,Zhuang Yingxuan,et al.Ampacity assessment of aging cable considering XLPE dynamic thermal parameter characteristics[J]. Guangdong Electric Power,2025,38(2):57-65.
• [13]魏燕杰，刘英.氧化镁电缆的绝缘材料特性及载流量评估方法研究[J].绝缘材料，2024,57(6):108-115.Wei Yanjie,Liu Ying.Study on insulating material characteristics of MgO cable and its ampacity evaluation method[J].Insulating Materials,2024,57(6):108-115.
• [14]李欢，魏磊，张延伟，等.沟道敷设电力电缆温度场与载流量仿真研究[J].哈尔滨理工大学学报，2025,30(3):86-97.Li Huan,Wei Lei,Zhang Yanwei,et al.Simulation study on temperature field and current-carrying capacity of power cable in trench laying mode[J]. Journal of Harbin University of Science and Technology,2025,30(3):86-97.
• [15]李俊，刘刚，李立涅.排管集群敷设电缆热评估模型优化研究[J].广东电力，2023,36(5):115-125.Li Jun,Liu Gang,Li Linie.Study on optimization of thermal evaluation model for pipe cluster laying cable[J].Guangdong Electric Power,2023,36(5):115-125.
• [16]Gouda O E,Osman G F A,Salem W A A,et al.Cyclic loading of underground cables including the variations of backfill soil thermal resistivity and specific heat with temperature variation[J].IEEE Transactions on Power Delivery,2018,33(6):3122-3129.
• [17]Huang S H,Lee W J,Kuo M T.An online dynamic cable rating system for an industrial power plant in the restructured electric market[J]. IEEE Transactions on Industry Applications,2007,43(6):1449-1458.
• [18]Anders G J.Rating of electric power cables in unfavorable thermal environment[M].Hoboken:Wiley,2005.
• [19]刘刚，雷成华，刘毅刚.根据电缆表面温度推算导体温度的热路简化模型暂态误差分析[J].电网技术，2011,35(4):212-217.Liu Gang,Lei Chenghua,Liu Yigang. Analysis on transient error of simplified thermal circuit model for calculating conductor temperature by cable surface temperature[J].Power System Technology,2011,35(4):212-217.
• [20]韩卓展，刘刚，王鹏宇，等.高压电缆暂态热路中绝缘层最佳分层数的确定方法[J].广东电力，2017,30(10):28-34.Han Zhuozhan,Liu Gang,Wang Pengyu,et al.Determination method for optimal hierarchy numbers of insulation layer in transient thermal circuit of high-voltage cable[J].Guangdong Electric Power,2017,30(10):28-34.
• [21]曾含，王健，韩卓展，等.基于优化包覆层结构的高压单芯电缆暂态热路建模方法[J].广东电力，2022,35(4):87-95.Zeng Han,Wang Jian,Han Zhuozhan,et al.Transient thermal circuit modeling method for high voltage single core cable based on optimized coating layer[J]. Guangdong Electric Power,2022,35(4):87-95.
• [22]王鹏宇.计及线路间负荷关联特性的集群敷设电缆最优化选型研究[D].广州：华南理工大学，2021.Wang Pengyu.Investigation on optimal selection of cluster laying cables considering the load correlation among cable lines[D].Guangzhou:South China University of Technology,2021.
• [23]Wang P Y.Optimization for thermal rating method of high voltage cable considering the existence of air gap[J].Electric Power Systems Research,2023,217:109151.
• [24]Wang W,Bai X T,Si W R,et al. Review of calculation methods of power cables temperature based on thermal circuit model[C]//2024 IEEE 7th Advanced Information Technology,Electronic and Automation Control Conference(IAEAC). March 15-17,2024. Chongqing,China:IEEE,2024:1711-1714.
• [25]师晋生，张巧珍.平行圆柱面导热形状因子的保角变换法[J].大学物理，2022,41(3):18-20.Shi Jinsheng,Zhang Qiaozhen. Conformal transformation of steady heat conduction between two parallel eccentric cylindrical walls[J].College Physics,2022,41(3):18-20.