余尚豫,刘刚,高子恒,李绪一,李梓华,王鹏宇
YU Shangyu,LIU Gang,GAO Ziheng,LI Xuyi,LI Zihua,WANG Pengyu

• 1:华南理工大学电力学院
• 2:广东技术师范大学自动化学院

摘要(Abstract)：

大埋深、大跨度的定向钻敷设是电缆穿越非开挖区域的常用方式，然而现有的定向钻敷设电缆输送能力评估方法未考虑深层地温的影响，导致结果偏保守。为此，首先分析大埋深定向钻敷设电缆的实际传热过程，论证了传统计算方法的局限性。随后建立定向钻敷设电缆的三维温度场仿真模型，以评估电缆的真实输送能力；为达到与直埋敷设电缆相当的输送能力，提出基于高导材料回填的输送能力提升方案。最后构建考虑轴向传热与深层地温双重影响的定向钻敷设电缆准三维热路模型，对回填高导热材料后电缆导体热点温度进行快速评估。仿真结果表明，在不同工况下，基于准三维热路模型的热评估算法最大误差不超过2.5℃，能够满足工程应用上对电缆热评估的精度要求。
Directional drilling installation of cables at great depths and spans is a common method for crossing nonexcavated areas. However, existing methods for assessing the ampacity of cables installed via horizontal directional drilling(HDD) do not account for the influence of deep soil temperatures, leading to underestimated calculation results. To address this, the actual heat transfer process of cables installed via HDD at great depths is analyzed, demonstrating the limitations of conventional calculation methods. A three-dimensional temperature field simulation model is then established to evaluate the real cable ampacity. To achieve an ampacity comparable to direct-buried cables, an enhancement scheme based on high thermal conductivity material backfilling is proposed. Finally, a quasi-three-dimensional thermal circuit model considering both axial heat transfer and the effects of deep soil temperature is developed for rapid evaluation of the conductor hotspot temperature after backfilling with high thermal conductivity materials. Simulation results show that, under various working conditions, the thermal evaluation algorithm based on the quasi-three-dimensional thermal circuit model has a maximum error of no more than 2.5° C, which meets the accuracy requirements for cable thermal evaluation in engineering applications.

关键词(KeyWords)： 电力电缆;定向钻敷设;输送能力;深层地温;轴向传热;高导热材料
power cable;HDD installation;ampacity;deep soil temperature;axial heat transfer;high thermal conductivity material

Abstract:

Keywords:

基金项目(Foundation): 广东省基础与应用基础研究基金（2024A1515240077）;; 广东省绿色能源技术重点实验室资助项目（2008A060301002）

作者(Author): 余尚豫,刘刚,高子恒,李绪一,李梓华,王鹏宇
YU Shangyu,LIU Gang,GAO Ziheng,LI Xuyi,LI Zihua,WANG Pengyu

DOI: 10.19585/j.zjdl.202604011

参考文献(References)：

• [1]张泽晋，陈彦伊，廖雁群，等.高压电缆外护套特征阻抗建模及破损检测方法[J].浙江电力，2024,43(9):78-87.ZHANG Zejin,CHEN Yanyi,LIAO Yanqun,et al.Characteristic impedance modeling and damage detection method for high-voltage cable sheath[J].Zhejiang Electric Power,2024,43(9):78-87.
• [2]朱金华，朱汉山，王恩哲，等.高温超导电缆研究现状及应用场景分析[J].浙江电力，2023,42(7):26-37.ZHU Jinhua,ZHU Hanshan,WANG Enzhe,et al. Research status and application scenario analysis of high temperature superconducting cable[J]. Zhejiang Electric Power,2023,42(7):26-37.
• [3]梁永春，王婧雅.基于热路模型和瞬态伴随模型的直埋电缆暂态缆芯温升计算[J].高电压技术，2022,48(9):3517-3525.LIANG Yongchun,WANG Jingya.Transient temperature rise calculation of buried power cable based on thermal circuit model and transient adjoint model[J]. High Voltage Engineering,2022,48(9):3517-3525.
• [4]王霞，陈宇奇，陈润邦，等.聚乙烯分子链结构差异对其介电性能的影响[J].绝缘材料，2024,57(8):114-121.WANG Xia,CHEN Yuqi,CHEN Runbang,et al. Effect of molecular chain structure of polyethylene on its dielectric performance[J]. Insulating Materials,2024,57(8):114-121.
• [5]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.
• [6]曾少华.武汉青山区城市电网电缆通道顶管施工与控制技术[J].工程建设与设计，2025(10):119-121.ZENG Shaohua. Construction and control technology of pipe jacking for urban power grid cable tunnel in Qingshan district,Wuhan[J]. Construction&Design for Engineering,2025(10):119-121.
• [7]张杨，马家宸.新时期高压输电电缆敷设方式的选择分析[J].电工技术，2024（增刊2）:84-86.ZHANG Yang,MA Jiachen. Analysis of the selection of high voltage transmission cable laying methods in the new era[J].Electric Engineering,2024(S2):84-86.
• [8]LI X H,WANG P Y. Investigation on the improvement method of ampacity for cable in duct bank:Using the mixed filler with high thermal conductivity material and phase change material[J]. Electric Power Systems Research,2024,229:110142.
• [9]梁永春，王忠杰，刘建业，等.排管敷设电缆群温度场和载流量数值计算[J].高电压技术，2010,36(3):763-768.LIANG Yongchun,WANG Zhongjie,LIU Jianye,et al.Numerical calculation of temperature field and ampacity of cables in ducts[J]. High Voltage Engineering,2010,36(3):763-768.
• [10]梁永春，闫彩红，赵静，等.排管敷设电缆群暂态温度场和短时载流量数值计算[J].高电压技术，2011,37(4):1002-1007.LIANG Yongchun,YAN Caihong,ZHAO Jing,et al.Numerical calculation of transient temperature field and sortterm ampaticty of group of cables in ducts[J].High Voltage Engineering,2011,37(4):1002-1007.
• [11]周强辉，杨廷方，高敏翔，等.基于有限元法的排管敷设电缆温度场和载流量的计算研究[J].电力学报，2023,38(5):397-404.ZHOU Qianghui,YANG Tingfang,GAO Minxiang,et al.Research on temperature field and ampacity of cable laid in pipe laying based on finite element method[J].Journal of Electric Power,2023,38(5):397-404.
• [12]高建，张浩然，张可，等.高压电缆缓冲层烧蚀缺陷超声检测实验[J].电力工程技术，2024,43(1):174-180.GAO Jian,ZHANG Haoran,ZHANG Ke,et al. Experiments on the ultrasonic detection of buffer layerablation defects in high-voltage cables[J].Electric Power Engineering Technology,2024,43(1):174-180.
• [13]龚渝涵，李俊娜，田君杨，等.典型变电站沟内线缆HEMP耦合仿真研究[J].智慧电力，2024,52(4):47-53.GONG Yuhan,LI Junna,TIAN Junyang,et al.Simulation study on HEMP coupling of cables in the trench of typical substation[J].Smart Power,2024,52(4):47-53.
• [14]陈赛慧，陈科技，孙永军，等.双回路顶管隧道敷设下电力电缆多物理耦合场及载流量的数值分析[J].电工技术，2022(13):62-65.CHEN Saihui,CHEN Keji,SUN Yongjun,et al.Numerical calculation of coupled multi-physical field and the rated current for double-circuit cables under pipe jacking-tunnels[J].Electric Engineering,2022(13):62-65.
• [15]石银霞，刘毅刚，王晓兵，等.220 kV麒天甲乙线电缆载流量分析[J].南方电网技术，2012,6(1):63-65.SHI Yinxia,LIU Yigang,WANG Xiaobing,et al.Analysis on the cable ampacity of 220 kV Qilin-Tianhe linesⅠ&Ⅱ[J]. Southern Power System Technology,2012,6(1):63-65.
• [16]陈文教，郑志豪，徐研，等.基于高导热管道提升排管敷设下的电力电缆载流量的研究[J].绝缘材料，2022,55(2):97-103.CHEN Wenjiao,ZHENG Zhihao,XU Yan,et al.Research on improving cable capacity under duct laying based on high thermal conductivity pipeline[J].Insulating Materials,2022,55(2):97-103.
• [17]曾含.电缆沟回填低热阻介质下三芯电缆的热评估研究[D].广州：华南理工大学，2022.ZENG Han. Study on thermal evaluation of three-core cable in cable trench backfilled with low thermal resistance medium[D].Guangzhou:South China University of Technology,2022.
• [18]张鸣，樊友兵，刘松华，等.采用低热阻系数回填材料提升穿管敷设电缆载流量[J].高电压技术，2016,42(8):2394-2398.ZHANG Ming,FAN Youbing,LIU Songhua,et al. Improvement in power cables ampacity in ducts by using low thermal resistivity backfill material[J].High Voltage Engineering,2016,42(8):2394-2398.
• [19]OC??O??P,BITTELLI M,CISEK P,et al. The performance analysis of a new thermal backfill material for underground power cable system[J].Applied Thermal Engineering,2016,108:233-250.
• [20]OC??O??P,CISEK P,MATYSIAK M.Analysis of an application possibility of geopolymer materials as thermal backfill for underground power cable system[J]. Clean Technologies and Environmental Policy,2021,23(3):869-878.
• [21]AL-DULAIMI A A,TAHIR G??NE??ER M,ALI HAMEED A.Investigation of thermal modeling for underground cable ampacity under different conditions of distances and depths[C]//2021 5th International Symposium on Multidisciplinary Studies and Innovative Technologies(ISMSIT). October 21-23,2021,Ankara,Turkey.IEEE,2021:654-659.
• [22]SULEIMAN B M,DAOUDI K,ATTAELMANAN A G,et al.Modified clay as thermal backfill material for buried electrical cables[J].Thermal Science and Engineering Progress,2020,19:100589.
• [23]李红发，程绍兵，王金城，等.回填低热阻材料对排管敷设电缆载流量的提升研究[J].绝缘材料，2022,55(3):84-92.LI Hongfa,CHENG Shaobing,WANG Jincheng,et al.Study on improving ampacity of cables laid in pipes by backfilling low thermal resistance materials[J].Insulating Materials,2022,55(3):84-92.
• [24]RAMIREZ L,ANDERS G J.Cables in backfills and duct banks-Neher/McGrath revisited[J]. IEEE Transactions on Power Delivery,2021,36(4):1974-1981.
• [25]李俊，刘刚，李立浧.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 Licheng. Study on optimization of thermal evaluation model for pipe cluster laying cable[J].Guangdong Electric Power,2023,36(5):115-125.
• [26]朱文.顶管敷设高压电力电缆的温度场与载流量计算研究[D].广州：华南理工大学，2018.ZHU Wen.Study on calculation of thermal distribution and ampacity for high-voltage power cables in trenchless pipejacking[D].Guangzhou:South China University of Technology,2018.
• [27]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.
• [28]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.
• [29]NAKAMURA S,MOROOKA S,KAWASAKI K.Conductor temperature monitoring system in underground power transmission XLPE cable joints[J].IEEE Transactions on Power Delivery,1992,7(4):1688-1697.
• [30]HAHNE E,GRIGULL U. Formfaktor und formwiderstand der station??ren mehrdimensionalen w??rmeleitung[J].International Journal of Heat and Mass Transfer,1975,18(6):751-767.
• [31]CHIPPENDALE R D,PILGRIM J A,GODDARD K F,et al.Analytical thermal rating method for cables installed in J-tubes[J]. IEEE Transactions on Power Delivery,2017,32(4):1721-1729.
• [32]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.
• [33]许志锋.局部穿管电缆载流量评估与提升方法研究[D].广州：华南理工大学，2021.XU Zhifeng. Research on calculation and improvement methods for ampacity of cable installed in short-conduit[D].Guangzhou:South China University of Technology,2021.