浙江电力2026，Vol.45Issue(4)：113-122,10.DOI:10.19585/j.zjdl.202604011
定向钻敷设电缆输送能力评估及提升方案
Ampacity assessment and enhancement scheme for power cables for HDD installation
摘要
Abstract
Directional drilling installation of cables at great depths and spans is a common method for crossing non-excavated 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 re-sults.To address this,the actual heat transfer process of cables installed via HDD at great depths is analyzed,dem-onstrating 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 tem-perature 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 algo-rithm based on the quasi-three-dimensional thermal circuit model has a maximum error of no more than 2.5℃,which meets the accuracy requirements for cable thermal evaluation in engineering applications.关键词
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Key words
power cable/HDD installation/ampacity/deep soil temperature/axial heat transfer/high thermal con-ductivity material引用本文复制引用
余尚豫,刘刚,高子恒,李绪一,李梓华,王鹏宇..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):113-122,10.基金项目
广东省基础与应用基础研究基金(2024A1515240077) （2024A1515240077）
广东省绿色能源技术重点实验室资助项目(2008A060301002) （2008A060301002）
