中国电机工程学报2025，Vol.45Issue(17)：6979-6992,中插32,15.DOI:10.13334/j.0258-8013.pcsee.240760
计及护套环流和时变导体电阻的隧道电缆系统暂态温升仿真分析
Transient Temperature Rise of Tunnel Cable System Considering Sheath Circulation and Time-varying Conductor Resistance
摘要
Abstract
Analysis of transient temperature rise in tunnel cables is a critical factor in determining the safe and stable operation of tunnel cable systems.The Laurent series expansion is introduced to simplify the process of solving the node admittance matrix,so as to obtain the distribution of metal sheath circulation along the entire tunnel cable.Considering the asymmetrical laying method of tunnel cables and the impact of varying temperatures on conductor resistance,in conjunction with the IEC-60853 standard,calculation method is derived for the transient temperature rise in the tunnel cable system that takes the influence of metal sheath circulation and time-varying conductor resistance into account.Based on the corrected analytical model and numerical simulation method,the study on the transient temperature rise is conducted focusing on the 220 kV high-voltage tunnel cable project.The results indicates that the transient temperature rise in the cable system is influenced by multiple factors such as the laying method,laying spacing,ambient temperature,and operating load.Under daily cycle load current,with tunnel cables laid in horizontal and trefoil methods,the average relative errors between the transient temperature rises of the cable core obtained by the numerical simulation method and corrected analytical model are 3.616%and 4.515%,respectively,both within the acceptable range(less than 5%).The transient temperature rises of the outer sheath calculated by both methods are essentially consistent,with maximum temperature rise differences of 1.214 and 1.248℃,respectively.The work provides a new calculation method and a reference for engineering applications in analyzing the transient temperature rise of tunnel cable systems.关键词
隧道电缆系统/Laurent级数展开/护套环流/解析模型/数值模拟法/暂态温升Key words
tunnel cable system/Laurent series expansion/sheath circulation/analytical model/numerical simulation method/transient temperature rise分类
信息技术与安全科学引用本文复制引用
王恩哲,陈向荣,苏宁杰,张添胤,阴凯,乐军耀..计及护套环流和时变导体电阻的隧道电缆系统暂态温升仿真分析[J].中国电机工程学报,2025,45(17):6979-6992,中插32,15.基金项目
中国能源建设集团浙江省电力设计院有限公司科技项目(WS2022001).China Energy Engineering Group Zhejiang Electric Power Design Institution Co.,Ltd.(WS2022001). （WS2022001）
