Optimization and Application of Analytical Calculation Model of Underground Cable Group

LIANG Yongchun; WANG Xiangyu; FU Chenzhao

doi:10.13296/j.1001-1609.hva.2020.09.024

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Optimization and Application of Analytical Calculation Model of Underground Cable Group

更新时间：2025-04-26

- Optimization and Application of Analytical Calculation Model of Underground Cable Group
- High VoltageApparatus Vol. 56, Issue 9, Pages: 166-171+178(2020)
- 作者机构：
  
  1. 河北科技大学
  2. 上海电力科学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.09.024
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]梁永春,王翔宇,傅晨钊.地埋电缆群解析计算模型的优化及应用[J].高压电器,2020,56(09):166-171+178.

LIANG Yongchun, WANG Xiangyu, FU Chenzhao. Optimization and Application of Analytical Calculation Model of Underground Cable Group[J]. High voltageapparatus, 2020, 56(9): 166-171+178.
[1]梁永春,王翔宇,傅晨钊.地埋电缆群解析计算模型的优化及应用[J].高压电器,2020,56(09):166-171+178. DOI： 10.13296/j.1001-1609.hva.2020.09.024.

LIANG Yongchun, WANG Xiangyu, FU Chenzhao. Optimization and Application of Analytical Calculation Model of Underground Cable Group[J]. High voltageapparatus, 2020, 56(9): 166-171+178. DOI： 10.13296/j.1001-1609.hva.2020.09.024.

摘要

土壤外部热阻是埋地电缆载流量的重要影响因素之一

其计算模型的准确性对电缆温度场和载流量的准确评估具有重要意义。由于土壤外部热阻主要受电缆外径、埋深和发热量的影响

首先采用Ansys软件和IEC-60287标准计算公式相结合

求取了不同变量值下外部热阻的大量样本数据

然后利用多变量线性回归分析的方法对样本数据进行拟合

得到了综合电缆外径、埋深和发热量等因素的地埋电缆外部土壤热阻的计算模型。为了验证计算模型的准确性

分别以单回路、双回路、三回路XLPE电缆群为例

利用计算模型计算了不同工况下的缆芯温度

并与Ansys计算结果和IEC-60287计算结果进行了对比

比较结果表明所得到的计算模型比IEC-60287更接近于有限元仿真结果

便于在保证准确性的前提下实现工程应用。

Abstract

The external thermal resistance of soil is one of the important factors influencing the load flow of buried cable.The accuracy of the calculation model is of great significance for the accurate evaluation of cable temperature field and load flow.Firstly using the Ansys software and combining the calculation formula of IEC-60287 standard

the external thermal resistance of soil is mainly influenced by the cable diameter

the buried depth and the calorific value

which is under different variable values to calculate the external thermal resistance of a large number of sample data

and then the method of using a multivariate linear regression analysis was carried out on the sample data fitting

the comprehensive factors such as cable diameter

buried depth and calorific value of buried cable outside the calculation model of soil thermal resistance.In order to verify the accuracy of the calculation model

which is used to calculate the core temperature under different working conditions

respectively by single loop described

properties

double circuit

three loop cable group as an example

and with the Ansys calculated results and the IEC-60287 compares the calculation results

the comparison results show that the calculation model of IEC-60287 is closer to the finite element simulation results

ensuring the premise of guarantee the accuracy of the engineering application.

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