Research on Short-time Overload Current Limit for High Voltage XLPE Power Cables

CHENG Xiaoxiao; MA Jianwei; YIN Yike; GUAN Zhiyuan; LIU Wenfei; ZHANG Zhousheng

doi:10.13296/j.1001-1609.hva.2017.04.024

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Research on Short-time Overload Current Limit for High Voltage XLPE Power Cables

更新时间：2025-04-26

- Research on Short-time Overload Current Limit for High Voltage XLPE Power Cables
- High VoltageApparatus Vol. 53, Issue 4, Pages: 150-155(2017)
- 作者机构：
  
  1. 国网河南省电力公司电力科学研究院
  2. 上海电力学院电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.04.024
  CLC： TM75;TM247
- Published：2017
- 稿件说明：
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[1]程晓晓,马建伟,尹轶珂,关志远,刘文飞,张周胜.高压XLPE绝缘电力电缆短时过载电流极限研究[J].高压电器,2017,53(04):150-155.

CHENG Xiaoxiao, MA Jianwei, YIN Yike, et al. Research on Short-time Overload Current Limit for High Voltage XLPE Power Cables[J]. High voltageapparatus, 2017, 53(4): 150-155.
[1]程晓晓,马建伟,尹轶珂,关志远,刘文飞,张周胜.高压XLPE绝缘电力电缆短时过载电流极限研究[J].高压电器,2017,53(04):150-155. DOI： 10.13296/j.1001-1609.hva.2017.04.024.

CHENG Xiaoxiao, MA Jianwei, YIN Yike, et al. Research on Short-time Overload Current Limit for High Voltage XLPE Power Cables[J]. High voltageapparatus, 2017, 53(4): 150-155. DOI： 10.13296/j.1001-1609.hva.2017.04.024.

摘要

电力电缆在运行中出现检修或故障时

需要短时转移负荷

致使某些电缆短时过载。然而电缆允许过载电流极限与过载电流持续时间之间的关系缺乏相应算法及成熟标准支持

使得现场紧急转移负荷时没有可靠依据。文中根据集中热常数模型和IEC 60853模型2种暂态热路模型

研究了相应的短时过载电流极限及其持续时间的计算原理

并针对64/110 k V YJLW02单芯高压电缆进行了具体敷设的分析和比较

结果表明:基于2种模型的关系曲线变化趋势相近

但IEC 60853模型法更接近实际情况。计算方法可为电缆短时转移负荷的决策提供参考和指导。

Abstract

Maintenance and failure may occur for the power cable in the operation

and it is necessary to transfer the load to other cables urgently which results in a short-time overload of these cables. However

the relationship between the allowable overload current limit and the allowable overload current duration is short of corresponding algorithm and the mature standard

which makes no reliable basis for the emergency transfer load. In this paper

the calculation principle of the short-time overload current limit and its duration based on the two kinds of tran-sient thermal models of the IEC 60853 model and the thermal constant model is studied

and as an example

the analysis and comparison of the YJLW02 64/110 k V single core high voltage cable is carried out. The results show that the relationship curves between the current limit and the current duration of the two models are similar

but the IEC 60853 model is more close to the actual situation. The calculation method can provide reference and guidance for the decision making of short-time load transfer.

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