Research and Analysis on Mathematical Model of Temperature Rise Threshold at Electrical Contact Position of Ring Main Unit Cable Head

LU Depeng; HAN Dong; WU Xiwei; HUANG Jing

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Research and Analysis on Mathematical Model of Temperature Rise Threshold at Electrical Contact Position of Ring Main Unit Cable Head

更新时间：2025-06-18

- Research and Analysis on Mathematical Model of Temperature Rise Threshold at Electrical Contact Position of Ring Main Unit Cable Head
- High Voltage Apparatus Pages: 1-11(2025)
- 作者机构：
  
  1.南瑞集团（国网电力科学研究院）有限公司，江苏　南京　 211106
  2.国家电网公司（常州）电气设备监测中心，江苏　常州　 213001
- 作者简介：
- 基金信息：
  
  State Grid Electric Power Research Institute (Development and Application of 12 kV High-performance and Environmentally Friendly Ring Main Unit Equipment)
- DOI：
  CLC：
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LU Depeng, HAN Dong, WU Xiwei, et al. Research and Analysis on Mathematical Model of Temperature Rise Threshold at Electrical Contact Position of Ring Main Unit Cable Head[J/OL]. High voltage apparatus, 2025, 1-11.
DOI：

LU Depeng, HAN Dong, WU Xiwei, et al. Research and Analysis on Mathematical Model of Temperature Rise Threshold at Electrical Contact Position of Ring Main Unit Cable Head[J/OL]. High voltage apparatus, 2025, 1-11. DOI：

摘要

环网柜电缆头温升是反映其运行状况的一个重要指标，通过温升阈值判断其是否存在电接触缺陷可提高产品安全运行水平。文中通过温升试验研究了环网柜电缆头电接触部位的稳定温升与负荷电流之间的关系，并在此基础上建立了温升预警阈值数学模型。通过试验验证了温升预警阈值数学模型的正确性，为环网柜电缆头温升在线监测和预警系统提供了可靠的判断依据。

Abstract

The temperature rise of the ring main unit cable head is an important index to reflect its operation condition. Judging whether there is electrical contact defect through the temperature rise threshold can improve the safe operation level of the product. This paper studies the relationship between the stable temperature rise and the load current at the electric contact part of the ring main unit through the temperature rise test

and establishes the mathematical model of the temperature rise warning threshold on this basis. The correctness of the mathematical model of temperature rise early warning threshold is verified by experiments

which provides a reliable basis for the on-line monitoring and early warning system of temperature rise of cable head of ring main unit.

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references

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