110 kV单芯电缆缆芯暂态温度径向感知模型研究  

Transient Temperature Radial Sensing Model for Cable Cores of 110 kV Single Core Cables

作　　者：王伟平 周恒 梁国坚 张琛 张志方 WANG Weiping;ZHOU Heng;LIANG Guojian;ZHANG Chen;ZHANG Zhifang(Zhongshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Zhongshan 528400,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]广东电网有限责任公司中山供电局,广东中山528400 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《智慧电力》2023年第10期103-110,共8页Smart Power

基　　金：国家自然科学基金资助项目(U2066217);南方电网公司科技项目资助(GDKJXM20220135)。

摘　　要：为了实现基于电缆表面温度测量的电缆缆芯暂态温度实时反演,本文首先分析电缆内部径向热流扩散路径特点,建立了电缆各层结构的热阻热容集中参数等效模型,并分析热路等效模型的误差影响因素。其次开展110 kV单芯电缆本体暂态温度场有限元仿真计算,分析了交联聚乙烯绝缘层分层建模的必要性,并确定分层数量。最后分析了材料参数的分散性对径向感知模型反演精度的影响。研究表明,本文提出的暂态温度径向感知模型具有较高的反演精度,可应用于各种工况下缆芯温度的实时监测。In order to realize the real-time inversion of cable core transient temperature based on cable surface temperature measurement,this paper first analyzes the characteristics of diffusion path of radial heat flux in the cable,establishes the equivalent model of thermal resistance and thermal capacity concentration parameters at each layer of the cable structure,and analyzes the factors influencing the error of the equivalent model of thermal circuits.Then the finite element simulation calculation of transient temperature field inside 110 kV single core cable body is carried out,the necessity of the layered modeling of cross-linked polyethylene insulation is analyzed,and the number of layering is given.Finally,the influence of the dispersion of material parameters on the inversion accuracy of the radial sensing model is analyzed.This research shows that the proposed radial sensing model has high inversion accuracy and can be applied to the real-time monitoring of the cable core temperature under various operating conditions.

关 键 词：电力电缆 温度场 径向感知模型 热路等效模型 

分 类 号：TM726[电气工程—电力系统及自动化]