交联聚乙烯电缆绝缘老化超低频介损试验及评价规程研究  

Study on ultra-low frequency dielectric loss test and evaluation regulation of cross-linked polyethylene cable insulation aging

作　　者：赵丽惠 姜幸 钱伟 张勇 王风华[2] ZHAO Lihui;JIANG Xing;QIAN Wei;ZHANG Yong;WANG Fenghua(Qujing Qilin Power Supply Bureau,Yunnan Power Grid Co.,Ltd,Qujing,Yunnan 655000;State Grid Electric Power Research Institute Wuhan Nanrui Co.,Ltd,Wuhan 430070)

机构地区：[1]云南电网有限责任公司曲靖麒麟供电局,云南曲靖655000 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430070

出　　处：《电气技术》2021年第11期63-68,共6页Electrical Engineering

摘　　要：本文基于通过检测电缆超低频介损值确定电缆老化程度的基本原理,结合某地实测得到的多组数据,通过国际规程IEEE 400.2—2013进行初步判断,分析处于不同状态下的电缆介损值的变化规律及其原因,并得出该规程仅适用于没有局部劣化的电缆。此外,由于我国电缆制造材料、结构和生产工艺与国外产品存在差异,采用国际规程判断电缆老化程度有时会变得不准确。为解决此类问题,本文建立更加全面的判据体系,给出最优判断阈值的确定方法,并对该地区实测得到的数据进行拟合,得到更加准确的分级判断阈值。此方法可为建立符合我国电缆实际情况的评价规程提供参考。In this paper,based on the basic principle of determining the aging degree of the cable by detecting the ultra-low frequency dielectric loss value of the cable,combined with the multiple sets of data measured in a certain area,this paper makes a preliminary judgment through the international regulation IEEE 400.2—2013,analyzes the variation law of the cable dielectric loss value under different conditions and its causes,and concludes that the regulation is only applicable to cables without local deterioration.In addition,due to the differences between China’s cable manufacturing materials,structures and production processes and foreign products,it sometimes becomes inaccurate to judge the degree of cable aging by international regulations.In order to solve such problems,this paper establishes a more comprehensive criterion system and the establishment method of the optimal judgment threshold,and fits the measured data in the region as an example to obtain a more accurate grading judgment threshold.This method has certain reference significance for the establishment of evaluation rules in line with China’s cable reality.

关 键 词：电缆老化程度检测 介质损耗 超低频高压 绝缘判据 数据拟合 

分 类 号：TM247[一般工业技术—材料科学与工程]