基于宽频阻抗谱的电力电缆缓冲层缺陷定位研究  

Research on Power Cable Buffer Layer Defect Localization Based on Broadband Impedance Spectroscopy

作　　者：任广振 曹俊平 邹星宇 穆海宝[3] 张浩天 黄勃 REN Guangzhen;CAO Junping;ZOU Xingyu;MU Haibao;ZHANG Haotian;HUANG Bo(State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China;College of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Wenzhou Power Supply Company,Zhejiang Wenzhou 325000,China)

机构地区：[1]国网浙江省电力有限公司,杭州310000 [2]国网浙江省电力有限公司电力科学研究院,杭州310014 [3]西安交通大学电气工程学院,西安710049 [4]国网浙江省电力有限公司温州供电公司,浙江温州325000

出　　处：《高压电器》2025年第2期111-119,共9页High Voltage Apparatus

基　　金：国网浙江省电力有限公司科技项目资助(5211DS20007P)。

摘　　要：电力电缆是电力系统传输电能的重要工具,然而其缓冲层可能会出现局部烧蚀缺陷,影响电能质量。为解决该问题,文中基于宽频阻抗谱技术提出了一种电力电缆缓冲层缺陷定位方法。该方法基于包络提取的思想改进阻抗谱傅里叶变换后的曲线、避免了畸变点的干扰,同时通过仿真模型初步验证了方法的有效性。为研究其实际应用能力,文中还进行了不同频带下的电力电缆缺陷实验,基于实验结果可以发现,随着频带的增加,缺陷定位的精度以及分辨率都有所改善。Power cable is an important tool to transmit electricity in power system,however,local ablation defects may occur in the cable buffer layer and affect the quality of electrical energy.In order to solve the problem,a kind of power cable buffer layer defect localization method based on broadband impedance spectroscopy technology is proposed in this paper.In the method,the localization curve obtained by the Fourier transform of the impedance spectroscopy is smoothed based on the envelope of the initial localization curve,which avoids the interference of distortion points.At the same time,effectiveness of the method is preliminarily verified by simulation model.In order to study its practical ability,experiments of power cable defect under different frequency bandwidth are performed.It is found through the experimental results that the accuracy and resolution become better with increase of frequency bandwidth.

关 键 词：电力电缆 缓冲层缺陷 定位 宽频阻抗谱 傅里叶变换 包络 

分 类 号：TM247[一般工业技术—材料科学与工程]