基于频响函数曲率的高压电力电缆护套结构损伤定位  

Structural Damage Location of High Voltage Power Cable Sheath Based on FRF Curvatures

作　　者：杨世迎 陈晓儒 黄龙毅 于是乎 钟万里 张锋 钟森淼 钟红梅 邓小康 朱双 YANG Shiying;CHEN Xiaoru;HUANG Longyi;YU Shihu;ZHONG Wanli;ZHANG Feng;ZHONG Senmiao;ZHONG Hongmei;DENG Xiaokang;ZHU Shuang(Huizhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Huizhou Guangdong 516001,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广东电网有限责任公司惠州供电局,广东惠州516001 [2]广东电网有限责任公司电力科学研究院,广州510000

出　　处：《浙江电力》2021年第11期60-65,共6页Zhejiang Electric Power

基　　金：南方电网有限责任公司科技项目(031300KK52200003)。

摘　　要：为研究电力电缆护套结构性损伤时动力参数变化规律,建立了电力电缆护套结构振动损伤数学模型,对电力电缆护套结构振动损伤数学模型进行求解。利用锤击法对电力电缆护套进行结构振动试验,对电力电缆结构完好护套与电力电缆结构损伤护套进行了频率响应分析,依据振动试验数据判别电力电缆护套的结构性损伤。研究结果体现了电力电缆护套结构损伤特性,电力电缆护套结构产生损伤会出现动力参数的变化,完好电力电缆护套工况至电力电缆护套凹陷0.8 mm工况电力电缆护套频响函数曲率峰值范围为0.082~0.55。利用频响函数曲率可以对电力电缆护套损伤进行有效定位。In order to study the law of dynamic parameter change of power cable sheath in the case of structural damage,a mathematical model for vibration damage of the power cable sheath structure was established and solved.Frequency response analyses were performed on the intact sheath structure of the power cable and the damaged sheath structure of the power cable,and a structural vibration test was conducted on the power cable sheath using the hammer method.According to the vibration test data,the structural damage of the power cable sheath was discriminated.The research findings reflect the damage characteristics of the power cable sheath structure.The damage of the power cable sheath structure leads to the dynamic parameter change.The peak frequency response function(FRF)curvatures range between 0.082 and 0.55 in the case of the intact power cable sheath and power cable sheath depressed by 0.8 mm.The FRF curvatures can be used to locate the damage to the power cable sheath.

关 键 词：电缆护套 动力参数 频响函数曲率 损伤定位 

分 类 号：TM75[电气工程—电力系统及自动化]