基于调频连续波技术的充电系统智能故障定位方法  

Intelligent Fault Location Method of Charging System Based on Frequency Modulation Continuous Wave Technology

作　　者：刘秀兰 程林 周文斌 赵宇彤 孟颖 关宇 LIU Xiulan;CHENG Lin;ZHOU Wenbin;ZHAO Yutong;MENG Ying;GUAN Yu(State Grid Beijing Electric Power Research Institute,Fengtai Beijing 100075,China)

机构地区：[1]国网北京市电力公司电力科学研究院,北京丰台100075

出　　处：《电子器件》2024年第2期436-441,共6页Chinese Journal of Electron Devices

基　　金：国网北京市电力公司,国网北京电科院2021年大功率充电设备检测能力提升项目(67022320003F)。

摘　　要：为了解决充电系统故障定位精度过低的问题,研究基于调频连续波技术的充电系统智能故障定位方法。利用小波变换方法选取高斯复小波作为母小波,提取充电系统充电暂态频率与放电暂态频率中的故障电流电压相量,作为充电系统故障特征。依据所提取的充电系统故障特征,采用行波测距技术判断充电系统故障区域。确定充电系统故障区域后,通过调频连续波技术,利用可调谐半导体激光器发射激光,通过充电系统故障区域返回的中频信号频率,精准定位充电系统故障点。实验结果表明,所提方法可以智能定位充电系统故障位置,充电系统故障智能定位误差均低于0.6%。In order to solve the problem that the fault location accuracy of the charging system is too low,an intelligent fault location method of the charging system based on the frequency modulation continuous wave technology is studied.The Gaussian complex wavelet is selected as the mother wavelet by using the wavelet transform method,and the fault current and voltage phasors in the charging transi⁃ent frequency and the discharging transient frequency of the charging system are extracted as the fault characteristics of the charging system.According to the extracted fault characteristics of the charging system,the traveling wave ranging technology is used to determine the fault area of the charging system.After determining the fault area of the charging system,the tunable semiconductor laser is used to emit laser light through frequency modulation continuous wave technology,and the frequency of the intermediate frequency signal re⁃turned by the fault area of the charging system is used to accurately locate the fault point of the charging system.The experimental re⁃sults show that the method can intelligently locate the fault location of the charging system,and the fault intelligent positioning error of the charging system is less than 0.6%.

关 键 词：调频连续波 充电系统 故障定位方法 小波变换方法 行波测距技术 中频信号 

分 类 号：TM933[电气工程—电力电子与电力传动]