南方电网技术2025，Vol.19Issue(2)：149-155,7.DOI:10.13648/j.cnki.issn1674-0629.2025.02.015
基于Pisarenko谐波分解的电力电缆缺陷定位方法
Power Cable Defect Location Method Based on Pisarenko Harmonic Decomposition
摘要
Abstract
In recent years,frequency domain reflection method(FDR)has been widely used in defect detection of power cables.However,multi-reflection of traveling waves and the reflection coefficient spectrum of FDR are non-periodic signals,which leads to false peaks in the positioning spectrum of FDR,and this problem can easily lead to serious misjudgment of the location of defects.In this paper,a new method for power cable defect location based on Pisarenko harmonic decomposition is proposed.The linear differ-ence model is used to fit the probability density distribution of reflection coefficient spectrum and construct an auto-regressive moving average(ARMA)model to replace the fast Fourier transform(FFT)in the traditional FDR.The proposed method can effectively overcome the influence of attenuation,multi-reflection and dispersion effect on cable defect location.Then,Pisarenko harmonic decomposition method is used to estimate all frequencies in the reflection coefficient spectrum and further complete the accuracy loca-tion of defects.Finally,the proposed method is validated through simulation data and on-site data from a 58 km submarine cable.The results show that the proposed method can not only weaken the influence of false peaks on defect location,but also improve the location resolution.关键词
反射系数谱/Pisarenko谐波分解/缺陷定位/频域反射法/电力线缆Key words
reflection coefficient spectrum/Pisarenko harmonic decomposition/defect location/frequency domain reflection/power cable分类
信息技术与安全科学引用本文复制引用
冯杰,王大兴,赵兴虹,周凯,唐志荣..基于Pisarenko谐波分解的电力电缆缺陷定位方法[J].南方电网技术,2025,19(2):149-155,7.基金项目
国家自然科学基金资助项目(52277156). Supported by the National Natural Science Foundation of China(52277156). （52277156）
