Since most of the current power cables are laid underground,once the fault occurs,if the maintenance personnel cannot find it in time,it will affect the normal power supply.Therefore,it is necessary to locate the fault in advance and remind the maintenance personnel.This paper proposes a cable fault location method based on the improved spread spectrum time-domain reflectometry(SSTDR).This paper introduces the principle of fault location,location principle,PN code selection and fault location algorithm analysis of SSTDR online detection cable.A method of using Logistic chaotic sequence as the incident signal to locate the cable fault is proposed.The circuit model is modulated based on MATLAB/Simulink plantform,which the simulative analysis is carried out.According to the generated binary Logistic chaotic sequence and cable open circuit fault waveforms,this paper verifies the proposed method has the practical application value.
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