Abstract:In view of the low accuracy of the traditional fault location method of high frequency and high voltage excitation cable,a fault location detection method of high frequency and high voltage excitation cable based on delay circuit is proposed.Firstly,combining with the operation stability monitoring method under the condition of weak current network,the power characteristic analysis and parameter identification of cable fault location are carried out,and then the high-resolution spectrum feature extraction of excitation cable fault is carried out by using the voltage output stability test method.On this basis,according to the output voltage and load difference,the delay circuit control and load balancing scheduling are carried out,and the Bayesian network model of fault feature distribution is constructed.Finally,the fault location parameters are estimated,the convergence of current fault output is judged,and the high-frequency is realized according to the load difference feature.The simulation results show that the accuracy of fault detection is high,the ability of self-adaptive location detection is improved,and the ranging results are evenly distributed.