Fault Location for Coaxial Cables Based on Broadband Impedance Spectroscopy

Fast and accurate location of cable fault is the key to ensure the safe and stable operation of the cable line and improve the reliability of the power supply. The broadband impedance spectroscopy (BIS) has provided a new method for cable fault location. Based on the relative research, this paper presents a method for cable fault location on the basis of the impedance spectroscopy. An integral transform (IT) algorithm is developed to transform the frequency-dependent impedance spectroscopy to a spatial domain function, and a location function is also promoted to achieve the fault location. The validity of the method is also verified by experiments performed on 10kV XLPE cables. The results show that the method proposed in this paper can be used to locate the cable fault, and the directions for future research is also presented.