Analysis of Degradation Degree of Power Cable Based on Current Harmonics

Due to the rapid development of the city, overhead lines are transformed year by year, whether it is the main network or the distribution network, the cable rate of each voltage level is getting higher and higher, and the health of the cable restricts the growing reliability of power supply, but most of the means to detect the deterioration of power cables are offline detection, and some tests are destructive tests, which are not conducive to the operation of power cables. Starting from current harmonic detection, this paper proposes a method for online detection of power cable deterioration based on current harmonics, so as to realize the online, multi-cycle and differentiated detection of power cables, assist operation and maintenance personnel to evaluate the health of cables, and improve power supply reliability.