Fault Perception and Aging Location of Distribution Network Cables Based on Leakage Current
As an important carrier for energy transmission in power distribution system,safe and reliable operation of ca-bles is the basis for ensuring power supply reliability of distribution networks.In view of the limitations of current cable monitoring methods and the low accuracy of fault location,a high-precision state perception monitoring method for insula-tion state of distribution network cables based on common-mode leakage current signals is proposed.First the common-mode leakage current is used to characterize the characteristic parameters of cable insulation aging.On this basis,the mo-nitoring method based on common-mode signal injection and the high-precision location of local cable aging are studied.Fi-nally effectiveness and feasibility of the proposed scheme and method are proved by simulative analysis.