METHOD AND SYSTEM FOR A ANALYZING FAILURE OF POWER LINE USING PROTECTIVE RELAY

摘要

The present invention through the current transformer secondary fault occurs in the distribution lines in the pick-up time and the failure of the failure occurred delay time calculation unit for calculating a time interval of the operation start time of the protection relay according to the delay time ; Diagnosis fault current computing section for computing a fault diagnosis based on the current by using the lever value and the delay time of the protection relay by calculating the pick-up drain , and the pick-up drain , the tap values and the current ratio of the protection relay ; And broken point determining unit for determining the point of failure by comparing the plurality of the estimated current value of the fault current and the current value of the diagnosis fault current ; characterized in that it comprises a