INSULATED MONITORING METHOD FOR DC SYSTEM AND DEVICE THEREOF

摘要

The embodiments of the present invention relate to the field of power systems, and particularly to an insulated monitoring method for a DC system and a device thereof, for solving the problem that the branch tour-inspection process during the monitoring of the DC system existing in the prior art is time-consuming considerably and thus a failed branch cannot be detected in a timely manner. The insulated monitoring method for a DC system in the embodiments of the present invention includes: when it is determined that a bus has failed, determining a pole to be detected of a branch connected to the failed bus, wherein the insulation resistance value of the bus connected to the pole to be detected of the branch is not greater than a first threshold; and detecting the pole to be detected of the branch. When a bus has failed, the embodiments of the present invention avoid the need of the tour-inspection of the positive pole and negative pole of each branch each time the bus has failed by determining a pole to be detected of a branch connected to the failed bus and detecting the pole to be detected of the branch so as to determine a failed branch, thus greatly shortening the time for detecting a failed branch.