Accident interval decision manner null of

摘要

PURPOSE:To carry out judgement with high reliability by confirming the operating state of main protective relay for every group of power interruption facility and judging the belonging facility to be faulty if any relay is operating then tracking the linkage of facility except the operation protective relay then judging the operation of a protective relay in a following faulty section to be valid and setting the following protective range as a candidate of fault. CONSTITUTION:If there is a tripped CB under a condition where power interrupted state exists at the opposite ends after occurrence of fault in a power system, the tripped CB is judged to be open. Then electrical linkage concerning the open/close state of other CBs is tracked and processing for forming a power interruption group is performed.