METHOD FOR ELIMINATING DEAD AREA OF SINGLE-TERMINAL TRAVELING WAVE FAULT LOCATION OF HIGH-VOLTAGE POWER GRID IN COAL MINE

摘要

A method for eliminating a dead area of a single-terminal traveling wave fault location of a high-voltage power grid in a coal mine, and relates to a method for single-terminal traveling wave fault location of the high-voltage power grid in the coal mine. An instant power (P) of a traveling wave is defined; a fault feature wave head is identified by using a method that special wave heads are mutually verified, thereby solving the problem of a location dead area; by comparing a calculation value of a known structure of a circuit topological parameter with a measurement value, a wave head reflected by a non-fault circuit is removed, and a reflection wave head of a bus at the opposite end of a fault circuit and a reflection wave head at a fault point, namely special wave heads, are searched for; by means of further classification-based calculations of the special wave heads, the function of eliminating the location dead area is implemented, and precise fault location is implemented; and the location error falls within 100 meters according to large quantities of simulation and on-site data tests.