| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for determining a location of a fault in a faulty feeder section of an ungrounded power distribution system on the basis of a type of the fault and the type of the faulty line.SOLUTION: The method determines, if the faulty line is the lateral and the fault is phase-to-phase or double-phase-to-ground fault, the fault at a first point on an un-faulty phase of the lateral where a fault current equals a load current. The method determines, if the faulty line is the lateral and the fault is the three-phase fault, the location of the fault at a point with a minimal difference between imaginary parts of equivalent fault impedances. The method determines, if the faulty line is the mainline, the location of the fault at a point partitioning the faulty segment on two sub-segments with a ratio of lengths determined based on the voltages at the buses of the faulty segment. |
