| 摘要 |
<p>A fault locator includes fault point determining means for receiving a voltage and current of at least one point of a transmission line and calculating a distance XL from a specified point on the transmission line to a fault point which is at least one of short-circuiting and grounding faults occurring on the transmission line according to the relation between a fault phase voltage V in a fault section of the transmission line and the product SIGMA IZ of a current I and an impedance Z expressing a voltage drop with respect to the fault phase voltage V, and the fault locator further includes first means for calculating the value of a voltage VF of the fault point, second means for calculating a value of the product SIGMA IZ of a preset current I flowing in the fault section of the transmission line and the impedance Z, and third means for calculating a value QVF PROPORTIONAL VF/ SIGMA IZ which varies in proportion to the quotient of the value obtained by the first means divided by the value obtained by the second means as a fault point voltage hypothesis error QVF. <IMAGE></p> |
