METHOD OF CALCULATING SURGE PROPAGATION SPEED AND SYSTEM FOR LOCATING FAULT POINTS BY THE USE THEREOF

摘要

An object of the present invention is to provide a means for accurately locating fault points by calculating the surge propagation speed at the time of surge identification. The present invention includes a method of calculating surge propagation speed in a fault point location system comprising: substations [1] installed along transmission and distribution lines for sending surge detection time information along the transmission and distribution lines to a master station [2]; and the master station [2] for locating a fault point on the basis of the surge detection time information; characterized in that the surge propagation speed is obtained on the basis of detection times of a surge voltage or a surge current at the first substation positioned adjacent to a fault point along the transmission and distribution line and another substation positioned next to the first substation together with a length of the transmission and distribution line between the first and other substations. Based on the distance between substations [1A and 1B] and the difference of surge propagation time, the surge propagation speed v AB can be computed. Therefore, the surge propagation speed v AB that is obtained can be used as the surge propagation speed v which will be used for identifying the location of the fault point [P]. Moreover, such surge propagation speed is used to identify the location of a fault point, therefore enabling an accurate fault point location under varying conditions such as of transmission and distribution line or weather.