METHOD OF CALCULATING SURGE PROPAGATION SPEED AND SYSTEM FORLOCATING 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.