Fault Point Location Method, Based on Harmonics Analysis of a Distribution System
Péter Holcsik, Judith Pálfi, Zsolt Čonka, Kocsis István Bence
Abstract
To increase the reliability of energy distribution, it is necessary to shorten the downtime. It is very important to determine the location of a fault as accurately and as quickly, as possible. Than the maintenance service team can rectify the fault as soon as possible. Determining the distance of the fault (from the relevant power station) with the greatest possible accuracy, in the event of a short circuit on the external power line, is an important information that affects the time to find the actual location, thus eliminating the cause of the fault and the overall downtime. At present, we can most accurately determine the location of the fault using a wave locator -impedance principle. The main disadvantage of existing fault locators is that they are based on the assumption of ideally faults takes into account the consideration of symmetrical components of the line. These locators do not take into account the topology of the line, i.e. that the impedances of the individual phases, resp. fault loops are different. This paper proposes, an innovative method of symmetrical components or the Fourier thesis, by using modern informatics and communication tools, which provide opportunities to set new standard in finding the location of the fault on overhead lines in distribution network. Armed with a more precise determination of the failure location, we can reduce the time needed to eliminate the failures and thus, achieve improvements in the reliability of the power distribution system.