Fault location in a medium-voltage network

Details Fault location in a medium-voltage network Fault location in a medium-voltage network

G - Physics

01

R

G01R 31/08 (2006.01)

Patent

CA 2323066

A method and a device for location of a fault which has occurred on one of the lines in a medium-voltage network and where the lines may comprise a number of loaded branches with intermediate line sections. By means of central measurement of the common voltage and sum current of the lines prior to and after the occurrence of a fault, according to the invention, the positive-sequence impedance of the line and a fictitious value of the positive-sequence impedance of the line, as viewed from each-branch, may be determined. When the fictitious value of two consecutive branches changes from a positive to a negative value, this is interpreted as if the fault is located on the intermediate line section. The fictitious value permits a possibility of determining the distance on the line section from the branch with the latest positive value to the fault, whereby the total distance to the fault becomes equal to the sum of all the line sections up to the branch with the latest positive value plus the distance of the faulty line section.

L'invention concerne un procédé et un dispositif permettant de localiser une défaillance survenue sur une des lignes d'un réseau moyenne tension, les lignes pouvant être constituées d'un certain nombre de branches chargées et dotées de sections de lignes intermédiaires. Selon l'invention, on peut déterminer l'impédance séquentielle positive de la ligne et une valeur fictive de l'impédance séquentielle positive de la ligne, vu de chaque branche à l'appui de la mesure centrale de la tension commune aux lignes et du courant total avant et après apparition de la défaillance. Lorsque la valeur fictive de deux branches consécutives passe d'une valeur positive à une valeur négative, cela signifie que la défaillance se trouve sur la section de ligne intermédiaire. La valeur fictive permet de déterminer la distance de la section de ligne à partir de la branche ayant la dernière valeur positive jusqu'à la défaillance, la distance totale jusqu'à la défaillance étant égale à la somme de toutes les sections de lignes jusqu'à la branche ayant la dernière valeur positive plus la distance de la section de ligne défaillante.

Affiliated with

Also associated with

Rating

Fault location in a medium-voltage network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault location in a medium-voltage network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault location in a medium-voltage network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1629963