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Vision Power Range
Vision Network Analysis
Vision Grid Navigator
Vision LV Network Design
Vision Cable Analysis
Vision Power Quality
Vision Fault Finder
• Application
• Overview

Charles-Augustin de Coulomb

French physicist best known for the formulation of Coulomb’s law, which states that the force between two electrical charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. Coulombic force is one of the principal forces involved in atomic reactions.

vision boxVision Fault Finder

Vision Fault Finder is an application that identifies the fault location using the measured voltages and currents wave forms of a fault. The application can pin point two and three phase faults within 100 meters. Single phase faults in earthed networks can be located with an accuracy of 500 meters.

 

 

kabeleditor

“Artist impression” in Vision Grid Navigator
of a fault in MV cable network

Introduction
Most of the outage time for power systems is caused by faults in the MV network. The usual way of manually finding the fault location by checking short circuit indicators is time consuming. Utilities want to improve the network performance and one of their goals is to decrease the time to locate the faults.
Together with grid operator Alliander Phase to Phase developed a fault location system.

Fault analysis
The developed fault location system uses the sinusoidal measurement of currents and voltages during the fault that is provided by the substation digital protection system. Then the measured signals are processed.
In the second stage short circuit calculations are performed on a model of the network. The results of these calculations are compared with the results of the first stage, in order to find a location giving the same fault impedance.

Download the fault finder paper for the Cired 2009 verder