Abstract
This paper presents a method for detecting, classifying and localizing faults in MV distribution networks. This method is based on only two samples of current or voltage signals. The fault detection, faultclassification and fault localization are based on the maximum value of current and voltage as a function of time. A study is presented in this work to evaluate the proposed method.A comparative study between current and voltage method detection has been done to determine which is the fastest. In addition, the classication and localization of faults were made by the same method using two samples signal. Simulation with results have been obtained by using MATLAB / Simulink software. Results are reported and conclusions are drown. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Highlights
Electric power systems have developed rapidly in recent years and these systems have become important in all branches of the modern economy
Medium-Voltage electrical power distribution lines are an essential part of an electrical power grid that must ensure the continuity of power supply to Medium Voltage (MV) and Low Voltage (LV) consumers
When a fault occurs in a distribution networks, the fault current is always greater than the rated load current and the fault voltage will be smaller than the nominal network voltage
Summary
Electric power systems have developed rapidly in recent years and these systems have become important in all branches of the modern economy. That is not always the case, These lines experience faults which are caused by storms, lightning, snow, freezing rain, insulation breakdown and, short circuits caused by birds and other external objects [1] These faults must be detected, classied and localized quickly and correctly so that our system remains stable. Fault detection and localization conventional methods for distribution lines are broadly classied as impedance based method which uses the steady state fundamental components of voltage and current values [2]-[6]. Most methods use the maximum values of the voltage or current (Vmax, Imax) comparing them to a threshold value, in this paper we will use a new method based on two samples which is as follows: The equation of the voltage is as follows:.
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