Transients detection and classification in distribution networks for high impedance faults identification

Abstract

Protection systems used in distribution networks are not able to detect short circuits with high contact resistance due to reduced currents generated, endangering the population and degrading the quality of the energy supplied. In this sense, this paper presents a new technique for detecting high impedance faults (HIF). The major advantage of this method is the not needing of additionally equipment installation in the distribution network, which reduces the cost of its implementation. Moreover, the proposed methodology is immune to any electrical transients generated in the system, such as capacitor bank switching, power transformers and inputs and output loads.

Transient inrush current detection and classification in 230 kV shunt capacitor bank switching under various transient‐mitigation methods based on discrete wavelet transform

“…Therefore, when designing a shunt capacitor-bank protection scheme, it is very important to clearly discriminate between the normal capacitor current and transient capacitor inrush current. Recently, many studies on transient classification and discrimination techniques have been reported [9][10][11][12][13][14][15]. These papers explain a new method for detecting and classifying the powerquality disturbance in both industries and utilities.…”