High impedance fault detection on distribution systems

High impedance fault protection in transmission lines using a WPT-based algorithm

“…Therefore, the new algorithm is insensitive to the normal changes in the power flow of the line. -The algorithm has capability of detecting faulted phase, which supports the single pole tripping and auto-reclosing facility, while, most of previous methods [1][2][3][4][5][6][7][8] are not able to detect the faulted phase. -Due to the simplicity of proposed method, which is just based on WPT, without aid by any other technique such as ANN, fuzzy and intelligent systems, the fault detection part of algorithm is fast.…”

“…In [1][2][3][4][5], the presented algorithms are based on Discrete Wavelet Transform (DWT). A method is introduced in [6], which uses extra mechanical and electrical devices for HIF detection, thus, it is not proper economically. In [7], an HIF detection method with an appropriate arc model for extra high voltage (EHV) lines has been presented.…”

Detection of High Impedance Faults using wavelet transform

“…Originally, the detection was simple. Mechanical protection was introduced by forcing contact with a solid ground in order to enable conventional overcurrent protection to operate [6].…”

“…The detection criterion (6) make sure the detection e value 10 is used as a lues are calculated for all t HIF features are more espond to frequency range fore, the detection criteria red.…”

High Impedance Fault Detection Based on Wavelet Transform and Statistical Pattern Recognition

“…Generally, detection techniques are divided in mechanical [2], and electrical detection methods. In mechanical methods, some devices are used to provide low impedance by catching the fallen conductor.…”