Sensitivity of voltage sag based fault location in distribution network to sub-cycle faults

Abstract

Single-phase-to-ground sub-cycle faults in the distribution network can be located using voltage sag fault location. This paper illustrates how a sensitivity study of measurement imperfections can be used to quantify the impact of sub-cycle faults on voltage sag based fault location. Our results suggest that there is a complex relationship between factors influencing error in fault location because the design of the study covered a wide range of conditions. The more complicated, higher order interactions have a stronger influence on error than any particular input factor alone.

Transmission line relay mis-operation detection based on time-synchronized field data

“…Different fault analysis methods have been proposed in the literature either as a separate fault detection, classification, and location functions or as a complete fault analysis tool [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. A group of methods are developed, considering line impedance calculation [8][9][10][11][12][13][14][15][16][17], while several others are based on high-frequency transients, traveling waves, and wavelet-based methods [18][19][20][21].…”

“…A group of methods are developed, considering line impedance calculation [8][9][10][11][12][13][14][15][16][17], while several others are based on high-frequency transients, traveling waves, and wavelet-based methods [18][19][20][21]. Regardless of different schemes presented in these works, the advantages of high-frequency based methods are the high accuracy and fast decision making.…”