Fast and accurate fault detection/location algorithms for double‐circuit/three‐terminal lines using phasor measurement units

Abstract

This paper presents new PMU-based fault detection/location algorithms for double-circuit/three-terminal transmission lines. The development of the algorithms is based on distributed transmission line models and synchronized positive sequence voltage and current phasors. The proposed fault detector is very sensitive, such that it can quickly identify faults. In particular, high impedance faults can be easily detected. A fault direction discriminator is also developed to distinguish between internal and external faults with respect to the protected zone. When an internal fault occurs, the discriminator starts the process of fault locating. The methods do not require fault type identification and their computational costs are very low since they do not require iterative operations. Moreover, the algorithms provide excellent performance for transposed and untransposed lines. The EMTP/ATP simulator was used to verify the performance of the methods. The simulation studies show that the algorithms can detect faults quickly, discriminate fault direction correctly, and provide a high degree of accuracy in fault location. The algorithms are independent of various fault and system conditions such as fault types, fault positions, fault path resistance, pre-fault load flows, mutual coupling effect of lines, and line shunt capacitance.

Application of solar cells and wireless system for detecting faults in phasor measurement units using non-linear optimization

“…Conversely, the only voltage measurement cannot give the accurate fault location (Das et al, 2017). Moreover, the PMU-based fault detection / location algorithms for double-circuit/three-terminal transmission line have been discussed in (Chen and Liu, 2003). Nevertheless, this method couldn't be detecting accurate fault region if fault impedance is less.…”

“…Conversely the major disadvantage of the Fourier transformation (Mohanta et al, 2015) is the inherent compromise that exists between frequency and time resolution. By considering the aforementioned issues (Sobrinho et al, 2018; Adewole et al, 2016; Pignati et al, 2017; Prasad and Vinod Kumar, 2018; Della Giustina et al, 2014; Pal et al, 2017; Wu et al, 2015; Saha Roy et al, 2017; Saber et al, 2018; Jiang et al, 2012; Das et al, 2017; Chen and Liu, 2003; Li et al, 2016; Wu et al, 2018; Barman and Roy, 2018; Appasani and Mohanta, 2018; Carvalho et al, 2018; Cui et al, 2019; Mohanta et al, 2015), a new-fangled technique is introduced in power system line fault finding and localisation method for power grids, to precisely recognize and assess the location of the fault taking place anywhere in the network using PMU measurements.…”

Fault location system for underground transmission line

“…That makes algorithm can eliminate the effects of fault impedance and shunt capacitance, and get the accurate estimation of fault distance. However, the disadvantages of double-ended synchronized fault location algorithm are complicated computation and synchronized measuring device which is not very popular in power system [3][4][5][6][7].…”

Using Delta Range for Fault Detection/Exclusion on GPS Positioning

“…and substitute u(k) into (5). Then, the linearized delta range measurement equation becomes (6). Then, the linearized Doppler shift measurement becomes…”

“…Chen and Liu [6] presented new fault detection/ location algorithms based on phasor measurement units for double-circuit/three-terminal transmission lines. The development of the algorithms is based on distributed transmission line models and synchronized positive sequence voltage and current phasors.…”