Determinant-based feature extraction for fault detection and classification for power transmission lines

An adaptive fault line selection method based on atomic comprehensive measure values for distribution network

“…The simulation time is 0.06 s, and the fault occurs in 0.02 s, the decomposition results are shown in Figure 9. From Figure 9, when a fault occurs, a large amount of fault information is contained, after wavelet decomposing, the feature frequency bands [4,0], [4,1], [4,2], and [4,3] are obtained. Finally, it is known that the original signal can be decomposed as the low-frequency and the high-frequency signals, after SVD, the wavelet singular entropy can be obtained; the maximum reciprocal of singular entropy is selected as the fault line.…”

“…Data have shown that most faults occur in a distribution network in the single‐phase to ground fault. When a single‐phase to ground fault occurs, the line voltage value is still symmetrical whereas the fault current gets weak, it is difficult to propose a reliable fault line selection method; therefore, it is necessary and significant to study in this area …”

“…When a single-phase to ground fault occurs, the line voltage value is still symmetrical whereas the fault current gets weak, it is difficult to propose a reliable fault line selection method; therefore, it is necessary and significant to study in this area. 1,2 Generally speaking, the existing fault line detection methods can be divided into 3 major classes: steady state information theories, artificial injecting information theories, and transient information theories. The selection methods of steady state information 3,4 were mainly based on amplitude comparison, phase comparison, zero-sequence power, and others, whereas because of the inequalities of transient zerosequence current (TZSC) from current transform, outside interference factors and small amplitudes can lead to the low accuracy of selection results.…”

Design and performance evaluation through synchro-phasor signals for transient fault analysis in transmission lines and distributions

“…The behavior of protective devices may change with the various types of loads such as linear and non-linear loads connected with the distribution system [23]. The transmission line protection schemes are divided into three stages: (i) fault detection and classification, (ii) fault zone estimation or fault location and (iii) decision logic and subsidiary modules [24]. Therefore, the detection of faults is an essential part of the protection scheme.…”

The Impact of Conduction Angle on Short Circuit Calculations in Case of Three Phase Fault for a FACTS Controlled Transmission Line in the Algerian Network

“…That method utilized the measured impedance by distance relay and super imposed current factor, which is the ratio of post-fault current to super impose current, to discriminate the fault position on the line. Reference [6] proposes a novel fault feature extraction that could be used in fault detection and classification schemes based on single-end measurements using time shift invariant property of a sinusoidal waveform. In [7], the impact of fault resistance, for a transmission line compensated by series FACTS devices, has been investigated in the case of phase to earth fault.…”