systems makes early fault detection and rapid equipment isolation imperative to maintain system stability. Faults on power system transmission lines need to be detected and located rapidly, classified correctly and cleared as fast as possible. Fault detector module of a transmission line protective scheme can be used to start other relaying ...
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Hilbert Huang transform is used for processing of the six phase fault current signals which are recorded by the transducers located at bus-1 of the six phase transmission line. The possibility of the HHT-based fault detection technique is tested under the variation of fault type, fault location, fault inception time, fault and ground resistances.
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Unsymmetrical faults. The line to ground fault (L-G) is the most common fault and 65-70 percent of faults are of this type. It causes the conductor to make contact with the earth or ground. 15 to 20 percent of faults are double line to ground and causes the two conductors to make contact with the ground.
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Detection and Classification of Fault in the Transmission line using Wavelet Transform
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lines, representing SCs&MOVs and a fault is utilized, • two characteristic fault spots (Figures 1, 2) are consid-ered and thus two subroutines are used in the algorithms: Subroutine 1 (Fig. 1) for locating faults behind the SCs&MOVs with additional discrimination of the faults overreaching the line length (denoted in Fig. 1 as F1a);
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Detection and Classification of Fault in the Transmission line using Wavelet Transform