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Turn to turn faults usually cause smaller changes in the phase currents of a shunt reactor when fewer turns are involved. Designing a sensitive and reliable algorithm for turn to turn fault detection in shunt reactors still remains a challenge. In this paper, a novel hybrid differential algorithm has been proposed to detect turn to turn faults in shunt reactors. The proposed algorithm calculates the...
Turn to turn faults usually cause smaller changes in the phase currents of a shunt reactor when fewer turns are involved. Designing a sensitive and reliable algorithm for turn to turn fault detection in shunt reactors still remains a challenge. In this paper, a novel hybrid differential algorithm has been proposed to detect turn to turn faults in shunt reactors. The proposed algorithm calculates the...
A new algorithm has been developed for phasor estimation of the current signal within numerical protective relays which effectively filters out harmonics, noise, and decaying dc offset. Analytical analysis is presented to show the effect of decaying dc on discrete Fourier transform (DFT)-based phasor estimation. Based on the presented theory, a new method is proposed to first estimate the decaying...
In series compensated transmission lines, current and voltage signals measured by the line protection system include considerable sub-synchronous frequency components (SSFCs) which are not sufficiently damped within a typical fault clearing time of line protection system. This does not allow accurate phasor estimation and thereby phasor-based fault location. This paper presents an accurate algorithm...
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