Detection of the faulted network element usingfrequency spectrum features of zero-sequence currentunder transient earth faults in the network with neutralgrounding through Peterson-coil; Electrical, Electronics, Computer Engineering and their Applications (EECEA2016)

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Parent link:	Electrical, Electronics, Computer Engineering and their Applications (EECEA2016).— 2016.— [P. 93-97]
Tác giả chính:	Moldovanova E. A. Evgeniya Aleksandrovna
Nhiều tác giả của công ty:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт кибернетики (ИК) Кафедра вычислительной техники (ВТ), Национальный исследовательский Томский политехнический университет (ТПУ) Энергетический институт (ЭНИН) Кафедра электроэнергетических систем (ЭЭС)
Tác giả khác:	Weinstein (Vaynshteyn) R. A. Robert Aleksandrovich, Shestakova V. V. Vera Vasiljevna
Tóm tắt:	Title screen The paper analyzes the amplitude-frequency spectra of zero-sequence current in the network with neutral grounding through Peterson-coil under transient earth faults. As the assumed equivalent circuit contains elements with linear current-voltage characteristic, harmonic components of the spectrum are calculated separately for discharge current of the faulted phase, charge current of the unfaulted phases and excess charge drain current followed by the arc blowout. The resulting current spectra are calculated given that current on the faulted line at all stages of transient earth fault flow in the same direction. However, on the unfaulted line drain current flows in the opposite direction to discharge and charge current. We established that in the spectrum of zero-sequence current under transient earth faults the highest amplitude refers to harmonics at frequency near to the frequency of excess charge drain current which, in turn, is near to commercial frequency. With respect to this frequency, in amplitude-frequency spectra we can distinguish two significant areas. At frequency lower than commercial frequency, harmonic amplitudes on the faulted line exceed the harmonic amplitudes on the unfaulted line. At frequency higher than commercial frequency on the contrary: harmonic amplitudes on the unfaulted line exceed harmonic amplitudes on the faulted line. Therefore, as a sign of the faulted line we suggest using harmonic level at frequency lower than commercial frequency.
Ngôn ngữ:	Tiếng Anh
Được phát hành:	2016
Những chủ đề:	электронный ресурс труды учёных ТПУ замыкания замыкания на землю амплитудно-частотные спектры токи нулевая последовательность
Truy cập trực tuyến:	http://dx.doi.org/10.1109/EECEA.2016.7470772
Định dạng:	Điện tử Chương của sách
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=650091