2007 IEEE Lausanne Power Tech 2007
DOI: 10.1109/pct.2007.4538578
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Measurement of Subharmonics in Power Voltages

Abstract: This paper presents the results of the monitoring of subharmonic voltages in a low-voltage distribution network using an IEC harmonic measurement instrument. The time evolution and the statistical analysis of the r.m.s. voltage magnitude of the subharmonic group and subgroup, defined as grouping of the output bins of an IEC harmonic measurement instrument below 50 Hz, are investigated in a low-voltage distribution system. The results obtained show higher magnitude of these components than was expected, showing… Show more

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Cited by 26 publications
(28 citation statements)
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“…Thereafter the current spectrum of Bus 1 and Bus 2 was analyzed using Continuous Wavelet Transform to check whether any sub-harmonic content is present or not. [2,4] Transform analysis of the current spectrum of phase A, B, C of Bus 1 under single phasing of phase A and line to ground fault condition It is very clear from the fig. 3 that sub-harmonics of 0.1Hz is clearly visible in the output spectrum whose amplitude is 0.4 occurring at a time instant between 1400-1510 seconds.…”
Section: Case Studymentioning
confidence: 93%
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“…Thereafter the current spectrum of Bus 1 and Bus 2 was analyzed using Continuous Wavelet Transform to check whether any sub-harmonic content is present or not. [2,4] Transform analysis of the current spectrum of phase A, B, C of Bus 1 under single phasing of phase A and line to ground fault condition It is very clear from the fig. 3 that sub-harmonics of 0.1Hz is clearly visible in the output spectrum whose amplitude is 0.4 occurring at a time instant between 1400-1510 seconds.…”
Section: Case Studymentioning
confidence: 93%
“…In addition to it overvoltage and under voltages are also visible in the output frame. Current spectrum is seen to have some harmonics in the output frame but fractional harmonics is assumed to be not appearing in the output frame which will be clear after CWT [2,4] analysis of phase current. Also the use of series compensators and MOV clears the fault after a certain interval of time and renders reliable behavior of the developed power system with zero fault current under running condition.…”
Section: Case Studymentioning
confidence: 99%
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“…This approach has a limit: the problem must be a priori known in order to promptly act, but, unluckily, this condition is not common in an electrical network [14]. Today, the great calculus capability of the digital systems allows for the development of instruments that are able to limit the effects of the deviations [17]. To evaluate the PQ [18], it is necessary to make measurements.…”
Section: The First Version Of the Instrumentmentioning
confidence: 99%
“…Today, the great calculus capability of the digital systems allows for the development of instruments that are able to limit the effects of the deviations [17]. To evaluate the PQ [18], it is necessary to make measurements.…”
Section: Introductionmentioning
confidence: 99%