High-precision time domain reactive power measurement in the presence of interharmonics
When interharmonics exist in power system signals, large errors emerge in traditional time domain reactive power measurement. In this paper, we present a novel time domain integral method with good effect of restraining interharmonics, synchronization error, and white noise, as well as the principle...
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| Veröffentlicht in: | Frontiers of information technology & electronic engineering 2011-04, Vol.12 (4), p.330-337 |
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| creator | Zhang, Bei Wei, Guo Sun, Jin-wei |
| description | When interharmonics exist in power system signals, large errors emerge in traditional time domain reactive power measurement. In this paper, we present a novel time domain integral method with good effect of restraining interharmonics, synchronization error, and white noise, as well as the principle of the selection of the sampling periods when employing this approach. The current signal and phase-shifted voltage signal are reconstructed after the harmonic components of signals are extracted, so that the interharmonics are filtered. The influence of the synchronization error on the measurement is reduced through removing the weight coefficients of the reactive components. In the simulation, we apply several cosine windows to the proposed method and analyze signals containing both harmonics and interharmonics. The results show that, in the presence of interharmonics, synchronization error, and white noise （with a fundamental signal-to-noise ratio of 40 dB） all together, the relative errors are within the magnitude of 10^-4, which perfectly satisfies the practical requirement. |
| doi_str_mv | 10.1631/jzus.C1000145 |
| format | Article |
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In this paper, we present a novel time domain integral method with good effect of restraining interharmonics, synchronization error, and white noise, as well as the principle of the selection of the sampling periods when employing this approach. The current signal and phase-shifted voltage signal are reconstructed after the harmonic components of signals are extracted, so that the interharmonics are filtered. The influence of the synchronization error on the measurement is reduced through removing the weight coefficients of the reactive components. In the simulation, we apply several cosine windows to the proposed method and analyze signals containing both harmonics and interharmonics. The results show that, in the presence of interharmonics, synchronization error, and white noise （with a fundamental signal-to-noise ratio of 40 dB） all together, the relative errors are within the magnitude of 10^-4, which perfectly satisfies the practical requirement.</description><identifier>ISSN: 1869-1951</identifier><identifier>ISSN: 2095-9184</identifier><identifier>EISSN: 1869-196X</identifier><identifier>EISSN: 2095-9230</identifier><identifier>DOI: 10.1631/jzus.C1000145</identifier><language>eng</language><publisher>Heidelberg: SP Zhejiang University Press</publisher><subject>Communications Engineering ; Computer Hardware ; Computer Science ; Computer Systems Organization and Communication Networks ; Electrical Engineering ; Electronics and Microelectronics ; Error analysis ; Errors ; Harmonics ; Instrumentation ; Interharmonics ; Networks ; Noise levels ; Power measurement ; Reactive power ; Signal to noise ratio ; Synchronism ; Synchronization ; Time domain ; Time domain analysis ; White noise</subject><ispartof>Frontiers of information technology & electronic engineering, 2011-04, Vol.12 (4), p.330-337</ispartof><rights>Journal of Zhejiang University Science Editorial Office and Springer-Verlag Berlin Heidelberg 2011</rights><rights>Journal of Zhejiang University Science Editorial Office and Springer-Verlag Berlin Heidelberg 2011.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c320t-114fc0e56efc341a07539c48ef8cd01ea6f9f7cae79620c608a07fa00673fd863</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/89589X/89589X.jpg</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1631/jzus.C1000145$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2918722765?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,780,784,21388,27924,27925,33744,41488,42557,43805,51319,64385,64389,72469</link.rule.ids></links><search><creatorcontrib>Zhang, Bei</creatorcontrib><creatorcontrib>Wei, Guo</creatorcontrib><creatorcontrib>Sun, Jin-wei</creatorcontrib><title>High-precision time domain reactive power measurement in the presence of interharmonics</title><title>Frontiers of information technology & electronic engineering</title><addtitle>J. Zhejiang Univ. - Sci. C</addtitle><addtitle>Journal of zhejiang university science</addtitle><description>When interharmonics exist in power system signals, large errors emerge in traditional time domain reactive power measurement. In this paper, we present a novel time domain integral method with good effect of restraining interharmonics, synchronization error, and white noise, as well as the principle of the selection of the sampling periods when employing this approach. The current signal and phase-shifted voltage signal are reconstructed after the harmonic components of signals are extracted, so that the interharmonics are filtered. The influence of the synchronization error on the measurement is reduced through removing the weight coefficients of the reactive components. In the simulation, we apply several cosine windows to the proposed method and analyze signals containing both harmonics and interharmonics. 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| subjects | Communications Engineering Computer Hardware Computer Science Computer Systems Organization and Communication Networks Electrical Engineering Electronics and Microelectronics Error analysis Errors Harmonics Instrumentation Interharmonics Networks Noise levels Power measurement Reactive power Signal to noise ratio Synchronism Synchronization Time domain Time domain analysis White noise |
| title | High-precision time domain reactive power measurement in the presence of interharmonics |
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