Neutral line anomaly judgment method based on non-fault phase second harmonic component proportion

Neutral line anomaly judgment method based on non-fault phase second harmonic component proportion

The invention relates to a neutral line anomaly judgment method based on a non-fault phase second harmonic component proportion. The method comprises the following steps: identifying a non-fault phase in each phase line, and obtaining a second harmonic component proportion in a secondary current of...

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Hauptverfasser: WEN CAIQUAN, YAN MAOHUA
Format: Patent
Sprache:chi ; eng
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MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator WEN CAIQUAN
YAN MAOHUA
description The invention relates to a neutral line anomaly judgment method based on a non-fault phase second harmonic component proportion. The method comprises the following steps: identifying a non-fault phase in each phase line, and obtaining a second harmonic component proportion in a secondary current of the non-fault phase; when the proportion of the second harmonic component in the at least one non-fault-phase secondary current is greater than the first proportion value, acquiring a secondary zero-sequence electric signal; and according to the secondary zero-sequence electric signal, determining the abnormal type of the neutral line. The proportion of the secondary harmonic component of the secondary current corresponding to the non-fault phase of the three-phase power supply system is used as the judgment basis of the abnormality of the neutral line, a secondary zero-sequence electric signal is further obtained, and the abnormality type of the neutral line is analyzed based on the secondary zero-sequence electri
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The method comprises the following steps: identifying a non-fault phase in each phase line, and obtaining a second harmonic component proportion in a secondary current of the non-fault phase; when the proportion of the second harmonic component in the at least one non-fault-phase secondary current is greater than the first proportion value, acquiring a secondary zero-sequence electric signal; and according to the secondary zero-sequence electric signal, determining the abnormal type of the neutral line. The proportion of the secondary harmonic component of the secondary current corresponding to the non-fault phase of the three-phase power supply system is used as the judgment basis of the abnormality of the neutral line, a secondary zero-sequence electric signal is further obtained, and the abnormality type of the neutral line is analyzed based on the secondary zero-sequence electri</description><language>chi ; eng</language><subject>MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; PHYSICS ; TESTING</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20210813&amp;DB=EPODOC&amp;CC=CN&amp;NR=113253153A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20210813&amp;DB=EPODOC&amp;CC=CN&amp;NR=113253153A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WEN CAIQUAN</creatorcontrib><creatorcontrib>YAN MAOHUA</creatorcontrib><title>Neutral line anomaly judgment method based on non-fault phase second harmonic component proportion</title><description>The invention relates to a neutral line anomaly judgment method based on a non-fault phase second harmonic component proportion. 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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Neutral line anomaly judgment method based on non-fault phase second harmonic component proportion
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