Method and device for preventing acceleration protection misoperation after distance
The invention discloses a method and device for preventing acceleration protection misoperation after distance, and belongs to the technical field of power system relay protection. The method comprises the following steps: analyzing a current fundamental wave amplitude, a current second harmonic amp...
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| creator | YU WEIGUO ZHOU XIANG QIU ZHIGENG GAO XIAOQUAN LU FENG ZHANG GUANGJIA LIN SAJIA NING TAO ZOU QINGRUI |
| description | The invention discloses a method and device for preventing acceleration protection misoperation after distance, and belongs to the technical field of power system relay protection. The method comprises the following steps: analyzing a current fundamental wave amplitude, a current second harmonic amplitude and a voltage amplitude of each phase circuit of a power line; calculating an impedance value of the power line by using the current fundamental wave amplitude and the voltage amplitude, and comparing the impedance value with a preset impedance threshold value; when the impedance value is smaller than a preset impedance threshold value, the second harmonic amplitude of the current is continuously monitored within a first preset duration, and whether harmonic locking operation is started or not is judged according to a preset criterion; and when the harmonic locking operation is not started within the first preset duration, determining that the power line has a fault, and accelerating the protection action af |
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The method comprises the following steps: analyzing a current fundamental wave amplitude, a current second harmonic amplitude and a voltage amplitude of each phase circuit of a power line; calculating an impedance value of the power line by using the current fundamental wave amplitude and the voltage amplitude, and comparing the impedance value with a preset impedance threshold value; when the impedance value is smaller than a preset impedance threshold value, the second harmonic amplitude of the current is continuously monitored within a first preset duration, and whether harmonic locking operation is started or not is judged according to a preset criterion; and when the harmonic locking operation is not started within the first preset duration, determining that the power line has a fault, and accelerating the protection action af</description><language>chi ; eng</language><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION ; MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; PHYSICS ; TESTING</subject><creationdate>2024</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&date=20241015&DB=EPODOC&CC=CN&NR=118783371A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20241015&DB=EPODOC&CC=CN&NR=118783371A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YU WEIGUO</creatorcontrib><creatorcontrib>ZHOU XIANG</creatorcontrib><creatorcontrib>QIU ZHIGENG</creatorcontrib><creatorcontrib>GAO XIAOQUAN</creatorcontrib><creatorcontrib>LU FENG</creatorcontrib><creatorcontrib>ZHANG GUANGJIA</creatorcontrib><creatorcontrib>LIN SAJIA</creatorcontrib><creatorcontrib>NING TAO</creatorcontrib><creatorcontrib>ZOU QINGRUI</creatorcontrib><title>Method and device for preventing acceleration protection misoperation after distance</title><description>The invention discloses a method and device for preventing acceleration protection misoperation after distance, and belongs to the technical field of power system relay protection. 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| subjects | CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING |
| title | Method and device for preventing acceleration protection misoperation after distance |
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