CN101776723A - Method for detecting earth fault of direct current system by utilizing frequency deviation method - Google Patents
Method for detecting earth fault of direct current system by utilizing frequency deviation method Download PDFInfo
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CN 200910200837 CN101776723B (en) | 2009-12-25 | 2009-12-25 | Method for detecting earth fault of direct current system by utilizing frequency deviation method |
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CN 200910200837 CN101776723B (en) | 2009-12-25 | 2009-12-25 | Method for detecting earth fault of direct current system by utilizing frequency deviation method |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
CN103250063A (en) * | 2010-10-14 | 2013-08-14 | Abb研究有限公司 | Fault direction parameter indicator device using only current and related methods |
CN103645418A (en) * | 2013-12-04 | 2014-03-19 | 国家电网公司 | Earth fault line selector for transformer station direct current system |
CN103675606A (en) * | 2013-12-07 | 2014-03-26 | 国家电网公司 | Bridge type direct-current fault monitoring alarm |
CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
CN106680649A (en) * | 2016-12-28 | 2017-05-17 | 岭东核电有限公司 | Nuclear power plant earth fault detecting method and device |
CN112269050A (en) * | 2020-10-16 | 2021-01-26 | 国网河北省电力有限公司雄安新区供电公司 | LC resonance fluxgate leakage current detection method for inhibiting modulation ripple |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2263925C2 (en) * | 2000-11-08 | 2005-11-10 | Дженерал Электрик Компани | Method and device for detecting short-circuit ground and calculating its resistance |
US7529069B1 (en) * | 2002-08-08 | 2009-05-05 | Weems Ii Warren A | Apparatus and method for ground fault detection and location in electrical systems |
JP3966251B2 (en) * | 2003-08-08 | 2007-08-29 | オムロン株式会社 | DC current detection circuit and DC ground fault current detection circuit |
CN2859554Y (en) * | 2005-05-11 | 2007-01-17 | 上海电力表计技术服务公司 | DC ground connection fault indicator |
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- 2009-12-25 CN CN 200910200837 patent/CN101776723B/en active Active
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103250063A (en) * | 2010-10-14 | 2013-08-14 | Abb研究有限公司 | Fault direction parameter indicator device using only current and related methods |
CN103250063B (en) * | 2010-10-14 | 2015-08-12 | Abb研究有限公司 | Only use failure of the current direction parameter device indicating and relevant method |
CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
CN103645418A (en) * | 2013-12-04 | 2014-03-19 | 国家电网公司 | Earth fault line selector for transformer station direct current system |
CN103675606A (en) * | 2013-12-07 | 2014-03-26 | 国家电网公司 | Bridge type direct-current fault monitoring alarm |
CN103675606B (en) * | 2013-12-07 | 2016-08-17 | 国家电网公司 | Bridge-type DC Line Fault monitoring alarm |
CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
CN104777368B (en) * | 2015-05-05 | 2016-03-02 | 成都电兴科技有限责任公司 | AC frequency conversion stake resistance on-line computing model and detection method |
CN106680649A (en) * | 2016-12-28 | 2017-05-17 | 岭东核电有限公司 | Nuclear power plant earth fault detecting method and device |
CN112269050A (en) * | 2020-10-16 | 2021-01-26 | 国网河北省电力有限公司雄安新区供电公司 | LC resonance fluxgate leakage current detection method for inhibiting modulation ripple |
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CN101776723B (en) | 2013-07-24 |
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