Method for preventing over-current protection misoperation of commutation reactance
The invention relates to a method for preventing overcurrent protection misoperation of a commutation reactor, which comprises the following steps of: 1, carrying out half-cycle absolute value integration on sampling data of a current transformer arranged on the commutation reactor; obtaining a half...
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| creator | ZHANG YANXIA DONG GUANGHAO |
| description | The invention relates to a method for preventing overcurrent protection misoperation of a commutation reactor, which comprises the following steps of: 1, carrying out half-cycle absolute value integration on sampling data of a current transformer arranged on the commutation reactor; obtaining a half-cycle integral value S < full > (t1) calculated by taking the fault occurrence moment as a starting point and a half-cycle integral value S < full > (t2) calculated by taking the fault occurrence moment as a starting point after a period of time; and step 2, calculating S < full > (t2)-S < full > (t1), when S < full > (t2)-S < full > (t1) is greater than S < set > and continuously satisfies 3ms, locking over-current protection of the commutation reactor, and setting a setting value Sset according to 10% of a half-cycle integral value of a fundamental wave current when normal operation is avoided.
本发明涉及一种防止换相电抗过电流保护误动作的方法，包括下列步骤：步骤1：对换相电抗上安装的电流互感器采样数据进行半周绝对值积分，得到以故障发生时刻为起点计算的半周积分值S全(t1)和以故障发生一段时间后为起点计算的半周积分值S全(t2)； |
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本发明涉及一种防止换相电抗过电流保护误动作的方法，包括下列步骤：步骤1：对换相电抗上安装的电流互感器采样数据进行半周绝对值积分，得到以故障发生时刻为起点计算的半周积分值S全(t1)和以故障发生一段时间后为起点计算的半周积分值S全(t2)；]]></description><language>chi ; eng</language><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION</subject><creationdate>2023</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=20230704&DB=EPODOC&CC=CN&NR=116388119A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20230704&DB=EPODOC&CC=CN&NR=116388119A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ZHANG YANXIA</creatorcontrib><creatorcontrib>DONG GUANGHAO</creatorcontrib><title>Method for preventing over-current protection misoperation of commutation reactance</title><description><![CDATA[The invention relates to a method for preventing overcurrent protection misoperation of a commutation reactor, which comprises the following steps of: 1, carrying out half-cycle absolute value integration on sampling data of a current transformer arranged on the commutation reactor; obtaining a half-cycle integral value S < full > (t1) calculated by taking the fault occurrence moment as a starting point and a half-cycle integral value S < full > (t2) calculated by taking the fault occurrence moment as a starting point after a period of time; and step 2, calculating S < full > (t2)-S < full > (t1), when S < full > (t2)-S < full > (t1) is greater than S < set > and continuously satisfies 3ms, locking over-current protection of the commutation reactor, and setting a setting value Sset according to 10% of a half-cycle integral value of a fundamental wave current when normal operation is avoided.
本发明涉及一种防止换相电抗过电流保护误动作的方法，包括下列步骤：步骤1：对换相电抗上安装的电流互感器采样数据进行半周绝对值积分，得到以故障发生时刻为起点计算的半周积分值S全(t1)和以故障发生一段时间后为起点计算的半周积分值S全(t2)；]]></description><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNykEKwjAQheFsXIh6h3iALkJB6lKK4kY3ui9hfNFCkwmTac9vUQ_g6vE9_qW5XaAvftjAYrNgQtI-PS1PkIpGkdnzzwrSnpONfeEM8R9wsMQxjvqlwJP6RFibRfBDwea3K7M9He_tuULmDiV7QoJ27dW5Xd00zu0P9T_NG-zlOag</recordid><startdate>20230704</startdate><enddate>20230704</enddate><creator>ZHANG YANXIA</creator><creator>DONG GUANGHAO</creator><scope>EVB</scope></search><sort><creationdate>20230704</creationdate><title>Method for preventing over-current protection misoperation of commutation reactance</title><author>ZHANG YANXIA ; DONG GUANGHAO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN116388119A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2023</creationdate><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>ZHANG YANXIA</creatorcontrib><creatorcontrib>DONG GUANGHAO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ZHANG YANXIA</au><au>DONG GUANGHAO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for preventing over-current protection misoperation of commutation reactance</title><date>2023-07-04</date><risdate>2023</risdate><abstract><![CDATA[The invention relates to a method for preventing overcurrent protection misoperation of a commutation reactor, which comprises the following steps of: 1, carrying out half-cycle absolute value integration on sampling data of a current transformer arranged on the commutation reactor; obtaining a half-cycle integral value S < full > (t1) calculated by taking the fault occurrence moment as a starting point and a half-cycle integral value S < full > (t2) calculated by taking the fault occurrence moment as a starting point after a period of time; and step 2, calculating S < full > (t2)-S < full > (t1), when S < full > (t2)-S < full > (t1) is greater than S < set > and continuously satisfies 3ms, locking over-current protection of the commutation reactor, and setting a setting value Sset according to 10% of a half-cycle integral value of a fundamental wave current when normal operation is avoided.
本发明涉及一种防止换相电抗过电流保护误动作的方法，包括下列步骤：步骤1：对换相电抗上安装的电流互感器采样数据进行半周绝对值积分，得到以故障发生时刻为起点计算的半周积分值S全(t1)和以故障发生一段时间后为起点计算的半周积分值S全(t2)；]]></abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION |
| title | Method for preventing over-current protection misoperation of commutation reactance |
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