Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester
The invention relates to a method and to a device for unloading a capacitor (16) of a controlled series compensator (2) as a function of the load on its suppressor (26) when high-current line defects occur. According to the invention, the energy (w) absorbed by the suppressor (26) is determined from...
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| creator | STEPHAN WEISS FRANZ-JOSEF UNTERLASS |
| description | The invention relates to a method and to a device for unloading a capacitor (16) of a controlled series compensator (2) as a function of the load on its suppressor (26) when high-current line defects occur. According to the invention, the energy (w) absorbed by the suppressor (26) is determined from a current (u1) flowing through it. A temperature gradient ( DELTA t'A) is then determined from this energy (w) as a measure of the step-function load on the suppressor (26) and is compared with a limit value (tH). This comparison value (SK) is then processed as a function of the determined actual suppressor temperature (t'A) and the measured line current (iL) to form a control signal (Si), as a result of which the converter valve (8) of the controlled series compensator (2) is driven in such a manner that its equivalent impedance is controlled in the direction from being capacitive to being inductive. The number of necessary cut-offs in the event of high-current line defects is thus considerably reduced, as a result of which the availability is significantly increased. |
| format | Patent |
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According to the invention, the energy (w) absorbed by the suppressor (26) is determined from a current (u1) flowing through it. A temperature gradient ( DELTA t'A) is then determined from this energy (w) as a measure of the step-function load on the suppressor (26) and is compared with a limit value (tH). This comparison value (SK) is then processed as a function of the determined actual suppressor temperature (t'A) and the measured line current (iL) to form a control signal (Si), as a result of which the converter valve (8) of the controlled series compensator (2) is driven in such a manner that its equivalent impedance is controlled in the direction from being capacitive to being inductive. The number of necessary cut-offs in the event of high-current line defects is thus considerably reduced, as a result of which the availability is significantly increased.</description><edition>5</edition><language>eng</language><subject>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION ; SYSTEMS FOR STORING ELECTRIC ENERGY</subject><creationdate>1993</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=19931125&DB=EPODOC&CC=AU&NR=3869193A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19931125&DB=EPODOC&CC=AU&NR=3869193A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>STEPHAN WEISS</creatorcontrib><creatorcontrib>FRANZ-JOSEF UNTERLASS</creatorcontrib><title>Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester</title><description>The invention relates to a method and to a device for unloading a capacitor (16) of a controlled series compensator (2) as a function of the load on its suppressor (26) when high-current line defects occur. According to the invention, the energy (w) absorbed by the suppressor (26) is determined from a current (u1) flowing through it. A temperature gradient ( DELTA t'A) is then determined from this energy (w) as a measure of the step-function load on the suppressor (26) and is compared with a limit value (tH). This comparison value (SK) is then processed as a function of the determined actual suppressor temperature (t'A) and the measured line current (iL) to form a control signal (Si), as a result of which the converter valve (8) of the controlled series compensator (2) is driven in such a manner that its equivalent impedance is controlled in the direction from being capacitive to being inductive. The number of necessary cut-offs in the event of high-current line defects is thus considerably reduced, as a result of which the availability is significantly increased.</description><subject>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><subject>SYSTEMS FOR STORING ELECTRIC ENERGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1993</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqFjTELwkAMhbs4iPobzB9wkILYsYji4qZzCW3OHpzJkaQu_nmv4O4QHu-9L7xl9bmRjzIAcrmcUdEngyAKSinSO_ITEHrM2EcvqYTZCrtKSjSAkUaykrwyseGMoBUkTNx7FJ4ffCRIggMUG720qmROuq4WAZPR5qerans530_XHWXpyMokMXnXPurjodk3dVv_J75U3EZG</recordid><startdate>19931125</startdate><enddate>19931125</enddate><creator>STEPHAN WEISS</creator><creator>FRANZ-JOSEF UNTERLASS</creator><scope>EVB</scope></search><sort><creationdate>19931125</creationdate><title>Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester</title><author>STEPHAN WEISS ; FRANZ-JOSEF UNTERLASS</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_AU3869193A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1993</creationdate><topic>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><topic>SYSTEMS FOR STORING ELECTRIC ENERGY</topic><toplevel>online_resources</toplevel><creatorcontrib>STEPHAN WEISS</creatorcontrib><creatorcontrib>FRANZ-JOSEF UNTERLASS</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>STEPHAN WEISS</au><au>FRANZ-JOSEF UNTERLASS</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester</title><date>1993-11-25</date><risdate>1993</risdate><abstract>The invention relates to a method and to a device for unloading a capacitor (16) of a controlled series compensator (2) as a function of the load on its suppressor (26) when high-current line defects occur. According to the invention, the energy (w) absorbed by the suppressor (26) is determined from a current (u1) flowing through it. A temperature gradient ( DELTA t'A) is then determined from this energy (w) as a measure of the step-function load on the suppressor (26) and is compared with a limit value (tH). This comparison value (SK) is then processed as a function of the determined actual suppressor temperature (t'A) and the measured line current (iL) to form a control signal (Si), as a result of which the converter valve (8) of the controlled series compensator (2) is driven in such a manner that its equivalent impedance is controlled in the direction from being capacitive to being inductive. The number of necessary cut-offs in the event of high-current line defects is thus considerably reduced, as a result of which the availability is significantly increased.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY |
| title | Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester |
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