High-Precision Sensing of DC Bias in AC Grids
This paper proposes a novel method for detecting parasitic dc components in ac grids. The method uses a parallel-connected sensing reactor and a low-cost digital signal processor. From the reactor current, the algorithm derives a sum of even harmonics, considering at the same time their phase shift...
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| Veröffentlicht in: | IEEE transactions on power delivery 2015-06, Vol.30 (3), p.1179-1186 |
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| container_title | IEEE transactions on power delivery |
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| creator | Vukosavic, Slobodan N. Peric, Ljiljana S. |
| description | This paper proposes a novel method for detecting parasitic dc components in ac grids. The method uses a parallel-connected sensing reactor and a low-cost digital signal processor. From the reactor current, the algorithm derives a sum of even harmonics, considering at the same time their phase shift with respect to the fundamental. The method is insensitive to the measurement noise and offset, and it does not require additional passive filters. Precision better than 100 μV in 0.4-kV grids is maintained over a wide range of ac voltages. This paper details the detection method, provides the guidelines for the reactor design, and includes the key implementation details related to the signal acquisition-sampling and digital processing. High precision of the new sensor is thoroughly verified on an experimental setup connected to a 0.4-kV grid. |
| doi_str_mv | 10.1109/TPWRD.2014.2386257 |
| format | Article |
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The method uses a parallel-connected sensing reactor and a low-cost digital signal processor. From the reactor current, the algorithm derives a sum of even harmonics, considering at the same time their phase shift with respect to the fundamental. The method is insensitive to the measurement noise and offset, and it does not require additional passive filters. Precision better than 100 μV in 0.4-kV grids is maintained over a wide range of ac voltages. This paper details the detection method, provides the guidelines for the reactor design, and includes the key implementation details related to the signal acquisition-sampling and digital processing. 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The method uses a parallel-connected sensing reactor and a low-cost digital signal processor. From the reactor current, the algorithm derives a sum of even harmonics, considering at the same time their phase shift with respect to the fundamental. The method is insensitive to the measurement noise and offset, and it does not require additional passive filters. Precision better than 100 μV in 0.4-kV grids is maintained over a wide range of ac voltages. This paper details the detection method, provides the guidelines for the reactor design, and includes the key implementation details related to the signal acquisition-sampling and digital processing. High precision of the new sensor is thoroughly verified on an experimental setup connected to a 0.4-kV grid.</description><subject>Distributed power</subject><subject>grid-connected converters</subject><subject>Harmonic analysis</subject><subject>Inductors</subject><subject>Magnetic cores</subject><subject>nonlinear magnetics</subject><subject>power grids</subject><subject>Power harmonic filters</subject><subject>power system measurements</subject><subject>power transformers</subject><subject>Resistance</subject><subject>Sensors</subject><subject>voltage measurement</subject><subject>Windings</subject><issn>0885-8977</issn><issn>1937-4208</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9z81KAzEYheEgCo7VG9BNbiD1-_KfZZ1qKxQsWnEZZjKZGtEZSdx491pbXJ3Ve-Ah5BJhigjuerN-eZxPOaCccmE1V-aIVOiEYZKDPSYVWKuYdcackrNS3gBAgoOKsGXavrJ1jiGVNA70KQ4lDVs69nRe05vUFJoGOqvpIqeunJOTvnkv8eKwE_J8d7upl2z1sLivZysWuDZfLAhA0wsHxnRKu1ZzbINEhwZDsBxV6IzQwTUy9tE0LVdKQ9N2SgZtsFViQvj-N-SxlBx7_5nTR5O_PYLfgf0f2O_A_gD-ja72UYox_gfaOWu1FD8Fxk9_</recordid><startdate>201506</startdate><enddate>201506</enddate><creator>Vukosavic, Slobodan N.</creator><creator>Peric, Ljiljana S.</creator><general>IEEE</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>201506</creationdate><title>High-Precision Sensing of DC Bias in AC Grids</title><author>Vukosavic, Slobodan N. ; Peric, Ljiljana S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c267t-c3017f39077d569b621bc419171cc8215cd736c9a4efe7ab25560abd54c671b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Distributed power</topic><topic>grid-connected converters</topic><topic>Harmonic analysis</topic><topic>Inductors</topic><topic>Magnetic cores</topic><topic>nonlinear magnetics</topic><topic>power grids</topic><topic>Power harmonic filters</topic><topic>power system measurements</topic><topic>power transformers</topic><topic>Resistance</topic><topic>Sensors</topic><topic>voltage measurement</topic><topic>Windings</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vukosavic, Slobodan N.</creatorcontrib><creatorcontrib>Peric, Ljiljana S.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998–Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><jtitle>IEEE transactions on power delivery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Vukosavic, Slobodan N.</au><au>Peric, Ljiljana S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High-Precision Sensing of DC Bias in AC Grids</atitle><jtitle>IEEE transactions on power delivery</jtitle><stitle>TPWRD</stitle><date>2015-06</date><risdate>2015</risdate><volume>30</volume><issue>3</issue><spage>1179</spage><epage>1186</epage><pages>1179-1186</pages><issn>0885-8977</issn><eissn>1937-4208</eissn><coden>ITPDE5</coden><abstract>This paper proposes a novel method for detecting parasitic dc components in ac grids. The method uses a parallel-connected sensing reactor and a low-cost digital signal processor. From the reactor current, the algorithm derives a sum of even harmonics, considering at the same time their phase shift with respect to the fundamental. The method is insensitive to the measurement noise and offset, and it does not require additional passive filters. Precision better than 100 μV in 0.4-kV grids is maintained over a wide range of ac voltages. This paper details the detection method, provides the guidelines for the reactor design, and includes the key implementation details related to the signal acquisition-sampling and digital processing. High precision of the new sensor is thoroughly verified on an experimental setup connected to a 0.4-kV grid.</abstract><pub>IEEE</pub><doi>10.1109/TPWRD.2014.2386257</doi><tpages>8</tpages></addata></record> |
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| ispartof | IEEE transactions on power delivery, 2015-06, Vol.30 (3), p.1179-1186 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Distributed power grid-connected converters Harmonic analysis Inductors Magnetic cores nonlinear magnetics power grids Power harmonic filters power system measurements power transformers Resistance Sensors voltage measurement Windings |
| title | High-Precision Sensing of DC Bias in AC Grids |
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