Branch Current Control on a Superconducting DC Grid
The challenges of transferring large levels of renewable generation output from remote locations to load centers through congested ac transmission networks has renewed interest in high-voltage dc (HVDC) transmission. Mesh-connected HVDC grids are under consideration to maximize utilization of availa...
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| Veröffentlicht in: | IEEE transactions on applied superconductivity 2013-06, Vol.23 (3), p.5401005-5401005 |
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| container_title | IEEE transactions on applied superconductivity |
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| creator | Malek, B. Johnson, B. K. |
| description | The challenges of transferring large levels of renewable generation output from remote locations to load centers through congested ac transmission networks has renewed interest in high-voltage dc (HVDC) transmission. Mesh-connected HVDC grids are under consideration to maximize utilization of available transmission accessible corridors. High-temperature superconducting (HTS) cables are candidates for future implementations of future dc grids with their high current capabilities and low losses. The branch current flows in a conventional HVDC grid are determined by voltage differences between the ends of a line, making it difficult to regulate currents in different paths. This becomes even more difficult in a superconducting grid where the steady-state voltage is equal across the system, and line current flows only change during temporary voltage differences. If a line needs to be removed from service for maintenance it is difficult to bring the current in that line to zero without de-energizing the entire system. In addition, once the line is re-energized it will not carry any load current until a voltage difference occurs. This paper will explore options to control individual branch currents on an HTS mesh by exploring controllable circuit configurations without the need to add series elements. A control scheme will be developed for a dc grid with a controllable configuration. |
| doi_str_mv | 10.1109/TASC.2012.2236813 |
| format | Article |
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K.</creator><creatorcontrib>Malek, B. ; Johnson, B. K.</creatorcontrib><description>The challenges of transferring large levels of renewable generation output from remote locations to load centers through congested ac transmission networks has renewed interest in high-voltage dc (HVDC) transmission. Mesh-connected HVDC grids are under consideration to maximize utilization of available transmission accessible corridors. High-temperature superconducting (HTS) cables are candidates for future implementations of future dc grids with their high current capabilities and low losses. The branch current flows in a conventional HVDC grid are determined by voltage differences between the ends of a line, making it difficult to regulate currents in different paths. This becomes even more difficult in a superconducting grid where the steady-state voltage is equal across the system, and line current flows only change during temporary voltage differences. If a line needs to be removed from service for maintenance it is difficult to bring the current in that line to zero without de-energizing the entire system. In addition, once the line is re-energized it will not carry any load current until a voltage difference occurs. This paper will explore options to control individual branch currents on an HTS mesh by exploring controllable circuit configurations without the need to add series elements. A control scheme will be developed for a dc grid with a controllable configuration.</description><identifier>ISSN: 1051-8223</identifier><identifier>EISSN: 1558-2515</identifier><identifier>DOI: 10.1109/TASC.2012.2236813</identifier><identifier>CODEN: ITASE9</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Circuit breakers ; Direct current networks ; Electric connection. Cables. Wiring ; Electrical engineering. 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K.</creatorcontrib><title>Branch Current Control on a Superconducting DC Grid</title><title>IEEE transactions on applied superconductivity</title><addtitle>TASC</addtitle><description>The challenges of transferring large levels of renewable generation output from remote locations to load centers through congested ac transmission networks has renewed interest in high-voltage dc (HVDC) transmission. Mesh-connected HVDC grids are under consideration to maximize utilization of available transmission accessible corridors. High-temperature superconducting (HTS) cables are candidates for future implementations of future dc grids with their high current capabilities and low losses. The branch current flows in a conventional HVDC grid are determined by voltage differences between the ends of a line, making it difficult to regulate currents in different paths. This becomes even more difficult in a superconducting grid where the steady-state voltage is equal across the system, and line current flows only change during temporary voltage differences. If a line needs to be removed from service for maintenance it is difficult to bring the current in that line to zero without de-energizing the entire system. In addition, once the line is re-energized it will not carry any load current until a voltage difference occurs. This paper will explore options to control individual branch currents on an HTS mesh by exploring controllable circuit configurations without the need to add series elements. A control scheme will be developed for a dc grid with a controllable configuration.</description><subject>Applied sciences</subject><subject>Circuit breakers</subject><subject>Direct current networks</subject><subject>Electric connection. Cables. Wiring</subject><subject>Electrical engineering. 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K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Branch Current Control on a Superconducting DC Grid</atitle><jtitle>IEEE transactions on applied superconductivity</jtitle><stitle>TASC</stitle><date>2013-06-01</date><risdate>2013</risdate><volume>23</volume><issue>3</issue><spage>5401005</spage><epage>5401005</epage><pages>5401005-5401005</pages><issn>1051-8223</issn><eissn>1558-2515</eissn><coden>ITASE9</coden><abstract>The challenges of transferring large levels of renewable generation output from remote locations to load centers through congested ac transmission networks has renewed interest in high-voltage dc (HVDC) transmission. Mesh-connected HVDC grids are under consideration to maximize utilization of available transmission accessible corridors. High-temperature superconducting (HTS) cables are candidates for future implementations of future dc grids with their high current capabilities and low losses. 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| ispartof | IEEE transactions on applied superconductivity, 2013-06, Vol.23 (3), p.5401005-5401005 |
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| source | IEEE Electronic Library (IEL) |
| subjects | Applied sciences Circuit breakers Direct current networks Electric connection. Cables. Wiring Electrical engineering. Electrical power engineering Electrical machines Electrical power engineering Electricity distribution Exact sciences and technology Firing High temperature superconductors High-voltage dc (HVDC) transmission HVDC transmission linear controller design Power networks and lines Regulation and control Superconducting cables superconducting grid Various equipment and components Voltage control |
| title | Branch Current Control on a Superconducting DC Grid |
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