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Nya koncept för huvudskenstråki SVC-anläggningar
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology.
2017 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

ABB FACTS (Flexible Alternating Current Transmission Systems) technologies provide power and control for existing AC grids as well as green-field networks with minimal environmental impact. Static VAR Compensators (SVCs) are devices that can quickly and reliably control the stability of the line voltages. The SVC consists of a number of components, such as thyristors, capacitors, inductors that are connected to conductors in the main bus bar.

 

Today, the bus bar consists of either three or six conductors for providing the SVC with power. The length of the main bus bar can be up to 150 meters and is held up by beam constructions in the form of portals. The distances between the portals are about six meters. It is a durable structure but seemed to be over-dimensioned. This means that material, work hours and thus the cost may be cut down without affecting the performance of the structure.

 

This thesis investigates the mentioned issue. By using Finite Element Analysis (FEA) the mechanical performance of the current bus bar design can be obtained and visualized. Different new concepts were generated and evaluated against predefined design criteria. The concepts that considered viable were evaluated further using FEA and compared with the current design.

 

Two selected new concepts reduced 50 % of material, calculated in steel weight, compared with the current design. In the parts of the world, where seismic activity are not prevalent, the material reduction was about 65 %. Both two concepts could stand the so called short circuit loads and wind loads. With a minor structure strengthening they could also resist extreme earthquakes.

 

It should be noted that some data and results are not included in this report due to the confidential agreements. The FEA results are compiled in the supplementing documents 1, 2 and 7. Document 7 gives also a detailed review on how the results are interpreted.

ABB FACTS (Flexible Alternating Current Transmission Systems) technologies provide power and control for existing AC grids as well as green-field networks with minimal environmental impact. Static VAR Compensators (SVCs) are devices that can quickly and reliably control the stability of the line voltages. The SVC consists of a number of components, such as thyristors, capacitors, inductors that are connected to conductors in the main bus bar.

 

Today, the bus bar consists of either three or six conductors for providing the SVC with power. The length of the main bus bar can be up to 150 meters and is held up by beam constructions in the form of portals. The distances between the portals are about six meters. It is a durable structure but seemed to be over-dimensioned. This means that material, work hours and thus the cost may be cut down without affecting the performance of the structure.

 

This thesis investigates the mentioned issue. By using Finite Element Analysis (FEA) the mechanical performance of the current bus bar design can be obtained and visualized. Different new concepts were generated and evaluated against predefined design criteria. The concepts that considered viable were evaluated further using FEA and compared with the current design.

 

Two selected new concepts reduced 50 % of material, calculated in steel weight, compared with the current design. In the parts of the world, where seismic activity are not prevalent, the material reduction was about 65 %. Both two concepts could stand the so called short circuit loads and wind loads. With a minor structure strengthening they could also resist extreme earthquakes.

 

It should be noted that some data and results are not included in this report due to the confidential agreements. The FEA results are compiled in the supplementing documents 1, 2 and 7. Document 7 gives also a detailed review on how the results are interpreted.

Place, publisher, year, edition, pages
2017. , 27 p.
Keyword [sv]
SVC, Huvudskenstråk, Skenstråk
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:uu:diva-328650ISRN: UTH-ING-UTB-EX-M-2017/07-SEOAI: oai:DiVA.org:uu-328650DiVA: diva2:1136762
External cooperation
ABB
Educational program
Bachelor Programme in Mechanical Engineering
Supervisors
Examiners
Available from: 2017-08-29 Created: 2017-08-29 Last updated: 2017-08-29Bibliographically approved

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