Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Switchgear"”.
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Untersuchungen zur Beeinflussung des durch Störlichtbögen verursachten Überdrucks in elektrischen Anlagen
… can lead to powerful fault arcs. As a result switchgear installations and even substation buildings may be endangered by thermal and mechanical stress. Metal enclosed switchgears can withstand some hundred mbar overpressure, substation buildings e. g. constructed of bricks may be damaged by …
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Applying an analytical framework to production process improvement
As the medium voltage switchgear industry moves from air insulated to gas insulated technology, Siemens Frankfurt factory is introducing a new gas insulated product line that will improve their relative market position. It is their intent to design a product and supporting production system that …
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A new approach to partial discharge measurements for testing electrical insulation systems
… models the complete response of a gas-insulated switchgear chamber has shown that PDs with a consistent pulse width produce correlation patterns that resemble a quadratic relationship. Additionally, direct PD current pulse measurement has shown a large variation in current pulse shape with faster …
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Calculation of pressure rise in electrical installations due to internal arcs considering SF 6-air mixtures and arc energy absorbers
… mixtures have to be considered (SF6-insulated switchgear) or if arc energy absorbers are installed. In this thesis, both effects, which are important for pressure rise in the case of internal arcing, are treated. The key point of modelling SF6-air mixture flows of changing composition is the …
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Modellierung der Auswirkungen von Störlichtbögen in elektrischen Anlagen
… determination of the temperature development in switchgears. In a further Appendix, the wall deformation is simulated in the substation with switchgear by the effect of the pressure due to the internal arc. The speciality to the fact is that the conditions of support of the walls and …
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Power Line Communication for Low-Data-Rate Energy Control
… conditions. Unfortunately, loads and electrical switchgear can easily interfere with power line communication (PLC) in both direct and subtle ways. However, due to the infrequent switching needs of TCLs and the long physical time constants associated with their thermal loads, the demand-leveling …
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Research on Vibration-AE Fusion Detection Technology for Metal Particle Defect in GIS under Electromechanical Coupling Condition
Gas-Insulated Switchgear (GIS) is a critical transformation and switching equipment in power systems, and its operating condition directly affects grid safety and stability. Studies have shown that under high-voltage and high-current conditions, GIS is simultaneously subjected to electric field and …