Sökning: "Power transformer"
Visar resultat 21 - 25 av 78 avhandlingar innehållade orden Power transformer.
21. Electromagnetic Modelling of Power Transformers for Study and Mitigation of Effects of GICs
Sammanfattning : Geomagnetic disturbances that result from solar activities can affect technological systems such as power networks. They may cause DC currents in power networks and saturation of the core in power transformers that leads to destruction in the transformer performance. LÄS MER
22. Design and Optimization Considerations of Medium-Frequency Power Transformers in High-Power DC-DC Applications
Sammanfattning : Recently, power electronic converters are considered as one of the enabling technologies that can address many technical challenges in future power grids from the generation phase to the transmission and consequently distribution at different voltage levels. In contrast to the medium-power converters (5 to 100 kW) which have beenessentially investigated by the automotive and traction applications, megawatt and medium-voltage range isolated converters with a several kilohertz isolation stage,also called solid-state transformers (SST), are still in an expansive research phase. LÄS MER
23. Evaluation and variability of power grid hosting capacity for electric vehicles : Case studies of residential areas in Sweden
Sammanfattning : Electric vehicles (EVs) are increasing in popularity and play an important role in decarbonizing the transport sector. However, a growing EV fleet can cause problems for power grids as the grids are not initially designed for EV charging. The potential of a power grid to accommodate EV loads can be assessed through hosting capacity (HC) analysis. LÄS MER
24. Fast fault detection for power distribution systems
Sammanfattning : The main topic of this licentiate thesis is fast faultdetection. The thesis summaries the work performed in theprojectFast fault detection for distributionsystems.In the first chapters of the thesis the termfastis used in a general manner. LÄS MER
25. Dynamic Rating with Applications to Renewable Energy
Sammanfattning : Dynamic rating (DR) of power components is a method for assessing real-time capacity of large scale power transmission and distribution devices (commonly: transmission lines, power transformers, underground cables) and using this knowledge for adjusting loading limits of these components. Dynamic rating of power lines or dynamic line rating (DLR) is a pioneering technology in the area of dynamic rating. LÄS MER