Engineering Commons^™

Ground Fault Location Of Cable Using Wavelet In Dc Microgrid, Junyang Yu

Theses and Dissertations

As the proliferations of distributed generation and power electronic equipment in power systems, more and more researchers put focus on the DC microgrid. This study is based on cables in DC community microgrid. Single ground fault is considered in the cables connected hub garage and participating garages. With long length compared to other cables in the system, it is necessary to study the method to locate the ground fault when the fault happen in the buried cables.

Two approaches are studied. The traveling wave method is applied for analysis of transient process when the fault happens while the stable parameter …

Plug-In Grid Compatible Next Generation Power Converters, Qianqian Jiao

Theses and Dissertations

The utilization of the DC low voltage distribution opens new possibilities for network development. Community DC microgrid is considered as an efficient solution for providing clean energy for residential areas. The connection of the DC microgrid to the AC utility grid would need a power electronic based rectifier. Voltage Source Rectifier (VSR) and Current Source Rectifier (CSR) are considered as the two options for such application. This study compares the two topologies based on their power density and efficiency. Silicon Carbide (SiC) switches are used for designing the rectifiers to get better power density and efficiency. The proximity of the …