Medium Voltage DC Testbed: A Hardware Based Tool to Integrate DC Microgrids/Nanogrids to the Utility Infrastructure

摘要

the futuristic distribution system which is one of the basic smart grid concepts can be viewed as a cluster of microgridsanogrids composed of a cluster of distributed energy resources (DER). In addition to, the exponential development of solid state transformers technology which makes it possible to directly integrate the microgridsanogrids to the medium voltage (MV) part of the power grid. The MVDC network facilitates the integration of DC microgridsanogrids clusters to the AC grid. However, this necessitates the research institutions to develop laboratory equipment to validate the hardware developed to work on the MV levels. This paper presents a design of a scaled-down MV DC laboratory testbed. The proposed system is based on Power Electronic Transformers (PETs) to provide the high step-up ratio of voltage without occupying much space. This MV DC testbed is a laboratory setup that provides a power source and a power sink for any DC hardware to be tested in the MV range. The proposed system is evaluated through Matlab Simulink simulations.