Abstract:
Increasing DC load demand and after successful transmission of electric power
through HVDC lines made cause to get attention of researchers towards distribution in
DC instead of AC. DC power distribution has become a hot topic for research in recent
past years, even though it has given up a long time ago. Researchers are making a
number of research efforts for DC distribution field; especially the time, from when
the idea of DC distribution for DC Microgrids has become significant research topic
for researchers. System efficiency, still is one of the under- research areas of DC
distribution and it is the one of the parameters, which is used to evaluate the system
performance and from which we can have a strong argument for replacing the
distribution system from AC to DC once. As the DC microgrid efficiency over the AC
grid needs future investigation from smart grid perspective, the AC microgrid tools
may not be remained applicable for DC microgrids and the spread of DC microgrid
has expected to be prevailed. Therefore, there is a need to further address the
aforementioned limitations with mathematical model to evaluate system efficiency for
given parameters and scenarios. The mathematical modeling which is still missing in
this research area, is the basic focus of the current study. therefore, this research work
as proof of the concept is proposed to achieve a mathematical model consisting on 3D
matrices based newly derived set of equations. The proposed model evaluates the
system efficiency for worst, normal and best scenarios of DER embedded multi-class
load based residential DC Microgrids (MGs) and Multi-Microgrids (MMGs). After
that a comprehensive sensitivity analysis across various cases and respective scenarios
is presented to evaluate overall system performance and impacts of system parameters
on system efficiency have been shown in this research effort.
