MicroGrid during Grid-connected mode and Islanded mode - A Review
Keywords:
Introduction, Literature Survey, Control Strategy, PQ Control, V/f Control MATLAB/SIMULINK.Abstract
There has been a keen interest on
Distributed Generation (DG) due to their
restricted goals of meeting local loads and
improving reliability of the overall system.
Micro grids (MGs) are connected to the main
grid through a Point of Common Coupling
which separates the former from the latter. At
the time of an intentional islanding or fault at
the grid level, a MicroGrid is able to disconnect
itself from the rest of the grid and operate by
itself. A MicroGrid may contain both directly
connected and inverter interfaced sources with
different control configurations. When
disconnected or islanded from the main grid
there are various approaches to share the load,
one of them being master-slave control where a
storage device may become the reference DG to
set the nominal voltage and frequency. When
the main grid is brought back to normal
operation, the MicroGrid is able to
resynchronize itself to the main grid only when
it meets certain conditions so as to avoid
transients. All the microsources, power
electronics and their control with power
management were developed in
Matlab/Simulink.
