Abstract:
The emergence of the renewable energy sources
such as the PV, fuel cells and storage systems have shifted the
view to DC Microgrid. The inherent PV DC sources provide the
compatibility with the DC loads without the need for multiple
DC/AC and DC/AC conversions. In the DC Microgrid, the
energy sources, storage units and loads are connected to a DC
Bus through DC/DC converters. In order to achieve the control
tasks and for energy management, the sources should exchange
their information through a kind of network. The PV sources
controllers communicate through communication network to
achieve current sharing. The induced time delay could destabilize
the system and it is important to determine the maximum delay
margin. The exact delay margin for the stability is computed
using the sweeping test and the binary iteration algorithm. The
controller achieves good performance even with the fluctuations
in the output of the PV sources. The impact of the DC Microgrid
parameters and the controller parameters on the delay margin is
investigated.
