Abstract:
Integration of DC Nanogrids (NGs) with distributed generators (DGs) have seen an
unprecedented growth for rural electri cation. Stable and coordinated operation
of these NGs needs to meet up many challenges such as interactive power sharing
among NGs, distribution losses, economic dispatch (ED) and power transients.
Various communication-less control schemes fall short to ful ll these challenges. In
this paper, a multi-agent system (MAS) based coordinated control strategy is proposed
to provide optimal resource sharing among NGs with minimized distribution
losses, ED and an improved load/generation side power transient control for NGC.
The system architecture presented in this research consists of a group of NGs/-
households, which can operate independently as well as with the coordination of
neighboring NGs with minimum distribution/line losses. Further, an optimization
based ED problem provides a trade-o between DG power and power shared from
neighboring NGs to meet up the load demand of each NG. An improved power
transient control for ED problem is achieved by Augmented Lagrangian based
proportional integral derivative (PID) controller. A multi-agent communication
structure is utilized for distributed coordinated control of NGs. The e ciency of
proposed model is validated by various case study scenarios using MATLAB. The
results show that ED problem is solved for each NG, which result in an optimal
resource sharing considering distribution losses and an improved power transient
control in response to the power variations in load/generation side.
