  A non-centralized model predictive control (MPC) scheme for solving an
economic dispatch problem of electrical networks is proposed in this paper. The
scheme consists of two parts. The first part is an event-triggered
repartitioning method that splits the network into a fixed number of
non-overlapping sub-systems {(microgrids)}. The objective of the repartitioning
procedure is to obtain self-sufficient microgrids, i.e., those that can meet
their local loads using their own generation units. However, since the
algorithm does not guarantee that all the resulting microgrids are
self-sufficient, the microgrids that are not self-sufficient must then form a
coalition with some of their neighboring microgrids. This process becomes the
second part of the scheme. By performing the coalition formation, we can
decompose the economic dispatch problem of the network into coalition-based
sub-problems such that each subproblem is feasible. Furthermore, we also show
that the solution obtained by solving the coalition-based sub-problems is a
feasible but sub-optimal solution to the centralized problem. Additionally,
some numerical simulations are also carried out to show the effectiveness of
the proposed method.
