  This paper discusses the challenges faced by cyber-physical microgrids (MGs)
due to the inclusion of information and communication technologies in their
already complex, multi-layered systems. The work identifies a research gap in
modeling and analyzing stealthy intermittent integrity attacks in MGs, which
are designed to maximize damage and cancel secondary control objectives. To
address this, the paper proposes a nonlinear residual-based observer approach
to detect and mitigate such attacks. In order to ensure a stable operation of
the MG, the formulation then incorporates stability constraints along with the
detection observer. The proposed design is validated through case studies on a
MG benchmark with four distributed generators, demonstrating its effectiveness
in detecting attacks while satisfying network and stability constraints.
