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In standard implementations of distributed secondary control for DCMicroGrids (MGs), the exchange of local measurements among neighboring controlagents is enabled via off-the-shelf wireless solutions, such as IEEE 802.11.However, Denial of Service (DoS) attacks on the wireless interface throughjamming prevents the secondary control system from performing its main tasks,which might compromise the stability of the MG. In this paper, we proposenovel, robust and secure secondary control reconfiguration strategy, tailoredto counteract DoS attacks. Specifically, upon detecting the impairment of thewireless interface, the jammed secondary control agent notifies its peers via asecure, low-rate powerline channel based on Power Talk communication. Thistriggers reconfiguration of the wireless communication graph through primarycontrol mode switching, where the jammed agents leave the secondary control byswitching to current source mode, and are replaced by nonjammed current sourcesthat switch to voltage source mode and join the secondary control. The strategyfits within the software-defined networking framework, where the networkcontrol is split from the data plane using reliable and secure side power talkcommunication channel, created via software modification of the MG primarycontrol loops. The simulation results illustrate the feasibility of thesolution and prove that the MG resilience and performance can be indeedimproved via software-defined networking approaches.

Anti-Jamming Strategy for Distributed Microgrid Control based on Power Talk Communication