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Microgrids (MGs) rely on networked control supported by off-the-shelfwireless communications. This makes them vulnerable to cyber-attacks, such asdenial-of-service (DoS). In this paper, we mitigate those attacks by applyingthe concepts of (i) separation of data plane from network control plane,inspired by the software defined networking (SDN) paradigm, and (ii) agilereconfiguration of the data plane connections. In our architecture, allgenerators operate as either voltage regulators (active agents), or currentsources (passive agents), with their operating mode being locally determined,according the global information on the MG state. The software-defined MGcontrol utilizes the fact that, besides the data exchange on the wirelesschannel, the power-grid bus can be used to create side communication channelsthat carry control plane information about the state of the MG. For thispurpose, we adopt power talk, a modem-less, low-rate, power-line communicationdesigned for direct current (DC) MGs. The results show that the proposedsoftware-defined MG offers superior performance compared to the static MG, aswell as resilience against cyber attacks.

Software-Defined Microgrid Control for Resilience Against Cyber Attacks