Resilient Economical Operation of DC Microgrid Clusters with Heterogeneous Sources

Abstract

This paper presents the resilient operation of interconnected DC microgrid (MG) clusters with heterogeneous sources, under consensus based economical dispatch. The cyber physical structure of microgrids has been implemented to attain global economical operation of the energy storage devices in coupled MG clusters, which are dispatchable in nature. In practice, DC microgrids will also possess renewable energy sources which are intermittent and non-dispatchable. As such, we have considered a photovoltaic (PV) source along-with the batteries in every MG cluster. We have investigated the effect of cyber intrusions in the exchanged voltage information, on the operation of the interconnected clusters. Mitigation and detection technique has been proposed to detect the presence of cyber adversary and also, to maintain the economical operation of the DC MG clusters. The topology of the interconnected clusters, control strategy and the mitigation is developed in a real time platform using the real time digital simulators (RTDS). Extensive real-time simulations are done to validate the proposed detection and mitigation technique.