In order to protect smart distribution grids from intrusions, it is important to understand possible risks and impacts of attacks. We study the worst-case attack strategy of a power injection attack against the physical layer of a smart distribution grid with a high penetration of photovoltaic resources. We derive both the worst attack signal and worst attack location: The worst attack signal is a step function which switches its sign at the final stage, and the worst attack location is the node with the largest impedance to the grid substation. Numerical examples on a European benchmark model verify the developed results. Finally, both theoretical and numerical results are used to discuss feasible defense strategies against power injection attacks.
@article{arxiv.2011.05829,
title = {Power Injection Attacks in Smart Distribution Grids with Photovoltaics},
author = {Martin Lindström and Hampei Sasahara and Xingkang He and Henrik Sandberg and Karl Henrik Johansson},
journal= {arXiv preprint arXiv:2011.05829},
year = {2021}
}