Minimization of Adverse Effects of Communication Delays Caused by Cyber-Attacks on Smart Power Grid

Sagnika Ghosh and Mohd Hasan Ali
University of Memphis, Tennessee, United States

Keywords: Communication delay, cyber-attacks, smart power grid

In modern power systems, there are a large variety of measurements that are communicated for purposes of control. The time required to transmit data from the measurement location to a control center or data concentrator, and the time required ultimately to communicate these data to control devices, is collectively denoted as communications delay or latency. Such communication delay occurs in various stages of the control systems. The introduction of time delay in a feedback loop has a destabilizing effect and reduces the effectiveness of control system damping. In some cases, system synchronism may be lost. Cyber-attacks, such as the packet drop attack, distributed denial of service [DDoS] attack, tampering communication data/signal, etc., may cause significant delays in the smart power grid. Based on this background, this research focuses on minimization of negative effects of such delays in a smart gird system. So far, the prediction method has been used to minimize the negative effects of time delay. In this project, various novel and suitable control means are being explored to minimize negative effects of time delays with a view to realizing a resilient and secure smart grid system.