A Secure H∞ based Load Frequency Control for Microgrid under Time-Delay Switch Attacks

Rapid integration of cyber and communication networks in microgrids for getting measurements and relaying controls foreshadows many necessary applications such as Load Frequency Control (LFC). The intermittent nature of renewable energy sources and increased integration of Electric Vehicle (EV), make LFC in a microgrid more challenging. These information and communication technologies offer numerous benefits but at the same time it exposes Cyber-Physical Microgrid (CPM) to intentional cyber disruptions. A cyber intrusion disguises itself and may appear as uncertainty such as Time-Delay Switch (TDS) attack and can make the microgrid inefficient or even unstable. This paper proposes a H
∞
optimal controller based on mixed-sensitivity loop shaping approach.