Compensation for Voltage Disruption in a Smart Grid during Cyber-Attack

Power system is turning into smart grid for ensuring efficient, reliable and economic operation. But, cyber-attack is being introduced because of involvement of cyber infrastructure in modern grid. In this paper, impacts of cyber-attack on proportional integral derivative controlled automatic voltage regulator have been analyzed. A control scheme has been proposed for compensating voltage disruption during cyber-attack. The proposed control scheme includes a controlled switching unit which ensures normal operation during an attack.