<p>Power systems are essential in the current lifestyle and the demand on the electricity is continuously increasing. To meet the demand load and to provide customers with the required electricity, power generation areas have been connected to maintain the supply even though one generation area fails. This study investigates the risk of cyber-attacks on power systems, which can result in instability and system failure. Specifically, the focus is on the stabilization of a multi-area interconnected power system (MAIPS) when subjected to a denial of service (DoS) attack that disrupts communication channels. First, we apply a controller with static feedback to stabilize the MAIPS under normal conditions. Next, we examine the system’s stability under DoS attack, while considering certain parameters such as the duration and frequency of the attack. Finally, we present an example of a three-area interconnected power system with multiple scenarios to show the efficacy of the presented method. The proposed method successfully maintains the MAIPS’ stability in the nominal situation and the presence of DoS attack. Moreover, the overshoot of the states during the transient response is small and the time needed to get the system stabilized is reasonable.</p>