Power systems are complex structures that energy production, transmission and consumption units. There are various reasons for energy interruptions on these systems. Power outage on the power system can lead to partial or complete loss of the network. Energy interruptions in large regions cause significant economic losses and precautions must be taken in this regard. In this study, Blackout situations in power systems were analyzed. Within the scope of the study, important Blackout situations encountered around the world have been examined. Blackout causes are listed and interpreted in power systems in the light of experienced events. Precautions have been put forward in order to avoid blackout situations. In addition, the effects of blackstart-equipped power plants on the recovery of the network have been examined.