During operation, yber-physical systems (CPS) are constantly exposed to a wide range of factors that affect their technical condition in different ways. CPS combine a huge number of sensors and actuators to interact with each other and with the environment. The collection and processing of signals from sensors that measure the physical parameters of processes are carried out to identify anomalies and predict the state of the system to ensure its functional safety and optimal functioning. As the interaction in the CPS environment increases, physical systems become more vulnerable to threats. Understanding threats and their consequences, identifying the unique properties of CPS are key trends in ensuring their functional security. The degree of readiness of the CPS to perform the tasks and functions assigned to them essentially depends on the uninterrupted autonomous power supply of the installed sensors.