The energy system of the future is expected to be composed of a large variety of technologies and applications. However, the diverse nature of these components, their interlinked topology, and the sheer size of the system lead to an unprecedented level of complexity. Needed control components, information and communication technologies and operating strategies form along with other “classic” energy systems what can be called a cyber-physical energy system \cite{Palensky_2014}. Large and complex cyber-physical energy systems integrate physical process and components with computation and communication technologies.