The present disclosure relates to power systems. The teachings thereof may be embodied in power electronic systems. For example, a power electronic system for operating a load may comprise: a number of power modules connected to the load, each comprising at least one switching element and a local actuator; a superordinate controller for actuating the power modules; a device bus connected to the superordinate controller via which the control signals for actuating the power modules are transmitted; the superordinate controller transmitting the control signals in respective messages at predefined intervals of time; wherein all power modules scan a first communication edge of a received message and process it as a common time base of the system.