Real-time simulation of a satellite's electrical power system

In this work a real-time model description of a satellite power system has been carried out within the project Series Optimised Development- and Test-Environment as a part of the COMED (Constellation & Multimedia Entwicklungs- and Demonstrationsprogramm) study. The power system of the small satellite serves as a model baseline. The simulated electrical power system (EPS) consists of a solar generator, a NiH2-battery, a power control and distribution unit (PCDU) including a power bus with an unregulated bus voltage, a battery charge controller (BCC), a maximum power point tracker (MPPT), two ohmic loads and two converter loads. The aim of this work is to investigate the realtime performance and interaction of the power system in combination with a real-time simulated model of an Attitude and Orbit Control System (AOCS). Therefore, the software tool ROSETM (Real-time Object-oriented Software Environment, CAE has been used. In future, the simulation will also serve as a checkout tool for hardware components and further refinement will be carried out within the systems engineering department of Astrium.