Repetitive control algorithms for a real-time dynamic electronic load simulator

Different types of electronic load simulators for testing of power supply have been developed and commercialized. However, there exist many drawbacks, for example, it can only provide 4 modes including constant resistance, constant power, constant current, and constant voltage to simulate simple dc load and cannot simulate a load with dynamics such as R-L and R-C loads. In this paper, a method to construct a new dynamic power electronic load simulator (DPELS) is proposed and explored, and a newly digital repetitive control algorithm for the DPELS to reduce the load behavior simulation error is applied. The simulation and experiment results on a single phase full-bridge power amplifier with two stage output filter shows that this method can exhibit the load behavior approximately. It is verified that the proposed DPELS can replace a heap of RLC power components and achieve good dynamic response.