Study of Three Phase VSC Models for Controller Design by Using Port-Controlled Hamiltonian

The Port-Based system modeling is applied and becomes an attractive topic in the field of control engineering. Due to its energy based concept, it can model physical systems in an effective and systematic manner, e.g. Port-Controlled Hamiltonian approach. However different model structures can be obtained, if the system contains switching devices, e.g. voltage source converter. This paper presents two approaches for converter modeling and their effect on the system behavior, when the controller is designed by the IDA-PBC concept. The simulation results show that the responses of the closed loop system hardly depend on the structure of converter model, even the obtained controllers are different. Especially when the systems operate around the operating point.