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Global Stable Control Scheme of Hexverter for Fractional Frequency Transmission System

This paper propose a novel control scheme of Hexverter in Fractional frequency transmission system (FFTS) application, which is based on the interconnection and damping assignment passivity-based control (IDA-PBC) methodology. This scheme characterize the global stability and strong robustness. Firstly, the frequency decoupled model of Hexverter is studied and then port-controlled Hamiltonian (PCH) model is built. On this basis, the IDA-PB control scheme of the Hexverter is designed. Considering the interference of system parameters and unmolded dynamics, integrators are added to the IDA-PB controller to eliminate the steady-state error. Finally, The simulation results are presented to verify that the proposed control scheme have good operation performance and strong robustness.