Bidirectional power flow control of a power converter using passive Hamiltonian techniques

A controller able to achieve bidirectional power flow for a boost-like full-bridge rectifier is presented. It is shown that no single output yields a stable zero dynamics for power flowing both ways. The controller is computed using port Hamiltonian passivity techniques for a Suitable generalized state space averaging truncation of the system, which transforms the control objectives, namely specified output mean value of the voltage dc-bus and unity input power factor in the ac side, into a regulation problem. Simulation and experimental results for the full system confirm the correctness of the simplifications introduced to obtain the controller. Copyright (C) 2007 John Wiley & Sons, Ltd.