Design of a Novel State-Feedback Controller for a LinearUncertain Switched Z-Source Impedance Network ApplyingLMI-Method

The Z-source converter is a recently proposed converter topology that utilizes special X shape Impedance network on its dc side for obtaining both voltage-buck and boost possibility. In the process of designing and analyzing z-source inverter, knowing transfer function of z-source network is necessary. In this paper a state space of z-source impedance network is represented. Stability analysis is accomplished and reveals that impedance network includes a right-hand-plane pole and its value changes considerably by considering uncertainty in network parameters. In order to stabilize the network, a static state-feedback controller is designed by solving Algebraic Riccati equation in the form of linear matrix inequality (LMI). Eventually, simulation results done by MATLAB are presented

Keywords:

Z-source impedance network , state feed-back controller , Algebraic Riccati equation