Input-output linearization and PI control for a three-phase neutral point clamped boost rectifier

In this paper, PI control with input-output linearization is presented for a three-phase neural point clamped boost rectifier. The control algorithm consists of a input-output linearization inner current loop in synchronous reference frame and a PI voltage control outer-loop. There are two reference signals for this cascade controller, which are the dc link voltage reference and the q-axis current reference. They are used to regulate the dc link voltage and achieve unity power factor. A model based design method for the inner-loop and outer-loop is presented. Simulation results show the dc link control performance and the current control performance. The control performance under a distorted voltage supply condition is also shown.