Z-SOURCE CONVERTERS provide efficient means for electric power conversion (dc–dc, dc–ac, ac–dc, ac–ac) between source and load in a wide range of applications. Z-source converters have been experiencing, in terms of research and applications, a constant growth during the last 15 years. The efforts of research have led to a rapid development of different Z-source convertertopologies, modulation techniques, and control strategies. Nevertheless, many interesting aspects, such as efficiency improvement, optimized parameters, and new applications, still require more investigation. We encourage all researchers working in this area to submit papers to this Special Session.