Adaptive closed‐loop state control system for a three‐level neutral‐point‐clamped Z‐source inverter

• DOI: 10.1049/iet-est.2015.0010
• Publication Date: 2015-11-18T17:14:59Z
• Authors: Martin Stempfle; Steffen Bintz; Julian Wölfle; Jörg Roth‐Stielow
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 7. Clean energy

Z-source inverter (ZSI) combines the electrical function of a DC/DC converter and a three-phase inverter. This study deals with a three-level neutral-point-clamped (NPC) ZSI which brings an additional electrical potential. The benefit is the lower output current ripple of each phase. Due to the non-linear behaviour of the Z-source control path, designing an accurate and especially a dynamic control can be challenging. This study presents a design of an adaptive control for a three-level NPC ZSI to fulfil the previously mentioned goals. The correct functionality of the control system is underlined with measurements at different operating points. A possible application field for three-level ZSIs are hybrid and electric vehicles.