The Neutral Point Clamped (NPC) three-level inverter with Z-source network is a relatively recent converter topology that exhibits both voltage-buck and voltage-boost capability. This concept can be applied to all acto-ac, dc-to-dc, ac-to-dc, and dc-to-ac power conversion whether two-level or multilevel. However, multilevel inverters offer many benefits for higher power applications. Existing p...

To eliminate the common-mode leakage current in the transformerless photovoltaic system, an improved high efficiency inverter H6 type configuration with Z-source is presented. The Z-source network can perform boost as well as sustained shoot through operation. Also, the improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to complet...

The Transformer based Z-Source inverter is an enhanced series inductance Z-Source impedance network. This proposed inverter is used to combine the main circuit and the power source. This configuration delivers a strong boost capacity to overcome the barriers of the series inductance Z-source inverter. Further, with the usage of low voltage capacitors and the transformer, the capacitor voltage s...

This paper presents the analysis for different control techniques in Z-source inverters. The voltage gain versus modulation index from simulation result is compared with the mathematical calculated voltage gain. Further detailed analysis of %THD, %harmonics of output voltage at different modulation indexes for different boosting techniques of a Z-source inverter are also performed with respect ...

This paper presents a Z-source inverter which has been proposed as an alternative power conversion concept for adjustable speed AC drives. It is having both voltages buck and boost capabilities as they allow inverters to be operated in the shoot through state. It utilizes an exclusive Z-source network (LC component) to DC-link in between main inverter circuit and the DC source (rectifier). By c...

This paper compares two finite-control-set model predictive control (FCS-MPC) strategies in the context of a grid-connected single-phase quasi-Z source inverter (SP-qZSI). Both schemes use discrete-time models inductor current and capacitor voltage for DC side, as well output on AC side. To enhance converter’s performance, given non-minimum phase characteristics long prediction horizon is imple...