High step-up quasi-Z-source DC–DC converters with single switched capacitor branch

Abstract

Aiming to integrate the respective merits of the switched-capacitor converter and the quasi-Z-source converter. An novel high step-up quasi-Z-source DC-DC converter with a single switched-capacitor branch is proposed. Compared to other high boost DC-DC converters, the proposed converter can provide higher output voltage gain, lower current stress across the switches, and lower voltage stress across the output diodes by using the same or similar passive and active components. Therefore, the efficiency and reliability of the converter can be improved. The topological derivation, operating principle, parameter selection, and comparison with other DC-DC converters are presented. Finally, both simulations and experimental results are given to verify the characteristics of the proposed converter.

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

“…Microgrids, which can flexibly integrate energy into power systems, mainly consist of loads, energy storage devices, distributed power sources, energy conversion devices, etc. [2]. At present, renewable energy is an important power source in the microgrid [3,4].…”

Analysis, Design and Implementation of a Non‐isolated Switched Inductor/Capacitor Converter with Low Voltage Spikes

“…However, the stress of the semiconductor device increases, and then the efficiency decreases. AH‐SLC and SH‐SLC converters can obtain ten times greater voltage gain by replacing the inductor with the switched inductor [17–19]. However, it is difficult for SL converter to realize so much voltage gain.…”

Evaluation of cascaded voltage step‐up cells applied to the quasi‐Z‐source DC–DC converter

“…In the literature, different cells are applied to qZS network to achieve high‐voltage gain. The switched capacitor and switched inductor are associated with qZS in [19–21]. In [22] the authors discuss an approach of the voltage‐fed qZS inverter with continuous input current gained by the combination of the cascaded qZS cell.…”