In order to address the limitations associated with the non-isolated dual-stage buck-boost inverters, such as residual current, lower efficiency, and harmonic current, in this paper, a single-phase single-stage transformer-less common-ground - type non-isolated buck-boost inverter is proposed (TLCGBBI). The common ground configuration of the TLCGBBI eliminates residual current and enhances the lifespan of the PV panel. It can effectively regulate the input DC voltage to meet the required output AC voltage by utilizing the intermediate impedance network. The higher voltage gain of the TLCGBBI allows the inverter to operate at lower voltage stress. The small-signal analysis has been carried out to derive the dynamic model and design a closed-loop controller for the TLCGBBI. The detailed steady-state analysis, intermediate impedance network elements design, and PWM control strategy are carried out. Furthermore, to illustrate the distinctive characteristics of the TLCGBBI, a comparative analysis is provided in terms of cost and volume. Finally, the theoretical analysis is validated using MATLAB simulation, and the ensuing results are presented.
Single-phase Single-stage Transformer-less Common Ground-based Buck-boost Inverter
31.07.2024
1811968 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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