Current Sensorless Individual MPPT Control on a Cascaded H-Bridge Multilevel Inverter

Bertin, Thibault; Despesse, Ghislain; Thomas, Remy

doi:10.1109/pemc51159.2022.9962901

Cited by 1 publication

(3 citation statements)

References 17 publications

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“…When selecting the voltage ripple value ∆V PV , it is important to consider its impact on PV power extraction. Figure 2 presents the evolution of the mean output power with the voltage ripple [23]. This figure was obtained considering the average output power of a single solar panel for a given voltage ripple around the optimum voltage and for a given solar irradiance.…”

Section: Dc-link Capacitormentioning

confidence: 99%

“…First, it was demonstrated that it is possible to control the CHBMLI with a hardware architecture having up to 20 modules with a switching frequency of 20 kHz [36]. A second paper detailed how this topology can be controlled with a reduced number of sensors [23] while operating, for each solar panel, an individual Power Point Tracking (MPPT) algorithm with minimum power oscillations. Those papers demonstrate that the CHBMLI can be controlled with low-cost components while maintaining a wide range of operations (number of modules > 20).…”

Section: Experimental Measurements For the Chbmlimentioning

confidence: 99%

“…Most solar inverters on the market are based on the conventional H-Bridge topology. In a previous paper, the authors have demonstrated that, with a specific hardware architecture, it is feasible to control a CHBMLI with at least 8 modules (and up to 20) with a switching frequency of 20 kHz [23]. The prototype was built using low-cost local electronics on each H-Bridge without the need for isolated measurements and isolated drivers compared to other prototypes presented in the literature [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Comparison between a Cascaded H-Bridge and a Conventional H-Bridge for a 5-kW Grid-Tied Solar Inverter

2023

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This paper compares the cost and efficiency of two inverter topologies for a 5-kW grid-connected solar inverter application: the Conventional H-Bridge Inverter (CHB) and the Cascaded H-Bridge Multilevel Inverter (CHBMLI). Emphasis is put on power switches and passive elements with a detailed study of the losses. Both designs respect the same constraints (cost, efficiency, and junction temperature of the transistors) to ensure a fair comparison between both topologies. The work highlights the important parameters when choosing the components (MOSFETs, capacitors, and magnetic cores for the inductors). The DC-link voltage ripple and the output AC current ripple are the key parameters for the design of the passive elements (capacitors and inductors). On top of that, the transistors MOSFETs are chosen, in both topologies, to limit the conduction losses (by selecting the Rdson) and the switching losses (by selecting the Qrr and dv/dt). Real components are picked in order to make the comparison as complete as possible. Numerical simulations are performed using the MATLAB platform. All equations and parameters are provided. A CHBMLI prototype was built with eight independent H-Bridges to validate the proposed design with thermal and efficiency measurements.

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Section: Dc-link Capacitormentioning

confidence: 99%

Section: Experimental Measurements For the Chbmlimentioning

confidence: 99%