Capacitor Voltage Regulation Strategy for 7-Level Single DC Source Hybrid Cascaded Inverter

Ren, Lingyun; Zhang, Lei; Wang, Li; Dai, Shangjian

doi:10.1109/jestpe.2022.3172146

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Regarding Table II, it can be seen that among other compared topologies, only the proposed inverter can limit the capacitor charging current spike of capacitors during charging mode. Compared with topologies of [16]- [18], [20], [22], [23], [25], and [29], the proposed inverter has the maximum value of power density. Considering Table II, from the point of CF/Nlevel, the proposed inverter has the minimum vale of this cost factor compared with all of topologies.…”

Section: Comparisonmentioning

confidence: 99%

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A New High Step-Up SC-Based Grid-Tied Inverter With Limited Charging Spike for RES Applications

Marangalu,

Kurdkandi,

Monfared

et al. 2024

IEEE Open J. Power Electron.

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Switched capacitor multilevel inverter topologies are attractive among industrial power electronics researchers due to their applicability in sustainable energy systems such as renewable energy source (RES) applications. In this paper, a new switched capacitor (SC)-based grid-tied seven-level inverter is proposed for renewable energy sources (RES) applications. The proposed inverter can generate a seven-level output voltage waveform with voltage boosting ability and a gain factor of 3. Also, the proposed topology can provide the self voltage balancing for capacitors. The most important challenge of the SC-based topologies, i.e., the capacitor charging spike current, is solved by applying a soft charging circuit in the charging loop of the capacitors. The soft charging circuit consists of an inductor and a power diode in the capacitor charging path. Using a small size inductor in the soft charging circuit, the proposed inverter can limit the input current spikes. Comprehensive experiment results and comparisons are presented to verify the accurate performance of the proposed inverter.

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Section: Comparisonmentioning

confidence: 99%

“…Considering Table II, compared with topologies of [15], [16], [19], [21], [24], [25], and [29], the proposed inverter has the minimum value of TSVpu. Also, the proposed inverter can provide the voltage boosting feature with a gain factor of 3, unlike the topologies of [16]- [20].…”

Section: Comparisonmentioning

confidence: 99%