Comparative Evaluation of Advanced Three-Phase Three-Level Inverter/Converter Topologies Against Two-Level Systems

By Mario Schweizer, Thomas Friedli, J. W. Kolar. IEEE transactions on industrial electronics (1982. Print), 2013

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Transformerless Inverter Topologies for Single-Phase Photovoltaic Systems: A Comparative Review (2020, background): “However, the negative side of this topology is unbalanced conduction losses and a restricted dc-link balance [78] which affects the whole system.”
Automotive Traction Inverters: Current Status and Future Trends (2019, background): “Advanced studies have highlighted several aspects of the benefits of three-level inverters [21], [22].”
The Benefits of SiC mosfets in a T-Type Inverter for Grid-Tie Applications (2017, background): “However, the T-type topology must consequently use semiconductors with higher voltage ratings for its outer switches since they now have to block the full dc link voltage, which means that its semiconductor switching losses are generally higher compared to a NPC converter at the same switching frequ”
An Extremely High Efficient Three-Level Active Neutral-Point-Clamped Converter Comprising SiC and Si Hybrid Power Stages (2018, background): “Comparative works can be found in [8] and [9].”