Jul 2026· International Journal of Emerging Electric Power Systems· 0 citations· 25 references
Abstract
Abstract This manuscript proposes a single-phase hybrid fault-tolerant seven-level inverter for grid-connected applications. In conventional multilevel inverters, a fault in any switching device can adversely affect the output voltage levels, making the inverter unsuitable for reliable grid integration. Therefore, incorporating fault-tolerant capability is essential to ensure uninterrupted operation. In the proposed approach, fault tolerance is achieved in a cascaded H-bridge inverter by integrating a reduced-switch inverter. The developed topology comprises a reduced-switch seven-level (RSSL) inverter in combination with two cascaded H-bridge modules. A level-shifted pulse-width modulation (LSPWM) technique is employed to generate the required gating signals for the proposed inverter. Furthermore, the capacitors in the RSSL inverter maintain inherent self-voltage balancing through the adopted control strategy. The performance, suitability, and effectiveness of the proposed fault-tolerant inverter for grid-connected applications are validated through both MATLAB/Simulink simulations and experimental hardware implementation results.
This study proposes a cascaded power conversion structure composed of a three-level DC-DC boost converter and a single-phase five-level T-type inverter to address the high performance and power quality demands of renewable energy systems. The integrated topology is designed to overcome the limitations of conventional t...
Sadık Özdemir, Zafer Ortatepe, Kadir Kunt· Gazi Üniversitesi Fen Biliml...· 0 citations
Accurate and low-cost fault diagnosis is essential for improving the reliability of cascaded neutral-point-clamped (NPC) inverters. This paper proposes a single-sensor fault diagnosis method for a single-phase three-module cascaded NPC inverter. Only one DC-side current sensor is required for the diagnostic algorithm,...
Chao Wu, Yi-Hao Wang, Pengcheng Han et al.· Machines· 0 citations
Multilevel inverters (MLIs) are widely used in energy-conversion systems because they generate high-quality AC voltages with reduced harmonic distortion. However, existing MLIs often require numerous power devices, multiple DC sources, voltage sensors, or dedicated capacitor-balancing controllers, which increases both...
Taoufiq El Ansari, Ayoub El Gadari, Y. Ounejjar· International Journal of Pow...· 0 citations
Cascaded energy storage systems are well-suited for medium- and low-voltage power grids, offering an effective solution to power quality issues caused by the integration of renewable energy sources. However, the reliability of cascaded H-bridge converters is critically challenged by the pervasive integration of power s...
Yang Zhang, Yi-Hang Liu, Liu-Qi Zhan et al.· International Conference on...· 0 citations
Three-level neutral-point-clamped (NPC) inverters are widely used in medium- and high-power drives and grid-connected applications due to their reduced device voltage stress, improved output power quality, and lower switching losses relative to conventional two-level topologies. Among the potential failure modes, clamp...
To Anh Dung, Minh Huu Nguyen, C. Trinh et al.· Engineer· 0 citations
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