Evaluation of conduction and switching losses in cascaded multilevel inverters

Mirizadeh, Ali; Baroogh, Farshid Abdolahnejad; Gheydi, Milad; Zarrabi, Houman; Farhadi, Payam

doi:10.1109/atee.2017.7905072

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…Existing power loss analysis research is also found lacking as it either fails to use practical methods for finding parameters [14,15], does not define the loss model at all [16], or does detailed analysis of a highly idealised model [17].…”

Section: Introductionmentioning

confidence: 99%

Quantitative power loss analysis and optimisation in N th‐order low‐voltage multilevel converters

Petersen

Stone

Foster

et al. 2019

IET Power Electronics

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Focusing on cascaded H-bridge converters for grid-tie battery energy storage, a practical, analytical method is derived to evaluate the switching-associated power loss in multilevel converters, evaluated from a number of sources of loss. This new method is then used to find performance trends in the use of converters of increasing order over a range of switching frequencies. This includes an experimental analysis into predicting the performance of MOSFET body diodes. Authors' analysis with this model shows that a multilevel converter can have lower losses than the equivalent single-bridge, three-level converter, particularly at higher switching frequencies, due to the availability of suitable switching devices. It also has interesting implications for enabling the use of cutting-edge non-silicon power switching devices to further improve potential efficiencies.

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Section: Introductionmentioning

confidence: 99%

Quantitative power loss analysis and optimisation in N th‐order low‐voltage multilevel converters

Petersen

Stone

Foster

et al. 2019

IET Power Electronics

View full text Add to dashboard Cite

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A new symmetric modular eleven‐level inverter using single and double source unit for low voltage applications with reduced number of switches

Fakhri

Laali

Naderi

et al. 2023

IET Power Electronics

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This study proposes a modular multilevel inverter for low‐voltage applications, including ac‐coupled renewables and energy storage systems. These inverters require many switches and gate drivers in their structures, which complicates the control system, reduces efficiency, and increases costs. This study introduces a new modular multilevel inverter that can produce five levels of positive voltage using only six power switches and five DC voltage sources. The basic unit is composed of a single‐ and double‐source (SDS) unit. SDS reduces the number of power electronic components, such as the insulated gate bipolar transistors, freewheeling diodes, gate driver circuits, dc voltage sources, and blocking voltage by switches. The proposed topology can boost the number of output voltage levels and decrease the number of switching devices and voltage stress using some combinations of basic submodules. The performance of the proposed 11‐level single‐phase inverter is compared with that of the conventional structures and recent symmetric topologies considering the number of switches, cost, and efficiency. The waveform quality and both the voltage and current harmonic characteristics were determined in accordance with IEEE 519–2014. Finally, an 11‐level prototype was constructed to validate the theoretical analysis, feasibility, and effectiveness of the proposed inverter.

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