Improved Switched-Capacitor Integrated Multilevel Inverter With a DC Source String

Lee, Sze Sing; Lee, Kyo‐Beum; Alsofyani, Ibrahim Mohd; Bak, Yeongsu; Wong, Jing Fang

doi:10.1109/tia.2019.2893850

Cited by 66 publications

(43 citation statements)

References 30 publications

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“…4.1.1 For 9-level: From Table 3, it can be observed that the boost factor of BDIMLI is the same as existing 9-level SCMLI topologies presented in [16,18]. The size of the capacitors used for proposed BDIMLI is reduced by ∼60-100 times as compared with the other SCMLI counterparts.…”

Section: Component Count and Boost-factormentioning

confidence: 80%

“…In recent times, several boost derived MLIs are reported using boost converter [12], Z-source network [13,14], coupled inductor [15] and switched capacitor (SC) [16][17][18] techniques. Z-source network and coupled inductor-based step-up MLIs provide high voltage gains owing to high switching stress and losses, while SCMLI topologies provide high efficiencies but require large capacitor size and switch count.…”

Section: Introductionmentioning

confidence: 99%

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Single‐phase boost DC‐link integrated cascaded multilevel inverter for PV applications

Babu

Narasimharaju

2020

IET Power Electronics

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This study presents a new boost DC-link integrated multilevel inverter (BDIMLI) topology for single-phase stand-alone photovoltaic applications. The BDIMLI is realised by the integration of two two-level boost DC-link converters (TBDCs) with a hybrid H-bridge inverter using symmetrical voltage sources. Conventional cascaded multilevel inverters require a large number of isolated DC source and circuit components. On the other side, switched capacitor multilevel inverter topologies require less number of sources and components, but need bulky capacitors. The proposed TBDC units charge the capacitors to the desired voltage with the high switching frequency, hence require less capacitance and component count. The proposed topology with proper selection of capacitor voltage levels can produce 9-, 11-and 13-level outputs without altering any circuit components. Besides, the proposed topology produces low-frequency common-mode voltage. The comprehensive analysis of BDIMLI in comparison with recent multilevel inverter topologies is presented. An experimental prototype of BDIMLI is built and its dynamic behaviour with different load conditions is presented for both 9-and 13-level operations.

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Section: Component Count and Boost-factormentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Single‐phase boost DC‐link integrated cascaded multilevel inverter for PV applications

Babu

Narasimharaju

2020

IET Power Electronics

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“…This topology lacks the boosting of the supply voltage with higher voltage stresses across the switches. A new generalised hybrid topology has been proposed in [36]. In [36], two configurations of the proposed topology has been presented with one SC unit and two SC units.…”

Section: Introductionmentioning

confidence: 99%

“…A new generalised hybrid topology has been proposed in [36]. In [36], two configurations of the proposed topology has been presented with one SC unit and two SC units. However, the use of H-bridge increases the total standing voltage (TSV) of the topology.…”

Section: Introductionmentioning

confidence: 99%

Dual input switched‐capacitor‐based single‐phase hybrid boost multilevel inverter topology with reduced number of components

Rawa

Siddique

Mekhilef

et al. 2020

IET Power Electronics

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A new switched-capacitor-based topology with features of boosting and self-voltage balancing of the capacitor has been proposed in this study. The proposed multilevel inverter topology uses two isolated dc voltage sources with a switchedcapacitor to produce 11 levels across the load. In this study, two different modes of the selection of dc voltage sources have been discussed for the proposed topology. Furthermore, the generalised structure of the proposed boost topology has also been discussed. Quantitative comparison with several topologies has been carried out to set the benchmark of the proposed topology. Selective harmonic elimination pulse width modulation technique has been adopted to improve the performance of the suggested topology. The power loss analysis of the proposed topology gives the maximum efficiency of 96.5% at the output power of 100 W and has an efficiency value of 95.3% at the output power of 500 W. The proposed topology has been simulated using PLECS and the simulation results have been verifying using an experimental prototype. The proposed topology has been tested for the different types of load and changes in the modulation index. The experimental results have verified the feasibility of the proposed topology.

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“…These converters featured a less number of switches and less number of DC power supplies, which contributes to reduced weight, volume, and cost [17]. Two new switched‐capacitor MLIs have been suggested in [18, 19] that benefit from lower switches. However, a large number of DC power supplies in theme and high TBV on switches in [18] are disadvantages that cause lower efficiency.…”

Section: Introductionmentioning

confidence: 99%

A multilevel inverter using switched capacitors with reduced components

Taheri

Rasulkhani

Ren

2020

IET power electron.

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In this study, a novel multi‐source switched‐capacitor converter is proposed. In the proposed topology, the capacitor charging is carried out in a self‐balancing form eliminating the need for additional balancing circuits. After that, the design principle of the proposed inverter is discussed in details. A comparison study between the proposed topology and other existing topologies is provided next. According to this comparison, the proposed topology requires fewer components, such as DC power supplies, switches, capacitors, and diodes. Further, the simulation results for 15‐level and 127‐level and the experimental results for a 15‐level inverter are provided. The simulation and experimental results are in close agreement and verify each other.

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Improved Switched-Capacitor Integrated Multilevel Inverter With a DC Source String

Cited by 66 publications

References 30 publications

Single‐phase boost DC‐link integrated cascaded multilevel inverter for PV applications

Single‐phase boost DC‐link integrated cascaded multilevel inverter for PV applications

Dual input switched‐capacitor‐based single‐phase hybrid boost multilevel inverter topology with reduced number of components

A multilevel inverter using switched capacitors with reduced components

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