Multisource Switched Capacitor Based Boost Multilevel Inverter for Photovoltaic-Based Systems

Ramaiah, Satish; Lakshminarasamma, N; Mishra, Mahesh K.

doi:10.1109/tpel.2019.2924649

Cited by 37 publications

(19 citation statements)

References 35 publications

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“…The comparison of the amount of the total blocking voltage in switches is shown in Fig. 6 d Accordingly, the proposed topology has a lower amount of TBV than the topologies presented in [11–13, 15, 26]. However, the difference between the proposed topology and topologies of [10, 16, 19, 24] is small.…”

Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 88%

“…As shown in Fig. 6 b , the number of switches in the proposed topology is lower than the topologies of [9, 12, 14, 15, 17, 19, 21–24, 26]. However, the topologies of [12, 13, 26] used a lower number of switches.…”

Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 94%

“…As per Table 3, the proposed SCMLI2 needs a lower number of switches compared to [26]. The number of DC sources in proposed SCMLI2 is less than of topologies suggested in [25].…”

Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 95%

“…However, a large number of switches in [22–24] and numerous DC power supplies and capacitors in [25] are shortcomings. A new asymmetric multi‐source switched‐capacitor converter has been proposed in [26] that uses a smaller number of switches and DC power supplies. However, a high amount of TBV on switches is the shortcoming of it.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 88%

Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 94%

“…As per Table 3, the proposed SCMLI2 needs a lower number of switches compared to [26]. The number of DC sources in proposed SCMLI2 is less than of topologies suggested in [25].…”

Section: Comparison Of the Proposed Scmlis With Other Topologiesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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A multilevel inverter using switched capacitors with reduced components

Taheri

Rasulkhani

Ren

2020

IET power electron.

View full text Add to dashboard Cite

show abstract

“…SC-based multilevel inverters (SCMLI) are being addressed to increase the number of levels, decrease THD and increase the total power that this type of device can handle. New configurations of SCMLIs were suggested in the literature [63][64][65]. Another type of common-ground based inverter is the one that uses floating capacitors.…”

Section: Common-grounded Invertermentioning

confidence: 99%

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

et al. 2020

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The rise in renewable energy has increased the use of DC/AC converters, which transform the direct current to alternating current. These devices, generally called inverters, are mainly used as an interface between clean energy and the grid. It is estimated that 21% of the global electricity generation capacity from renewable sources is supplied by photovoltaic systems. In these systems, a transformer to ensure grid isolation is used. Nevertheless, the transformer makes the system expensive, heavy, bulky and reduces its efficiency. Therefore, transformerless schemes are used to eliminate the mentioned disadvantages. One of the main drawbacks of transformerless topologies is the presence of a leakage current between the physical earth of the grid and the parasitic capacitances of the photovoltaic module terminals. The leakage current depends on the value of the parasitic capacitances of the panel and the common-mode voltage. At the same time, the common-mode voltage depends on the modulation strategy used. Therefore, by the manipulation of the modulation technique, is accomplished a decrease in the leakage current. However, the connection standards for photovoltaic inverters establish a maximum total harmonic distortion of 5%. In this paper an analysis of the common-mode voltage and its influence on the value of the leakage current is described. The main topologies and strategies used to reduce the leakage current in transformerless schemes are summarized, highlighting advantages and disadvantages and establishing points of comparison with similar topologies. A comparative table with the most important aspects of each converter is shown based on number of components, modes of operation, type of modulation strategy used, and the leakage current value obtained. It is important to mention that analyzed topologies present a variation of the leakage current between 0 to 180 mA. Finally, the trends, problems, and researches on transformerless grid-connected PV systems are discussed.

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Recent trends and review onswitched‐capacitor‐basedsingle‐stageboost multilevel inverter

Kumari

Siddique

Sarwar

et al. 2021

Int Trans Electr Energ Syst

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Summary Multilevel inverters are very popular in renewable energy applications. These inverters produce output voltages close to sinusoidal and have lower harmonics as compared to the conventional two‐level inverters as it also helps in reducing the size of the filter, thus makes the circuitry less complicated. In conventional multilevel inverter topologies, the number of devices increases with the increase of the number of output voltage levels, which in turn makes circuitry bulky and costly. Further, the boosting feature of the input voltage is also necessary for the application of multilevel inverters with renewable energy. Therefore, to reduce the count of devices, losses, and rating of devices, various switched‐capacitor multilevel inverter topologies are proposed. Switched‐capacitor multilevel inverter topologies (SCMLIs) can generate multiple voltage levels along with high voltage gain with a minimum number of devices. This paper gives a detailed overview of the recently introduced SCMLIs. The different SCMLIs have been categorized based on the number of levels and voltage gains. A detailed comparison has been introduced in this paper. Finally, few SCMLI topologies have been experimentally validated using the experimental results.

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Multisource Switched Capacitor Based Boost Multilevel Inverter for Photovoltaic-Based Systems

Cited by 37 publications

References 35 publications

A multilevel inverter using switched capacitors with reduced components

A multilevel inverter using switched capacitors with reduced components

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

Recent trends and review onswitched‐capacitor‐basedsingle‐stageboost multilevel inverter

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