Study and Analysis of a Novel Three-Phase Hybrid Cascaded Multilevel Inverter with Less Number of Power Electronic Switches

Hassanifar, Mahyar; Choupan, Reza; Nazarpour, Daryoush; Neyshabouri, Yousef; Golshannavaz, Sajjad

doi:10.23919/eleco47770.2019.8990561

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…It is characterized by its modularity and simplicity in control and operation, which does not suffer from voltage balancing problems. Despite the fact that the CHB MLI requires fewer components than other traditional topologies, the number of components remains considerable at higher voltage levels [7][8][9]. The conduction and switching losses increase as the number of switches increases, which will reduce efficiency.…”

Section: Introductionmentioning

confidence: 99%

Hybrid cascaded MLI development for PV‐grid connection applications

Noman

Al-Shamma’a

Asef

et al. 2022

IET Power Electronics

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For grid‐connected solar photovoltaic (PV) applications, a hybrid cascaded MLI (H‐CMLI) topology based on cascaded H‐bridge MLI is proposed in this study. The proposed configuration is a hybrid of two common MLIs: Cascaded H‐bridge and three‐phase cascaded voltage source inverter (VSI). For the same voltage level, the proposed topology enhances the number of the generated voltage levels while employing fewer components, relative to other traditional MLI topologies. Furthermore, the voltage stresses on switches in the proposed topology are decreased, compared to when each part operates independently. The proposed topology could be utilized for many applications, such as PV‐grid connection, active power filters, and STATCOM. To verify the effectiveness of the proposed topology, the model is developed in MATLAB/Simulink environment, in which a closed‐loop control scheme based on the traditional one is used to achieve the PV‐grid connection. Alongside the simulation results, the proposed topology and its control scheme are experimentally implemented in the laboratory. Two cases were experimentally applied to validate the successful performance of the proposed H‐CMLI: Open‐loop control and closed‐loop control for PV‐grid integration. The proposed control scheme effectively maintains the DC link voltage at its reference voltages. Also, the closed‐loop control scheme is capable of providing the power factor at unity and maintaining the total harmonic distortion (THD) of grid current within the acceptable limit. To demonstrate the proposed topology's functionality and viability, experimental results are provided.

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Section: Introductionmentioning

confidence: 99%

Hybrid cascaded MLI development for PV‐grid connection applications

Noman

Al-Shamma’a

Asef

et al. 2022

IET Power Electronics

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“…Particularly a complicated control system is employed to balance the capacitor voltage that adds circuit volume and complexity. [4][5][6][7][8] Three popular types of classical multilevel inverters (MLIs) are 10,11 : • Neutral point clamped (NPC) • Flying capacitor (FC)…”

Section: Introductionmentioning

confidence: 99%

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

Sabour

Nazarpour

Golshannavaz

et al. 2020

Int Trans Electr Energ Syst

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Summary This paper presents a new structure for a quasi‐resonant switched capacitor multilevel inverter. This structure offers multiple features of the conventional multilevel structures. Moreover, regarding the provided output voltage levels, the proposed structure exploits a new quasi‐resonant basic module which helps to diminish circuit cost and complexity using fewer power components. In the proposed structure, the balancing of capacitors voltages is achieved by series and parallel connection with the voltage source and without the need to employ a complicated control system. In order to obtain higher voltage levels at the inverter ac side, a developed H‐bridge is used in which the basic module is extended horizontally in separate cells on either side. Through a quasi‐resonant inductor deployment in the basic module, current spikes of capacitors are filtered which overwhelms decreasing of capacitor value and also lengthening the capacitor lifetime besides decreasing electromagnetic interference (EMI). Coupled with extensive simulation studies, experimental analyses are conducted to validate the performance of the proposed 17‐level inverter.

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“…Compared to the classical two‐level inverters, the MLIs possess many superiorities, such as the ability to produce a higher voltage using low‐voltage power components, reducing voltage stress across the switches, reducing the output voltage THD and the AC side filter size, and decreasing electromagnetic interferences (EMI) [4–6]. Three basic structures for the classic MLIs [7–9] are: Neutral point clamp (NPC) Flying capacitors (FC) Cascaded H‐bridge (CHB) In NPC, the input DC voltage is divided among multiple capacitors and the clamping diodes are utilised for the generation of voltage levels. Generally, the NPC has been employed in three or five‐levels types due to the simple control scheme and structure.…”

Section: Introductionmentioning

confidence: 99%

Voltage source boost multilevel inverter with high modularity: circuit configuration and modulation

Sabour

Hassanifar

Choupan

et al. 2020

IET power electron.

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This study introduces a boost multilevel inverter (MLI) based on a switched capacitor structure. The proposed inverter features high modularity as a result of which more levels and ratings of voltage can be obtained in the inverter AC terminals. The extension of this topology in both symmetric and asymmetric configurations are introduced and analysed. Taking advantage of the switched‐capacitor technique, only one DC source is utilised while the voltages of several capacitors are kept balanced without the adoption of any sophisticated balancing algorithm. A combination of two basic submodules named as boost switched capacitor submodule and dual switched capacitor submodule forms the proposed structure. Compared to the existing alternatives, the proposed one provides more voltage levels with a lower number of power switches and input DC sources. The performance of the presented MLI is verified through the MATLAB/Simulink environment. Finally, the experimental results are presented, validating the feasibility and effectiveness of the studied inverter.

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Study and Analysis of a Novel Three-Phase Hybrid Cascaded Multilevel Inverter with Less Number of Power Electronic Switches

Cited by 6 publications

References 15 publications

Hybrid cascaded MLI development for PV‐grid connection applications

Hybrid cascaded MLI development for PV‐grid connection applications

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

Voltage source boost multilevel inverter with high modularity: circuit configuration and modulation

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