An Active-Neutral-Point-Clamped Switched-Capacitor Multilevel Inverter With Quasi-Resonant Capacitor Charging

Pal, Pradipta Kumar; Jana, Kartick Chandra; Siwakoti, Yam P.; Majumdar, Saikat; Blaabjerg, Frede

doi:10.1109/tpel.2022.3187736

Cited by 35 publications

(10 citation statements)

References 41 publications

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“…It is noticed that the value of F C/L and CF of the anticipated topology is not as much as the recently proposed SCMLI topologies mentioned in Table 4 except the ones in [31,32,35]. However, the gain in [30][31][32][33][34][35] are less than the proposed one. Tis shows the said topology is associated with a smaller number of the driver unit, heat sinks, protection units, etc.…”

Section: Comparative Assessmentmentioning

confidence: 69%

A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count

Jena

Kumar²,

Kumar³

et al. 2023

International Transactions on Electrical Energy Systems

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This paper presents a new single-source switched capacitor- (SC-) based multilevel inverter (MLI) design with a boosting potential of three times the supply voltage. To produce a waveform with seven output voltage levels, the suggested switching capacitor inverter consists of eight switches, single diode, and two capacitors. Because capacitors are inherently balanced, there is no need for a balancing circuit or sensor. The structure can be expanded using the provided generalized equations. In addition, the technique for switching control and loss analyses is explored. A fair comparison with the most recent SCMLI topologies has been conducted to demonstrate the merits of the proposed work. Furthermore, the proposed topology is evaluated using the MATLAB/SIMULINK tool, and experiments under both transient and steady-state situations are performed to demonstrate its feasibility. At dynamic-loaded situations, the performance of the proposed SCMLI with dynamic modulation index and switching frequency is tested.

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Section: Comparative Assessmentmentioning

confidence: 69%

A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count

Jena

Kumar²,

Kumar³

et al. 2023

International Transactions on Electrical Energy Systems

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“…In addition, (FC) and (NPC) MLIs have bulky size of capacitors and they need additional passive components such as diodes. Furthermore, they require complex control circuits to balance the voltage [6,7]. For this reason, alternative MLIs are suggested using reduced isolated DC sources and fewer switch counts.…”

Section: Introductionmentioning

confidence: 99%

A dual source switched-capacitors multilevel inverter topology with extended voltage levels and voltage gain

Al-Tameemi,

Babaei,

Sabahi

2024

Eng. Res. Express

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The switched-capacitors multi-level inverters (SCMLI) are widely used in renewable energy resources for enhancing the quality and reliability of generated power. This paper suggests a new topology of extendable voltage levels and voltage gain units using switched-capacitors SC with a dual dc source. The proposed unit can be extended by a modular pattern to increase the output voltage levels and voltage-boosting gain of the inverter. The main feature of this work is presenting a unit topology that utilizes multiple and modular sub-cells to increase the voltage gain at the output by increasing the number of the sub-cell components. A ternary relationship of the voltage value between the two asymmetrical dc sources is mandatory. Furthermore, all the capacitors are self-balanced, so there is no need for any additional and complex control circuit. Moreover, to decrease the cost factor of the inverter, a low IGBT switch count is taken into consideration and no passive diodes are used in the proposed structure. The H-bridge is connected to the unit to achieve bipolar voltage at the output. The operational analysis of the inverter is delineated in detail. A comparative study with state-of-art MLIs in different terms such as the number of components, the total standing voltage, the cost factor, and the gain show the particularity of the proposed topology. The simulation of the proposed MLI is performed using PSCAD-EMTDC software.

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“…For DC-AC power conversion with built-in selfbalancing capability, a switching capacitor based 5LANPC topology is shown in [9]. But for grid-connected applications, they must have a dc-link voltage that is equivalent to the input voltage, requiring the system to include a front-end boost converter.…”

Section: Introductionmentioning

confidence: 99%

Modified Asymmetrical H-Bridge MLI With Minimum Switching Loss and Harmonic Distortion Using JAYA Algorithm

Mohanty,

Mohanty

2024

IEEE Access

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This paper proposes a modified structure of reduced switch count H-Bridge Multilevel inverter (MLI) which comes with an advantages of higher voltage level, lower switching loss and lower number of components. This developed topology of MLI can generate 15-level output voltage with only three number of DC voltage sources and ten power devices. In order to generate the higher voltage level in analogy to the conventional Multilevel inverter asymmetrical input voltage sources are used which reduced the number of power devices input voltage sources and driver circuits. To mitigate the voltage and current harmonics from the output of the MLI JAYA algorithm is employed. This algorithm resulted 2.5% total harmonic distortion (THD) for three phase system and 5.2% THD for single phase system by developing suitable switching angles with rapid acceleration and reduces the computational burden. The efficacy of the algorithm has been justified by the comparison study with most popular swarm based algorithms known as particle swarm optimization (PSO) and Genetic algorithm (GA). The performance of the reduced MLI has been studied by developing a prototype for single phase and three phase in both MATLAB Simulink environment and experimental setup.

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An Active-Neutral-Point-Clamped Switched-Capacitor Multilevel Inverter With Quasi-Resonant Capacitor Charging

Cited by 35 publications

References 41 publications

A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count

A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count

A dual source switched-capacitors multilevel inverter topology with extended voltage levels and voltage gain

Modified Asymmetrical H-Bridge MLI With Minimum Switching Loss and Harmonic Distortion Using JAYA Algorithm

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