A New Symmetrical Three Phase Multilevel Inverter using Switched Capacitor Basic Units for Renewable Energy Conversion Systems

Saha, Diptish; Roy, Tapas

doi:10.1109/iccpcct.2018.8574248

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…V m sin ω(t 11 + ∆t) = 11 (8) Adding Equations (7) and (8) and after manipulating by trigonometric identities, we get 2V m sin(ωt 11 ) = 21…”

Section: Calculation Of Capacitancementioning

confidence: 99%

“…FC requires a complex control mechanism to ensure that the voltage across the capacitor is maintained constant. Therefore, conventional MLI is not suitable for voltage levels beyond five [8]. A large number of modified/hybrid conventional topologies that were proposed required a large number of power semiconductor switches for the generation of higher voltage levels [9].…”

Section: Introductionmentioning

confidence: 99%

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Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement

et al. 2020

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Conventional multilevel inverter topologies like neutral point clamped (NPC), flying capacitor (FC), and cascade H bridge (CHB) are employed in the industry but require a large number of switches and passive and active components for the generation of a higher number of voltage levels. Consequently, the cost and complexity of the inverter increases. In this work, the basic unit of a switched capacitor topology was generalized utilizing a cascaded H-bridge structure for realizing a switched-capacitor multilevel inverter (SCMLI). The proposed generalized MLI can generate a significant number of output voltage levels with a lower number of components. The operation of symmetric and asymmetric configurations was shown with 13 and 31 level output voltage generation, respectively. Self-capacitor voltage balancing and boosting capability are the key features of the proposed SCMLI structure. The nearest level control modulation scheme was employed for controlling and regulating the output voltage. Based on the longest discharging time, the optimum value of capacitance was also calculated. A generalized formula for the generation of higher voltage levels was also derived. The proposed model was simulated in the MATLAB®/Simulink 2016a environment. Simulation results were validated with the hardware implementation.

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“…V m sin ω(t 11 + ∆t) = 11 (8) Adding Equations (7) and (8) and after manipulating by trigonometric identities, we get 2V m sin(ωt 11 ) = 21…”

Section: Calculation Of Capacitancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement

et al. 2020

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“…Another class of inverters is based on the switched capacitor rule of operation [14][15][16][17][18][19]. These inverters use capacitor units to switch the subsequent states of the inverter.…”

Section: Introductionmentioning

confidence: 99%

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Muc¹,

Iwaszkiewicz²

2023

RE&PQJ

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The paper presents an inverter based on the orthogonal space vectors theory (OVT inverter) and its performance. The OVT inverter consists of two constituent twolevel 3-phase inverters: the main inverter (MI) and the auxiliary one (AI). The MI is controlled in a simple way to generate the stepped output voltage and the AI works as an active filter limiting the higher harmonics in the OVT output voltage. The filtering process is formed by the use of the orthogonal space vector theory. The output voltage of the OVT inverter takes the shape of a stepped voltage comparable to the voltage generated by multilevel inverters. The AI operates as a very effective active power filter (APF) of the OVT inverter output voltage. The AI power is significantly lower in comparison to the MI power nevertheless its switching frequency affects the OVT performance. The article describes studies in which the impact of changes in the switching frequency filter inverter on the operation of the orthogonal inverter and the output voltage THD. Increasing the filter inverter switching frequency improved performance and reduced the transformer size, which acts as a summing node.

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Review of multiport modular multilevel converters for residential applications: A control perspective

Adams

Séra

Walker

et al. 2023

IET Power Electronics

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Distributed generation and storage systems have become important in the residential building environment. One of the more promising power electronic interfaces between these systems and the grid/building are multiport modular multilevel converters (MPMMCs). These converters can potentially improve efficiency and flexibility, however their control can pose challenges. Here, MPMMC topologies will be reviewed and analysed from a control standpoint (i.e. what control structures they require and what control outcomes they can achieve). This paper first determines a criteria for selecting a MPMMC for a residential building. It then presents a set of review criteria that can be used as guide for future multiport multilevel modular converters. It then applies these review criteria to analyse the converters that passed the selection criteria. Based on a detailed comparison of these topologies an appropriate multiport modular multilevel solution can be arrived at for a given application.

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A New Symmetrical Three Phase Multilevel Inverter using Switched Capacitor Basic Units for Renewable Energy Conversion Systems

Cited by 5 publications

References 13 publications

Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement

Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Review of multiport modular multilevel converters for residential applications: A control perspective

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