LCCT‐derived three‐level three‐phase inverters

Shults, Tatiana E.; Husev, Oleksandr; Blaabjerg, Frede; Zaķis, Jānis; Khandakji, Kamal

doi:10.1049/iet-pel.2016.0023

Cited by 21 publications

(5 citation statements)

References 33 publications

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“…LCCT networks ( Figure 1f) have quite similar features [48]. At the same time, many derivative circuits and types of converters are proposed in [49][50][51][52][53]. Finally, the A-source network ( Figure 1e) was one of the latest solutions proposed and will be compared as well [54,55].…”

Section: Brief Overview Of Is Derived Convertersmentioning

confidence: 99%

Comprehensive Comparative Analysis of Impedance-Source Networks for DC and AC Application

et al. 2019

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This paper presents a comprehensive analytical comparison of the impedance-source-based dc-dc and dc-ac converters in terms of the passive component count and size, semiconductor stress, and range of input voltage variation. The conventional solution with a boost converter was considered as a reference value. The main criterion of the comprehensive comparison was the energy stored in the passive elements, which was considered both under a constant and predefined high frequency current ripple in the inductors and the voltage ripple across the capacitors. Main impedance-source converters with or without a transformer and with or without inductor coupling were analyzed. Dc-dc and dc-ac applications were considered. Selective simulation results along with experimental verification are shown. The conclusions provide a selection guide of impedance-source networks for different applications taking into account its advantages and disadvantages.

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Section: Brief Overview Of Is Derived Convertersmentioning

confidence: 99%

Comprehensive Comparative Analysis of Impedance-Source Networks for DC and AC Application

et al. 2019

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“…In recent years, researchers have explored various aspects of buck-boost three-level inverters (BBTLIs) related to topologies and PWM control techniques [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18]. Depending on the type of IN, these inverters can be classified into two categories: active IN (AIN) and passive IN (PIN) structures.…”

Section: Introductionmentioning

confidence: 99%

“…1(e) and is another variant of MZSI in which the DC source has been placed in the IN to make the source current continuous. Some PINs with a transformer in them have been reported as LCCT-derived inverters [16]. The turns-ratio of the transformer decides the boost factor of these topologies.…”

Section: Introductionmentioning

confidence: 99%

Active Impedance Network Buck-Boost Three-Level T-Type Inverter With Enhanced Voltage Gain

Singh

Lee

Ho³

2023

IEEE Access

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This paper proposes a new PWM technique for a reduced-component-count active impedance network (RCC-AIN) three-level inverter to maximize the input/output (I/O) voltage gain. Although the max boost control (MBC) technique offers the same I/O voltage gain, it suffers from the drawback of lowfrequency (LF) ripples of the source current. In contrast, the proposed PWM technique is a combination of improved MBC (IMBC) and a new switching state pattern that eliminates this drawback and offers up to 79% reduction in the peak-to-peak ripple value of the source current while maintaining the same I/O voltage gain as MBC. The cumulative sum of ripple components is used to find the exact maximum and minimum peaks of the source current over the fundamental period. The proposed switching pattern doubles the switching frequency of a boosting switch to limit the current spikes of capacitors during state changeover. The RCC-AIN topology was analyzed in various voltage-boosting techniques, and the proposed PWM technique utilizes the full potential of the RCC-AIN topology in a better way. The findings have been verified using theoretical calculations, simulation, and experimental results.

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“…1c shows how to use the LCCT Z-source network [31] for 3L application. A more detailed topological deviation of 3L LCCT solutions is addressed in [32]. Fig.…”

Section: Introductionmentioning

confidence: 99%

A Simple Space Vector Modulation Method With DC-Link Voltage Balancing and Reduced Common-Mode Voltage Strategy for a Three-Level T-Type Quasi-Z Source Inverter

et al. 2021

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Single-stage converters based on an impedance source (IS) network merged with a multilevel inverter remain a trending research topic, from both the topological and control perspectives, because of their potential in applications involving renewable energy. This paper presents a new, simplified space vector pulse-width modulation (SVPWM) for a three-phase three-level T-type quasi-impedance source inverter (3L-T-type qZSI). The benefits of the proposed modulation strategy include functionalities, such as boosting the input voltage and controlling the neutral-point (NP) voltage using the redundant small vectors, to mitigate the inner capacitors voltages imbalance. The proposed SVPWM guarantees a minimum commonmode voltage while preserving a very simple implementation, thus reducing the complex computations and cascaded proportional-integral (PI) control loops of the conventional SVPWM methods. The proposed algorithm can be applied to different multilevel inverter configurations combined with an IS network. A comprehensive simulation study and experimental results demonstrated the good performance of the proposed control method for dynamic response and imbalance conditions.

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LCCT‐derived three‐level three‐phase inverters

Cited by 21 publications

References 33 publications

Comprehensive Comparative Analysis of Impedance-Source Networks for DC and AC Application

Comprehensive Comparative Analysis of Impedance-Source Networks for DC and AC Application

Active Impedance Network Buck-Boost Three-Level T-Type Inverter With Enhanced Voltage Gain

A Simple Space Vector Modulation Method With DC-Link Voltage Balancing and Reduced Common-Mode Voltage Strategy for a Three-Level T-Type Quasi-Z Source Inverter

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