Topology and Modulation Scheme for Three-Phase Three-Level Modified Z-Source Neutral-Point-Clamped Inverter

Ho, Anh-Vu; Chun, Tae-Won

doi:10.1109/tpel.2019.2901962

Cited by 29 publications

(20 citation statements)

References 35 publications

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“…The AEMZS-3LTI topology shown in Fig. 1(a) is designed by combining the MZS network [32], [33] and 3LTI, and placing a single dc source in series with the inductor L 1 of the upper cell in the impedance network [34]. The SEMZS-3LTI topology shown in Fig.…”

Section: Operation Analysis Of Asymmetical and Symmetrical Emzs-3mentioning

confidence: 99%

“…xo (x = a, b, or c) and the turn-on switching devices and diodes according to the operating states of the two proposed topologies. [31], and combining the impedance network and NPC inverter named MZS-NPC inverter [33]. Fig.…”

Section: Operation Of Two Topologies Without the Shoot-through Statementioning

confidence: 99%

“…In this paper, three-phase embedded modified-Z-source three-level T-type inverter topologies are proposed. The proposed topologies are designed by attaching the single modified-Z-source (MZS) impedance network proposed in [32], [33] to 3LTI, and embedding either one or two dc sources at the MZS network, which are named asymmetrical embedded MZS-3LTI (AEMZS-3LTI) and symmetrical embedded MZS-3LTI (SEMZS-3LTI), respectively. They can improve the boost ability and ensure a continuous dc source current without an extra capacitor or filter by employing the embedded concept.…”

Section: Introductionmentioning

confidence: 99%

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Three-Phase Embedded Modified-Z-Source Three-Level T-Type Inverters

Huynh

Chun

2020

IEEE Access

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Two topologies are designed by combining a modified-Z-source (MZS) network consisting of three diodes, two inductors and four capacitors to a traditional three-level T-type inverter (3LTI), and embedding either one or two dc sources in the impedance network, which are named as asymmetrical embedded MZS-3LTI (AEMZS-3LTI) and symmetrical embedded MZS-3LTI (SEMZS-3LTI). The proposed topologies provide a highly boosted ac output voltage with five voltage levels and ensure a continuous dc source current by adopting the embedded concept. Operating analysis is performed and a comparison of the two proposed topologies with five different topologies combining the impedance network and 3LTI or neutral-point-clamped (NPC) inverter is provided. A novel modulation technique is proposed for effectively controlling the upper and lower shoot-through states with a simple logic circuit and balancing a neutral-point voltage. The validity of the proposed topologies and the modulation technique is demonstrated through simulation and experimental results.

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Section: Operation Analysis Of Asymmetical and Symmetrical Emzs-3mentioning

confidence: 99%

Section: Operation Of Two Topologies Without the Shoot-through Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-Phase Embedded Modified-Z-Source Three-Level T-Type Inverters

Huynh

Chun

2020

IEEE Access

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“…To overcome these limits, the inverter based on Z-source (ZS) topology was explored in [4]. By using one more diode, two additional inductors, and two additional capacitors, this topology is known as a single-state converter with a buck-boost capability and ST immunity.…”

Section: Introductionmentioning

confidence: 99%

A Three-Level DC-Link Quasi-Switch Boost T-Type Inverter with Voltage Stress Reduction

Tran

et al. 2020

Energies

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In recent years, the three-level T-Type inverter has been considered the best choice for many low and medium power applications. Nevertheless, this topology is known as a buck converter. Therefore, in this paper, a new topology incorporating the dc-link type quasi-switched boost network with the traditional three-level T-type inverter is proposed to overcome the limit of traditional three-level T-Type inverter. The space vector pulse width modulation scheme is considered to control this topology, which provides some benefits such as enhancing modulation index and reducing the magnitude of common-mode voltage. For this scheme, the zero, medium, and large vectors are utilized to generate the output voltage. The shoot-through state which is adopted by turning on all power switches of inverter leg is inserted into zero vector to boost the dc-link voltage. As a result, there is no distortion at the output waveform. The control signal of intermediate network power switches is also detailed to improve the boost factor and voltage gain. As a result, the voltage stress on power devices like capacitors, diodes, and switches is decreased significantly. To demonstrate the outstanding of proposed structure and its control strategy, some comparisons between the proposed method and other ones are performed. Simulation and experimental prototype results are conducted to verify the accuracy of the theory and effectiveness of the inverter.

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“…The conventional phase‐opposite disposition (POD) and in‐phase disposition (IPD) modulation schemes do not provide ST and are not suited for impedance source inverters [13]. A 3L modified Z ‐source NPC inverter was used for RES with closed‐loop control in islanded mode [14]. These ZSI topologies result in the discontinuous input current during the boost control, thereby negatively influencing the source.…”

Section: Introductionmentioning

confidence: 99%

Investigation of three‐level NPC‐q Z S inverter‐based grid‐connected renewable energy system

Singh

Jain

2020

IET Power Electronics

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The neutral point clamped quasi-Z-source (NPC-qZS) inverter is poised to become a potential candidate for renewable energy applications because it yields a continuous input current and voltage boost. In this study, the closed-loop control of grid-tied three-phase (3-ϕ) NPC-qZS inverter, fed with renewable energy sources, is proposed for the first time. A dynamic model has been developed to accurately design the control strategy. The proposed strategy includes the control of grid-tied current and the peak dc-link voltage (PDV). The control of grid-tied current is achieved through a damped-secondorder-generalised integrator. The PDV is estimated indirectly from the voltages of qZS network capacitors and is regulated by an integral-double-lead controller. Two modified modulation techniques based on phase-opposite disposition and in-phase disposition are proposed to yield shoot through by injecting 3rd harmonics for maximum constant boost control. A comparison is drawn between the performance of the proposed controller and sliding-mode controller on the dc side. The controller design and system performance are validated through real-time simulation and experimentation on a practical setup in the laboratory.

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Topology and Modulation Scheme for Three-Phase Three-Level Modified Z-Source Neutral-Point-Clamped Inverter

Cited by 29 publications

References 35 publications

Three-Phase Embedded Modified-Z-Source Three-Level T-Type Inverters

Three-Phase Embedded Modified-Z-Source Three-Level T-Type Inverters

A Three-Level DC-Link Quasi-Switch Boost T-Type Inverter with Voltage Stress Reduction

Investigation of three‐level NPC‐q Z S inverter‐based grid‐connected renewable energy system

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