SiC‐based active quasi‐Z‐source inverter with improved PWM control strategy

Duong, Truong-Duy; Nguyen, Minh-Khai; Lim, Young‐Cheol; Choi, Joon-Ho; Vilathgamuwa, D.M.

doi:10.1049/iet-pel.2019.0323

Cited by 18 publications

(12 citation statements)

References 29 publications

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“…where ΔIL is the inductor ripple current. From (16) and (17), it can be seen that the total of inductances L1 and L2 is equal to the inductor in qSB-network of the 2S-qSBI.…”

Section: V3-vst-v2-v1-vst-v6-vst-v1-v2-vst-v3 Vst-v3-v2-v1-v6-vst-v6-mentioning

confidence: 99%

“…To verify the characteristic of the proposed AZST-SVMs for M2S-qSBI, the power loss analysis is also determined. The power losses of the power switches, diodes, inductors, and capacitor are calculated as presented in [13], [16]. Because the conducting time and conducting current of the proposed AZST-SVM4 are the same as the proposed AZST-SVM2, only the switching loss of the semiconductor devices is presented in this section to perform the power loss analysis.…”

Section: Switching Loss Analysismentioning

confidence: 99%

“…However, when a wider input voltage range is needed for a PV system related to the buck voltage ability or a low voltage boost requirement, the embedded qSBI cannot respond well, as presented in [13]- [14]. In order to overcome this limitation, an active qSBI has been proposed by combining the qZS and qSB topologies [15]- [16]. However, many components are required in these Z-networks, which leads to reduce efficiency and increase cost.…”

Section: Introductionmentioning

confidence: 99%

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Modulation Techniques for a Modified Three-Phase Quasi-Switched Boost Inverter With Common-Mode Voltage Reduction

et al. 2020

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In a single-stage buck-boost quasi-switched boost inverter (qSBI), the shoot-through state insertion causes high amplitude common-mode voltage. Consequently, the qSBI becomes less attractive in transformerless photovoltaic (PV) systems. In this paper, a novel space vector pulse-width modulation for a modified qSBI is introduced to reduce the magnitude of common-mode voltage and push the modulation index up to 1. By properly choosing the shoot-through interval time, shoot-through states are considered to be inserted for boosting voltage and also reducing the THD value of the output voltage. The mathematical analysis and operating principles of the converter are discussed and verified through PSIM simulations. Finally, an experimental prototype is validated based on a TMS320F28335 DSP microcontroller and a DE0-Nano FPGA digital control platform. INDEX TERMS Z-source inverter, quasi-switched boost inverter, single-stage inverter, common-mode voltage, transformerless PV system, space vector pulse-width modulation.

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“…where ΔIL is the inductor ripple current. From (16) and (17), it can be seen that the total of inductances L1 and L2 is equal to the inductor in qSB-network of the 2S-qSBI.…”

Section: V3-vst-v2-v1-vst-v6-vst-v1-v2-vst-v3 Vst-v3-v2-v1-v6-vst-v6-mentioning

confidence: 99%

Section: Switching Loss Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modulation Techniques for a Modified Three-Phase Quasi-Switched Boost Inverter With Common-Mode Voltage Reduction

et al. 2020

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“…In this respect, comparisons of the control method parameters are also seen [65]. The PWM methods are needed for the operation of the QZS inverters and converters [66]- [68]. The SVPWM and MBPWM shoot-through control methods have the highest maximum shoot-through ratios and voltage stresses.…”

Section: Mathematical Model Of the Qzs Invertermentioning

confidence: 99%

A Review of Control Methods on Suppression of 2ω Ripple for Single-Phase Quasi-Z-Source Inverter

2020

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One of the disadvantages of the charging systems and voltage regulation systems in alternative energy systems is that when the direct current (DC)/alternative current (AC) or AC/DC conversion is made from the energy source, the energy flow at 2ω frequency between the direct current side and the alternative current side causes ripples in the DC, inductors, and capacitors. The ripples that occur in 2ω frequency increase the harmonic distortion and reduce the efficiency in the photovoltaic energy system. For addressing this problem, different control methods are evaluated in this paper for the elimination of ripples that occur at 2ω frequency, both on the perspective of DC control side and AC control side with a thorough comparative analysis with existing results in the literature. In the present study, the model of Single-Phase Quasi-Z Source (QZS) inverter and closed-loop control methods of the inverter are examined and compared with pulse width modulation (PWM) methods. In addition, the control methods are used to eliminate the ripples at 2ω frequency in the use of inverters, and the advantages and disadvantages of these methods are presented. INDEX TERMS QZS inverter, suppression of 2ω ripple, control methods, pulse width modulation. I. INTRODUCTION

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“…1 a ). This architecture enables the shoot‐through state, which facilitates both buck and boost features without the necessity for any additional costs or delays [6]. Moreover, it behaves as a filter to suppress voltage ripples and diminish inrush currents and harmonics [7].…”

Section: Introductionmentioning

confidence: 99%

LMI‐based robust controller design and implementation for Z‐source inverters

Ahmadi

Mohammadi

Mohammadi‐Ivatloo

et al. 2020

IET power electron.

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In this study, robust control of impedance source inverters in the presence of uncertainties such as parameters perturbation, unmodelled dynamics and load disturbances, is addressed. These uncertainties, which are naturally available in any power system, have a profound impact on the performance of power inverters and may lead to performance degradation or even instability of the system. A novel LMI‐based design procedure is presented to guarantee the stability of the inverter subject to uncertainties in a Lyapunov‐based framework while a certain level of disturbance rejection is satisfied. Simulation results demonstrate the superior performance of the presented method against comparative controllers. Finally, the proposed controller is applied to an experimental system and the results are compared with simulations, where both substantiate the potency of the proposed controller.

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SiC‐based active quasi‐Z‐source inverter with improved PWM control strategy

Cited by 18 publications

References 29 publications

Modulation Techniques for a Modified Three-Phase Quasi-Switched Boost Inverter With Common-Mode Voltage Reduction

Modulation Techniques for a Modified Three-Phase Quasi-Switched Boost Inverter With Common-Mode Voltage Reduction

A Review of Control Methods on Suppression of 2ω Ripple for Single-Phase Quasi-Z-Source Inverter

LMI‐based robust controller design and implementation for Z‐source inverters

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