Space-Vector-Modulated Method for Boosting and Neutral Voltage Balancing in Z-Source Three-Level T-Type Inverter

Xing, Xiangyang; Zhang, Chenghui; Chen, Alian; He, Jinwei; Wang, Weisheng; Du, Chunlei

doi:10.1109/tia.2015.2490142

Cited by 43 publications

(56 citation statements)

References 26 publications

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“…Therefore, besides the full shoot-through (FST) state previously mentioned, two new switching states emerge for three-level inverters: upper shoot-through (UST) and lower shoot-through (LST). These states were defined in [29]; the idea was applied to a 3L-NPC Z-source inverter [19], to a 3L-NPC-quasi-Z-source inverter [30], and to a 3L-T-type Z-source inverter [20]. Moreover, literature pieces dealing with the concept of UST/LST states have all used the modulation-based SVM technique.…”

Section: Introductionmentioning

confidence: 99%

“…A space vector modulation (SVM) method of a 3L-NPC Z-source inverter was developed in [19]. In [20], the switching sequence was modified to balance neutral-point potential. A new SVM applied to a single-phase, 3L-NPC Z-source inverter with a reduced number of conversions, higher performance, and equally distributed switch losses among transistors was recently proposed in [21].…”

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confidence: 99%

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Improvements on the Carrier-Based Control Method for a Three-Level T-Type, Quasi-Impedance-Source Inverter

et al. 2019

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The boost feature that characterizes Z-source and quasi-Z-source converters is usually achieved by means of a proper insertion of short-circuit states in the full DC-link. In this work, a novel pulse width modulation carrier-based strategy for a three-phase, three-level T-type, quasi-Z-source inverter is introduced, based on the addition of alternate short-circuits in the two halves of the DC-link bus. This technique achieves better performance, less electromagnetic interference, and lower harmonic distortion of the output line-to-line voltage compared to the traditional methods based on the full DC-link shoot-through. At the same time, generating the switching states is to easy implement. The proposed strategy permits the use of electronic devices with lower blocking voltage capability, thus improving converter reliability, size, and cost. The new method may be implemented in another multilevel inverter with an impedance-source network as well. A comprehensive simulation study is performed in order to validate the adopted method, with different inverter input voltages, which is taken as representative of a photovoltaic array. Comparisons are conducted with conventional strategy insertions using the same topology in order to show the improvements achieved.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Improvements on the Carrier-Based Control Method for a Three-Level T-Type, Quasi-Impedance-Source Inverter

et al. 2019

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“…Various NP potential balancing methods were proposed for conventional NPC inverters [10][11][12][13][14][15][16][17], most of them alter redundant small vector durations so that the average neutral wire current becomes zero and thus the NP potential is balanced. In [18], a space vector modulated NP potential balancing method is proposed for Z-source three-level Ttype inverter. However, it is not suitable for the SL Zsource three-level inverter.…”

Section: Introductionmentioning

confidence: 99%

Neutral-point Potential Balancing Method for Switched-Inductor Z-Source Three-level Inverter

Wang¹,

Zhang²

2017

Journal of Electrical Engineering and Technology

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-Switched-inductor (SL) Z-source three-level inverter is a novel high power topology. The SL based impedance network can boost the input dc voltage to a higher value than the single LC impedance network. However, as all the neutral-point-clamped (NPC) inverters, the SL Z-source threelevel inverter has to balance the neutral-point (NP) potential too. The principle of the inverter is introduced and then the effects of NP potential unbalance are analyzed. A NP balancing method is proposed. Other than the methods for conventional NPC inverter without Z-source impedance network, the upper and lower shoot-through durations are corrected by the feedforward compensation factors. With the proposed method, the NP potential is balanced and the voltage boosting ability of the Z-source network is not affected obviously. Simulations are conducted to verify the proposed method.

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“…This study does not have a voltage boosting stage in cascaded topology. In the same way, the SVPWM technique proposed in [23] can balance neutral point voltage in a low voltage T-type NPC inverter. It generates nonsymmetrical shoot-through states to deal with input voltage variations.…”

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confidence: 97%

A quasi-Z-source active neutral point clamped inverter topology employingsymmetrical/unsymmetrical boost modulation control scheme for renewableenergy resources

Majeed¹,

Saleem²,

Hussain³

et al. 2019

Turk J Elec Eng & Comp Sci

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This paper proposes a bipolar quasi-Z-source active neutral point clamped inverter (QZS-ANPCI) topology. It acts as a buck/boost inverter (3-phase, 3-level) to integrate renewable energy resources under their fluctuating DC voltages. We propose a symmetrical/unsymmetrical boost modulation control technique to mitigate the DC-link unbalance voltage problem in an ANPC inverter. This worthwhile control technique exploits voltage-current closedloops on AC and DC sides to regulate the desired parameters. Moreover, the constant boost control (CBC) modulation has provided a switching sequence that generates a symmetrical/unsymmetrical full shoot-through (FST) state for boosting input DC voltage in the proposed inverter. Detailed loss and efficiency analysis is carried out to show its superior performance under the proposed scheme. Furthermore, the total harmonic distortion (THD) of the proposed QZS-ANPCI meets IEEE Standard-519. Simulink/MATLAB (MathWorks, USA) and PSIM (Powersim, USA) software programs are used to simulate the proposed topology. To verify the theoretical proposals and simulation results, we have developed an experimental prototype setup (1 kW). Both simulation results and experimental data show satisfactory agreement and support the theoretical postulates. Key words: Z-source inverter, quasi-z-source inverter, buck/boost inverter, neutral point clamped inverter, active neutral point clamped inverter 1. Introduction Renewable energy resources (RERs) are penetrating into electrical power systems. This trend is due to the rising inevitable problems of global warming. The main reason is the excessive consumption of fossil fuel for energy generation. Over the years, several RERs such as solar, wind, hybrid solar-gas, and biomass resources have been explored and developed for alternative power generation [1]. Power conditioning converters are mandatory to interface RERs with utility grid systems. Therefore, the voltage-fed inverter (VFI) and the current-fed inverter (CFI) are two main conventional power inverters that synchronize these resources with interconnected utility grids. These converters do not have the boost ability during low DC input voltage. Instead, they require separate DC-DC boost converters at their input stage. The Z-source inverter (ZSI) [2], developed in 2003, has a built-in buck/boost characteristic to overcome the above problems. The ZSI exploits unipolar X-shaped impedance (Z) * Correspondence: rehan_majeed2008@yahoo.com This work is licensed under a Creative Commons Attribution 4.0 International License.integrated with the conventional inverter. It contains capacitors (C) and inductors (L) as passive components.Due to its inherent characteristics, classical converters, such as DC-DC, AC-DC, DC-AC, and AC-AC, can have buck/boost ability working together with the same impedance [3].An improved form of the ZSI is the QZSI to overcome its problems. There are four distinct QZSI topologies for RERs. These topologies have various advantages, such as a continuous input current, lower componen...

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Space-Vector-Modulated Method for Boosting and Neutral Voltage Balancing in Z-Source Three-Level T-Type Inverter

Cited by 43 publications

References 26 publications

Improvements on the Carrier-Based Control Method for a Three-Level T-Type, Quasi-Impedance-Source Inverter

Improvements on the Carrier-Based Control Method for a Three-Level T-Type, Quasi-Impedance-Source Inverter

Neutral-point Potential Balancing Method for Switched-Inductor Z-Source Three-level Inverter

A quasi-Z-source active neutral point clamped inverter topology employingsymmetrical/unsymmetrical boost modulation control scheme for renewableenergy resources

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