Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

Shults, Tatiana E.; Husev, Oleksandr; Blaabjerg, Frede; Roncero‐Clemente, Carlos; Romero‐Cadaval, Enrique; Vinnikov, Dmitri

doi:10.1109/tpel.2018.2859194

Cited by 37 publications

(22 citation statements)

References 45 publications

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“…Another advantage of the qZS converter is the lower peak current of the transformer. The normalized value of the transformer peak current in the qZS converter can be calculated as follows: (13) Similar to that, it can be shown that the peak transformer current of the CS converter is double of the average input current: (14) Dependences (13) and (14) are compared in Figure 13. It can be appreciated from the figure that the qZS converter features up to a 70% lower transformer peak current, while the normalized transformer peak current of the CS converter is constant.…”

Section: Shmentioning

confidence: 94%

“…The calculation of the inductance value is exemplified in many papers [1,8,14,26,33]. The input power level, input voltage range, and the predefined input current ripple are completely sufficient to define the parameters of the magnetic components.…”

Section: Comparative Analysis Approachmentioning

confidence: 99%

“…Many papers have studied in detail possibilities for such applications [5][6][7]. Steady-state analysis and dynamic analysis along with different control strategies have been described in detail [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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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: Shmentioning

confidence: 94%

Section: Comparative Analysis Approachmentioning

confidence: 99%

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

et al. 2019

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“…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]. Reference [22] proposed an SVM scheme for a 3L-T-type quasi-Z-source inverter with the aim of reducing the value and slew rate of common-mode voltage.…”

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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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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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“…Z-source inverters (ZSIs) and quasi-Z-source inverters (qZSIs) were proposed for different applications. Existing solutions were reviewed in [10][11][12][13][14], and different relevant issues are addressed in [15][16][17][18][19][20]. However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution.…”

mentioning

confidence: 99%

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

et al. 2019

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This paper describes a bidirectional twisted single-phase single-stage buck-boost dc-ac converter based on an output unfolding circuit. This solution is derived by the combination of an inverting buck-boost dc-dc converter and an unfolding circuit. The operation principle, component design guidelines, along with the control approach are presented. The zero-crossing distortion problem is discussed and solved by a simple approach. The simulation and experimental results confirm all theoretical statements. Loss distribution and achievable efficiency are analyzed. Finally, the pros and cons of the proposed solution, along with the most promising application field, are analyzed and discussed in the conclusion.Another application field of the dc-ac converter with wide input voltage regulation is battery storage. Lithium-ion batteries are targeted to become the most popular choice for on-grid and grid-off solar battery storage in the foreseeable future. Such types of batteries have a wide range of input voltage. A converter that accepts different storage elements is preferable.Several single-stage alternatives were presented as alternative solutions. Inverters with an active boost cell were described in [6][7][8][9]. These inverters provide very high boost of the input voltage but suffer from high current spikes in the semiconductors and passive elements. Impedance-source networks have been reported in many research papers as a promising single-stage solution. Z-source inverters (ZSIs) and quasi-Z-source inverters (qZSIs) were proposed for different applications. Existing solutions were reviewed in [10][11][12][13][14], and different relevant issues are addressed in [15][16][17][18][19][20]. However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution. According to the literature, SPIs have less passive component counts accompanied by higher voltage and current stresses at lower voltage gains, and they do not have short circuit immunity.Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application. For example, the solution [26] requires reverse-blocking IGBTs, while others are quite complex solutions.An Aalborg inverter ( Figure 1b) is proposed as an inverter that combines buck and boost functionality [30][31][32][33][34][35]. These solutions have two independent buck-boost stages that are responsible for output sinusoidal voltage generation. The main advantage of the proposed solution is in the minimum voltage drop of the filtering inductors in the power loop at any time. At the same time, this solution uses a double number of semiconductors and an inductor in the buck and boost stage, which is an obvious drawback. Another drawback consists in the two power sources utilization. A similar idea with double components is discussed in [36].The solution based on the input boost a...

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Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

Cited by 37 publications

References 45 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

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

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

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