An Active Filter Method to Eliminate DC-Side Low-Frequency Power for Single-Phase Quasi-Z Source Inverter

Ge, Baoming; Liu, Yushan; Abu‐Rub, Haitham; Balog, Robert S.; Peng, Fang Zheng; Sun, Haiyan; Li, Xiao

doi:10.1109/tie.2016.2551680

Cited by 64 publications

(36 citation statements)

References 27 publications

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“…where V in is the input dc voltage. Note that when M is constant, there is a low frequency component in the input current coming out from the low frequency component in the dc-link voltage, which is normal in the single-phase systems [15]- [18]. Such low frequency component in the input current can effectively be mitigated in any closed-loop system as in [19]- [21].…”

Section: B Mathematical Derivationmentioning

confidence: 99%

Performance Evaluation of the Single-Phase Split-Source Inverter Using an Alternative DC–AC Configuration

Abdelhakim

Mattavelli

Davari

et al. 2018

IEEE Trans. Ind. Electron.

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This paper investigates and evaluates the performance of a single-phase split-source inverter (SSI), where an alternative unidirectional dc-ac configuration is used. Such configuration is utilized in order to use two common-cathode diodes in a single-device instead of using two separate diodes, resulting in minimum parasitic inductance in the commutation paths. In this paper, the analysis and modulation of the single-phase SSI using this alternative configuration is discussed, and the analysis of the low frequency component in the dc side is introduced. Moreover, the features behind employing the triangular, the trailing-edge sawtooth, and the leading-edge sawtooth carriers with the single-phase SSI are discussed, and the differences among these carriers are highlighted. In order to highlight the performance of the proposed SSI, a comparative study is conducted with the two-stage architecture and the single-phase quasi-Z-source inverter (qZSI). The introduced analysis is enhanced with simulation results using MATLAB/PLECS models, where a 1-kVA single-phase SSI is designed and simulated. Finally, the designed 1-kVA single-phase SSI is implemented experimentally and tested at different operating points, i.e. at different voltage gains, and a maximum efficiency of 95.5% has been obtained.

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Section: B Mathematical Derivationmentioning

confidence: 99%

Performance Evaluation of the Single-Phase Split-Source Inverter Using an Alternative DC–AC Configuration

Abdelhakim

Mattavelli

Davari

et al. 2018

IEEE Trans. Ind. Electron.

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“…The input power of quasi-Z-source network is (6) where D is the shoot-through duty cycle [12]. [13] has analyzed the second harmonic ripple of quasi-Z-source network, that is 7where I L1 and V C1 are the average current of inductor L1 and the average voltage of capacitor C1, respectively. The amplitudes of the second ripple of voltage and current are (8) (9) where L and C are the inductor and capacitor of the quasi-Z-source network.…”

Section: A Existing Problem Analysismentioning

confidence: 99%

“…Two capacitors are used as energy storage in [8]. These APFs are suitable for single-phase PWM rectifier, and some methods have been proposed to solve the second harmonic current in single-phase z-source inverters [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

Active Power Filter for Single-Phase Quasi-Z-Source Integrated On-Board Charger

Zhang

Tang

2018

CPSS TPEA

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Single-phase quasi-Z-source rectifiers have second harmonic currents and corresponding ripple voltages on the dc bus. To filer the voltage ripple, bulky capacitor bank is needed. This paper proposed an active power filter (APF) for single-phase quasi-Z-source rectifier. It eliminated the second harmonic power with small capacitor and inductor. This topology is suitable to integrated electric vehicle (EV) on-board charger, which can use EV's inverter hardware as its own rectifier hardware. Thus, this proposed topology can save much space and weight. Simulation and experimental results verified the proposed system.

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“…For the single-phase inverter system, the double-frequency (2ω) power flows between the DC side, and the AC side causes 2ω ripples of capacitor and DC link voltage, 2ω ripples of inductor and DC link current. These 2ω ripples will cause the temperature of passive devices and the DC source to increase, which seriously affects their working life, distort the output voltage of the inverter, and the low frequency current ripple components in the DC side will affect the maximum power point tracking (MPPT) and reduce the efficiency of the photovoltaic system [8][9][10][11][12][13][14]. Therefore, it is necessary to suppress the 2ω ripple in the DC side.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, simulation and experimental results demonstrate the correctness and effectiveness of the proposed modulation strategy for the single-phase QZSI.Energies 2019, 12, 3344 2 of 12The active power filter (APF) technology is usually applied to the ripple suppression for QZSI. In [11], an active-filter-integrated single-phase QZSI was proposed: The APF consists of an extra switch leg and a second-order filter; the 2ω pulsating power of the AC load is transferred to the filter and the extra leg; the capacitor voltage and the inductor current in the DC side will no longer have the 2ω ripple component with this method, but an extra circuit means a higher cost and more complicated control. In [12,13], 2ω ripple control strategies were proposed based on feed-back control.…”

mentioning

confidence: 99%

Ripple Vector Cancellation Modulation Strategy for Single-Phase Quasi-Z-Source Inverter

Tang¹,

Li²,

Chen³

et al. 2019

Energies

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The double-frequency (2ω) power flows through the DC side of the single-phase quasi-Z-source inverter (QZSI) leads to the 2ω voltage ripple of capacitors and 2ω current ripple of inductors. This paper proposes a ripple vector cancellation modulation strategy (RVCMS) based on the thought of ripple vector cancellation. By analyzing the mechanism of ripple generation and transmission, we can obtain a variation of a shoot-through duty cycle to generate a compensated 2ω ripple used to cancel the 2ω current ripple of inductors caused by the 2ω ripple of DC link current, and the 2ω compensated variation of a shoot-through duty cycle with a specific amplitude and phase is added to the constant shoot-through duty cycle. Finally, simulation and experimental results demonstrate the correctness and effectiveness of the proposed modulation strategy for the single-phase QZSI.Energies 2019, 12, 3344 2 of 12The active power filter (APF) technology is usually applied to the ripple suppression for QZSI. In [11], an active-filter-integrated single-phase QZSI was proposed: The APF consists of an extra switch leg and a second-order filter; the 2ω pulsating power of the AC load is transferred to the filter and the extra leg; the capacitor voltage and the inductor current in the DC side will no longer have the 2ω ripple component with this method, but an extra circuit means a higher cost and more complicated control. In [12,13], 2ω ripple control strategies were proposed based on feed-back control. In [12], a low-pass filter was used to obtain the 2ω ripple of the inductor current in the DC side by extracting its DC component, which is used to generate a small variation of the shoot-through duty cycle, and Reference [13] regards the 2ω voltage ripple of the DC source as the feed-back signal. Reference [14] proposes a 2ω ripple suppression method based on feed-forward control: The feed-forward signal is obtained by a ripple observer, which can observe the 2ω current of the DC link by detecting the output current of the inverter. References [12][13][14] can realize the suppression of the 2ω ripple without an extra active filter circuit; we can call it virtual APF technology. However, they still need filters or sensors to detect the 2ω ripple components, which will increase the cost. Therefore, the relationship between the variation of the shoot-through duty cycle and the 2ω ripple in the DC side, and realizing the suppression of the 2ω ripple with less hardware, needs further study.Reducing the modulation ratio of QZSI can effectively reduce the ripple content in the DC side; however, with the decrease of the modulation ratio and the increase of the shoot-through duty cycle, the harmonic distortion value of the inverter output voltage and the loss of switching devices will increase [15]. Some new modified modulation strategies have been addressed. In [16], a modified modulation strategy was proposed, which was different from the traditional modulation strategy; the shoot-through control lines are modified to a line with a 2ω component. R...

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An Active Filter Method to Eliminate DC-Side Low-Frequency Power for Single-Phase Quasi-Z Source Inverter

Cited by 64 publications

References 27 publications

Performance Evaluation of the Single-Phase Split-Source Inverter Using an Alternative DC–AC Configuration

Performance Evaluation of the Single-Phase Split-Source Inverter Using an Alternative DC–AC Configuration

Active Power Filter for Single-Phase Quasi-Z-Source Integrated On-Board Charger

Ripple Vector Cancellation Modulation Strategy for Single-Phase Quasi-Z-Source Inverter

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