A Novel Single-Phase Buck PFC AC–DC Converter With Power Decoupling Capability Using an Active Buffer

Ohnuma, Yoshiya; Itoh, Jun‐ichi

doi:10.1109/tia.2013.2279902

Cited by 125 publications

(80 citation statements)

References 23 publications

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“…Thus, the capacitance should be designed in order to reduce the effect by the ripple voltage for the capacitor voltage control. The problems due to the ripple voltage of the capacitors have been also discussed in the conventional single-phase PFC converters (30) . Besides, the H-bridge cell of the MMC has same construction as that of the conventional single-phase PFC converter.…”

Section: Capacitor Valuementioning

confidence: 99%

Control Strategy for Modular Multilevel Converter based on Single-phase Power Factor Correction Converter

Nakanishi

Itoh

2017

IEEJ Journal IA

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This paper proposes a novel control strategy for a step-down rectifier that applies a modular multilevel converter (MMC). This paper first discusses the circuit configuration and the proposed control method. The main part of the control system is based on the control method for the single-phase power factor correction converter (PFC converter), which means that the conventional control techniques of the single-phase PFC converter can be simply applied to the MMC. The control elements which achieve step-down rectification and capacitor voltage balancing are added to the main part. Besides, in capacitor voltage balancing of the proposed control method, it is not necessary to design the control parameters. In addition, the operation of the proposed step-down rectifier is confirmed by the simulation. The simulation results show that the proposed converter achieves step-down rectification from the grid voltage of 6.6 kV to the DC voltage of 400 V. Moreover, the step-down rectifier maintains all capacitor voltages constant. Finally, a fundamental operation is confirmed by experiments using a miniature model. As the results, the step-down rectifier converts from the input grid voltage of 200 V to the output DC voltage of 75 V. Besides, the proposed step-down rectifier maintains the capacitor voltage of each cell to the voltage command of 130 V. The maximum error between the voltage command of the cell capacitor and the measured voltage is less than 2%.

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Section: Capacitor Valuementioning

confidence: 99%

Control Strategy for Modular Multilevel Converter based on Single-phase Power Factor Correction Converter

Nakanishi

Itoh

2017

IEEJ Journal IA

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“…In addition, the design guideline which focuses on the harmonic components of the circulating current and the resonance phenomenon between the arm inductor and capacitors in cells has been also considered (32) . On the other hand, as the design guideline for the inductor in general power converters, the inductance is determined based on the ripple factor of the inductor current (33) (34) . In the MMC, the ripple current changes responding to the switching frequency and the number of cells due to the change of the equivalent switching frequency.…”

Section: Introductionmentioning

confidence: 99%

Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

Nakanishi

Itoh

2017

IEEJ Journal IA

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This paper presents theoretical formulae for circuit parameter design as design guidelines in a step-down rectifier in a power system connected to a 6.6-kV AC power grid, where a modular multilevel converter (MMC) is applied. In particular, this paper focuses on the design of heat sinks, capacitors, and arm inductors. In addition, the worst case for each component design is shown as the first step of the converter design. First, the formula for the ripple current in the electrolytic capacitor is derived in order to evaluate the capacitor lifetime. Second, the formulae for the semiconductor losses are clarified on the basis of the analysis of the arm current. Third, the formula for the ripple current in the arm inductor is derived on the basis of the ripple current model of a chopper circuit. Finally, all formulae are verified by experiments with a miniature model. It is confirmed that theoretical values from formulae agree with the measured values with the errors lower than 12%.

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“…Unfortunately, E-caps are also known to be very vulnerable under high temperature operation, and they may bring design difficulties if long lifetime is desired for the power converter, e.g. in PV and light-emitting diode (LED) applications [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Although all of them can decouple the dc-link ripple power, film capacitors are always preferred for ripple energy storage because of their much lower equivalent series resistance (ESR) and higher power density as compared to inductors. Some more three-phase based singlephase power decoupling circuits can be found in [13][14][15][16][17] and the basic operating principle is the same.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of controller design, the aforementioned research works [9][10][11][12][13][14][15][16][17] also employ a similar control structure, where the required inductor current / capacitor voltage compensation reference is calculated according to the instantaneous power balancing equation, and then simple proportional resonant (PR) controllers can be designed for zero steady-state reference tracking. Although being effective in power decoupling, this kind of control approach is essentially an indirect regulation to the dc-link ripple voltage and its control accuracy is highly parameter dependent.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DQ reference frame modeling and control of single-phase active power decoupling circuits

Tang

Qin

Blaabjerg

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Power decoupling circuits can compensate the inherent double line frequency ripple power in single-phase systems and greatly facilitate their dc-link capacitor design. Example applications of power decoupling circuit include photovoltaic, light-emitting diode, fuel cell, and motor drive systems. This paper presents the dq synchronous reference frame modeling of single-phase power decoupling circuits and a complete model describing the dynamics of dc-link ripple voltage is presented. The proposed model is universal and valid for both inductive and capacitive decoupling circuits, and the input of decoupling circuits can be either dependent or independent of its front-end converters. Based on this model, a dq synchronous reference frame controller is designed which allows the decoupling circuit to operate in two different modes because of the circuit symmetry. Simulation and experimental results are presented to verify the effectiveness of the proposed modeling and control method.

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A Novel Single-Phase Buck PFC AC–DC Converter With Power Decoupling Capability Using an Active Buffer

Cited by 125 publications

References 23 publications

Control Strategy for Modular Multilevel Converter based on Single-phase Power Factor Correction Converter

Control Strategy for Modular Multilevel Converter based on Single-phase Power Factor Correction Converter

Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

DQ reference frame modeling and control of single-phase active power decoupling circuits

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