Minimum DC-Link Capacitance for Single-Phase Applications With Power Factor Correction

Marcos-Pastor, Adria; Vidal-Idiarte, Enric; Cid-Pastor, A.; Martínez-Salamero, L.

doi:10.1109/tie.2019.2922925

Cited by 28 publications

(29 citation statements)

References 6 publications

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“…which may be solved using any available computational package to obtain the value of V * DC . Then, C DC should be obtained by substituting the resulting value of V * DC with (15).…”

Section: Methodsmentioning

confidence: 99%

“…This methodology applies to converters that operate with unity power factor and a zero-sequence component injected into modulation signals comprising solely a DC component. The present study merges the approach introduced in reference [32] with the concept proposed in [15] to ascertain the lowest achievable values of split DC link capacitance through maximal increase of DC link voltage ripple. It is shown that the proposed methodology allows the attainment of a two-fold reduction of utilized DC link capacitance compared to the technique proposed in [32].…”

Section: Introductionmentioning

confidence: 99%

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On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

et al. 2023

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This paper introduces an approach to calculating the minimum value of split DC link capacitance in three-phase three-level grid-connected DC-AC converters operating with unity power factor without either active balancing circuits or AC zero sequence injection. Due to the fact that partial DC link voltages and rectified mains phase voltages reach their maximum and minimum values, respectively, at different time instants, it is feasible to decrease the minimum value of the former below the maximum value of the latter while still maintaining proper functionality of the power stage. The minimum possible split DC link capacitance values are hence derived from the boundary condition where the above-mentioned voltages are tangent to each other. The accuracy of the analytical derivations is confirmed by simulations and experiments carried out on a 10 kVA T-type converter prototype, which show a high degree of agreement.

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“…which may be solved using any available computational package to obtain the value of V * DC . Then, C DC should be obtained by substituting the resulting value of V * DC with (15).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

et al. 2023

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“…thereby imposing a limit to the maximum module LF dc-link voltage fluctuation and/or a minimum dc-link capacitance value C dc [29]. Further, C dc needs to be sized such that the maximum dc-link voltage U dc,max is not exceeded, i.e.,…”

Section: (B)mentioning

confidence: 99%

Third-Harmonic-Type Modulation Minimizing the DC-Link Energy Storage Requirement of Isolated Phase-Modular Three-Phase PFC Rectifier Systems

et al. 2023

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A three-phase ac/dc converter with high-frequency isolation can be realized as a monolithic three-phase or as a phase-modular system by combining three single-phase Power Factor Correction (PFC) rectifier modules with individual isolated dc-dc converters. Advantageously, for a phase-modular system the module configuration can be changed depending on the instantaneous input-output voltage ratio (i.e., a star-(Y)-or a delta-(∆)-arrangement such that wide voltage ranges can be covered without a massive over-dimensioning of the main power components. However, the main disadvantage of a phase-modular converter realization is the fact that the input power of each PFC rectifier module pulsates at twice the mains frequency (which is inherent to single-phase power conversion) such that large dc-link capacitors are required. Recent literature predicts a substantial power pulsation reduction enabled by means of third-(3 rd )harmonic injection modulation which is applicable for the Y-connection (where a common-mode (CM) / zero-sequence (ZS) voltage is injected), and for the ∆-connection of the three single-phase PFC rectifier modules (where a CM / ZS current is injected). This changes the distribution of the power flow in the three-phase system and the power pulsation is shifted to higher frequencies. This paper experimentally verifies and extends the dc-link energy storage requirement reduction of the 3 rd -harmonic injection modulation concept: In a first step, the derivation of the harmonic injection concept is recapitulated and suitable control methods are discussed for both CM voltage (Y-arrangement) and CM current (∆-arrangement) injection. Further, an alternative CM voltage injection strategy with simplified reference generation based only on the instantaneous grid voltage measurements is presented and compared to the pure 3 rd -harmonic injection modulation. Measurement results obtained from a 6 kW prototype reveal a dc-link voltage variation and/or energy buffering reduction by up to 38.6 % enabled by the harmonic injection modulation compared to conventional operation without 3 rd -harmonic injection modulation.

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“…These filter capacitances could also be implemented as solid-state variable capacitors, as, e.g., shown in [25] and [26] for single-phase systems. However, since the minimum required storage capacities are inversely proportional to the frequency of the pulsation [27] and the frequency of the power pulsation can take on very small frequencies down to zero (0.1 Hz in the example described above), the issue actually cannot be solved in this way. Alternatively, the pulsating power could be supplied to the grid.…”

Section: Introductionmentioning

confidence: 99%

Duty-Cycle Dependent Phase Shift Modulation of Dual Three-Phase Active Bridge Four-Port AC–DC/DC–AC Converter Eliminating Low Frequency Power Pulsations

Heller

Krismer

Kolar

2022

IEEE Open J. Power Electron.

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Minimum DC-Link Capacitance for Single-Phase Applications With Power Factor Correction

Cited by 28 publications

References 6 publications

On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

Third-Harmonic-Type Modulation Minimizing the DC-Link Energy Storage Requirement of Isolated Phase-Modular Three-Phase PFC Rectifier Systems

Duty-Cycle Dependent Phase Shift Modulation of Dual Three-Phase Active Bridge Four-Port AC–DC/DC–AC Converter Eliminating Low Frequency Power Pulsations

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