An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter

Wang, Huaibao; Wang, Sheng; Ding, Hao; Shi, Changli; Jia, Dongqiang; Chen, Chao; Guerrero, Josep M.

doi:10.3390/en15072598

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…A current-source converter also has the advantages of inherent current limiting and short-circuit protection capability, low switching dv/dt and high reliability [4]. Therefore, it is widely used in high-voltage direct-current transmission systems [5] and electric vehicles [6], wind/solar power generation systems [7,8], and so on.…”

Section: Introductionmentioning

confidence: 99%

A Novel Overlap-Time Effect Suppression for Current Source Converter

Ding

Yuan

et al. 2022

Energies

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In order to ensure the continuity of the DC-side inductor current, current source converter (CSC) needs to add overlap time between the drive signals, but the overlap time will introduce low order (mainly fifth and seventh) harmonics to the grid current, which seriously degrade the harmonic performance of grid current. At present, some research has been conducted to theoretically analyze and mitigate the overlap-time effect in CSC, including the use of positive-slope sawtooth wave or negative-slope sawtooth wave as the carrier wave, turning on the switch early or delaying turning it off, and eliminating the deviation effect by compensation algorithms, etc. However, existing overlap-time suppression schemes takes the nearest three vector synthesis reference vector scheme as the object of study, in other words, the effect of overlap time on the non-nearest three-vector synthesis reference vector scheme has not been considered. To address these issues, this paper takes the non-nearest three-vector synthesis reference vector scheme as the object of study to analyze the effect of overlap time on the driving signal and establishes the quantitative relationship between the current harmonics introduced in the grid current and overlap time through Fourier decomposition. Then, the design process of the proposed improved space vector modulation by constructing freewheeling channels to replace the overlap time is presented in detail. Finally, simulation and experimental results verify that the overlap-time suppression effect of the proposed scheme is about 100%.

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Section: Introductionmentioning

confidence: 99%

A Novel Overlap-Time Effect Suppression for Current Source Converter

Ding

Yuan

et al. 2022

Energies

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Design and Implementation of Robust H∞ Control for Improving Disturbance Rejection of Grid-Connected Three-Phase PWM Rectifiers

Ait Ramdane,

Rahoui,

Boukais

et al. 2024

Energies

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In response to the high performance requirements of pulse width modulation (PWM) converters in grid-connected power systems, H-Infinity (H∞) control has attracted significant research interest due to its robustness against parameter variations and external disturbances. In this work, an advanced robust H∞ control is proposed for a grid-connected three-phase PWM rectifier. A two-level control strategy is adopted, where cascaded H∞ controllers are designed to simultaneously regulate the DC bus voltage and input currents even under load disturbances and non-ideal grid conditions. As a result, unit power factor, stable DC bus voltage, and sinusoidal input currents with lower harmonics can be accurately achieved. The design methodology and stability of the proposed controller are verified through a comprehensive analysis. Simulation tests and experimental implementation on a dSPACE 1103 board demonstrate that the proposed control scheme can effectively enhance disturbance rejection performance under various operating conditions.

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An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter

Cited by 2 publications

References 20 publications

A Novel Overlap-Time Effect Suppression for Current Source Converter

A Novel Overlap-Time Effect Suppression for Current Source Converter

Design and Implementation of Robust H∞ Control for Improving Disturbance Rejection of Grid-Connected Three-Phase PWM Rectifiers

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