A Modified One Cycle Control of VIENNA Rectifier for Neutral Point Voltage Balancing Control Based on Cycle-by-cycle Correction

Cheng, Hong; Ma, Yue; Wang, Cong

doi:10.1109/peac.2018.8590331

Cited by 4 publications

(1 citation statement)

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“…Hence, the entire DC voltage bus still follows its reference, but an overvoltage appears on one of the two capacitors. The simplest solution to correct this imbalance is to use an additional control loop that adds a component to the reference current [22,23] as shown in Figure 4 PI Voltage…”

Section: Bus Balance Managementmentioning

confidence: 99%

A New Robust Digital Non-Linear Control for Power Factor Correction—Arc Welding Applications

et al. 2021

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A welding power source is commonly assimilated to a non-linear load. Arc welding market being in full growth, the resulting harmonic pollution is becoming an increasingly difficult problem to ignore. Therefore, the main purpose of this work is to define and implement the most suitable solution for power factor correction in a welding power source. Due to the high non-linearity of the electric arc, the current controller used to control grid current need to show high robustness. Consequently, this paper focuses on the digitization of a very robust Phase-Shift Self-Oscillating Current Controller (PSSOCC), which only exists in its analog version until then, to carry out this task. After quick descriptions of the entire energy conversion chain and the PSSOCC operation principle, a model of the digital PSSOCC is proposed. Then, the quality and the accuracy of the aforementioned model are evaluated and its operating limits are identified. Afterwards, the behavior of the digital controller is studied within a Power Factor Correction (PFC) regulation for several specific arc welding operating modes. Finally, excellent robustness of this new FPGA-based digital current controller, named DPSSOCC, is confirmed on a three-phase Vienna converter test bench.

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Section: Bus Balance Managementmentioning

confidence: 99%