Journal ArticleDOI
A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter
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TLDR
In this article, the authors describe the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive, where the inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional choppercells.Abstract:
This paper describes the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive. The inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional chopper-cells. The dominant ac-voltage fluctuation with the same frequency as the motor (inverter) frequency occurs across the dc capacitor of each chopper-cell. The magnitude of the voltage fluctuation is inversely proportional to the motor frequency. This paper achieves theoretical analysis on the voltage fluctuation, leading to system design. A downscaled model rated at 400 V and 15 kW is designed and built up to confirm the validity and effectiveness of the nine-level (17-level in line-to-line) PWM inverter for a medium-voltage motor drive.read more
Citations
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Proceedings ArticleDOI
High-voltage tapped-inductor buck converter auxiliary power supply for cascaded converter submodules
TL;DR: In this article, the authors present a discussion of the requirements for an auxiliary power supply for high-power modular multilevel converter submodules, and some of the most challenging problems in designing a low power high voltage step-down converter are presented.
Proceedings ArticleDOI
Modular Multilevel Converter for wind power generation system connected to micro-grid
TL;DR: In this article, an AC-DC converter which is constructed by a Modular Multilevel Converter (MMC) for a wind power generation system connected to micro-grid is discussed.
Journal ArticleDOI
A novel MMC control scheme to increase the DC voltage in HVDC transmission systems
Rui Li,John E. Fletcher +1 more
TL;DR: In this paper, the authors investigated third harmonic injection applied to a modular multilevel converter (MMC) to generate a higher DC voltage, which is achieved using a novel control scheme that activates existing submodules (SMs) in the converter arms.
Proceedings ArticleDOI
Improving capacitor voltage ripples and power losses of modular multilevel converters through discontinuous modulation
Ricard Picas,Salvador Ceballos,Josep Pou,Jordi Zaragoza,Georgios Konstantinou,Vassilios G. Agelidis +5 more
TL;DR: A discontinuous modulation technique for reducing the amplitude of the capacitor voltage ripples and the switching losses, especially at low modulation indices, is presented.
Proceedings ArticleDOI
Impact of cable and motor loads on wide bandgap device switching and reflected wave phenomenon in motor drives
TL;DR: In this article, the impact of inductive source impedance on the reflected wave Phenomenon (RWP) was studied and the effect of the cable parasitic including the ground and shield wires were studied.
References
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Journal ArticleDOI
Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components
TL;DR: In this paper, a new instantaneous reactive power compensator comprising switching devices is proposed, which requires practically no energy storage components, and is based on the instantaneous value concept for arbitrary voltage and current waveforms.
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Instantaneous power theory and applications to power conditioning
TL;DR: The p-q theory in three-phase, four-wire Shunt Active Filters as discussed by the authors has been applied to power flow control in power electronics equipment and has been shown to be useful in many applications.
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High-Power Converters and AC Drives
TL;DR: In this article, the authors present a model for high-power switchings with SCR rectifiers and demonstrate how to use SCR Rectifiers to control high power switchings.
Journal ArticleDOI
Control and Experiment of Pulsewidth-Modulated Modular Multilevel Converters
Makoto Hagiwara,Hirofumi Akagi +1 more
TL;DR: In this article, two types of pulsewidth-modulated modular multilevel converters (PWM-MMCs) with focus on their circuit configurations and voltage balancing control are investigated.
Journal ArticleDOI
Active Harmonic Filters
TL;DR: This paper deals with general pure active filters for power conditioning, and specific hybridactive filters for harmonic filtering of three-phase diode rectifiers.
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