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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Journal ArticleDOI
A Four-level Hybrid-Clamped Converter With Natural Capacitor Voltage Balancing Ability
TL;DR: It can be concluded that the voltages across the flying capacitor and dc-link capacitors can be naturally balanced under ideal and steady-state condition.
Proceedings ArticleDOI
A survey of low-switching frequency modulation techniques for medium-voltage multilevel converters
TL;DR: The goal of this paper is to provide a review of various LDSF modulation techniques proposed in the literature and also discuss in detail about one of the emerging LDSF control techniques known as synchronous optimal pulsewidth modulation.
Journal ArticleDOI
Voltage-Balancing Method for Modular Multilevel Converters Switched at Grid Frequency
Fujin Deng,Zhe Chen +1 more
TL;DR: A voltage-balancing method is proposed for the MMC switched at grid frequency with reduced losses and does not rely on the arm current, and the results confirm the effectiveness of the proposed capacitor voltage- Balancing method.
Journal ArticleDOI
A Cascaded Photovoltaic System Integrating Segmented Energy Storages With Self-Regulating Power Allocation Control and Wide Range Reactive Power Compensation
TL;DR: In this article, a single-phase photovoltaic (PV) system integrating segmented energy storages (SES) using cascaded multilevel inverter is presented.
Proceedings ArticleDOI
Dimensioning and design of a Modular Multilevel Converter for drive applications
TL;DR: In this article, the inductance of the arm choke, depending on the modulation strategy, is determined and the voltage rating and the required size of the capacitors in the cells are calculated.
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.
Book
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.
Book
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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