Results 1 to 10 of about 13,286,610 (209)

Neutral-Point Voltage Balancing Method for Three-Phase Three-Level Dual-Active-Bridge Converters

open access: yesEnergies, 2022
Three-phase three-level dual-active-bridge (3L-DAB3) converters are a potential topology for high-voltage and high-power applications. Neutral-point voltage balancing is a complex and important issue for three-level (3L) circuits.
Xinmi Wu, Yu Zhang, Jiawen Yang
doaj   +4 more sources

A neutral-point potential balancing control method with third harmonic injected pulse width modulation for three-level converters

open access: yesEnergy Reports, 2022
The unbalance of neutral-point potential (NPP) is an important problem in three-level converter. This paper proposes a neutral-point potential balancing control method with the third harmonic injected pulse width modulation (PWM) for three-level ...
Jie Tian   +4 more
doaj   +4 more sources

A Novel SVPWM Algorithm Considering Neutral-Point Potential Balancing for Three-Level NPC Inverter [PDF]

open access: yesElectronics, 2016
For three-level inverter, complexity of control strategy and neutral-point potential imbalance problem of DC side is the bottleneck restricting its application.
Chen Yongchao, Li Yanda, Zhao Ling
doaj   +3 more sources

A Study on Neutral-Point Potential in Three-Level NPC Converters

open access: yesEnergies, 2019
This paper proposes an accurate mathematical model of three-level neutral-point-clamped (NPC) converters that can accurately represent the midpoint potential drift of the DC link with parameter perturbation.
Maosong Zhang   +6 more
doaj   +2 more sources

A Modified Neutral-point Voltage Control Strategy for Three-level Inverters Based on Decomposition of Space Vector Diagram

open access: yesCES Transactions on Electrical Machines and Systems, 2022
Capacitor voltage imbalance is a significant problem for three-level inverters. Due to the mid-point modulation of these inverter topologies, the neutral point potential moves up or down depending on the neutral point current direction creating ...
Dereje Woldegiorgis, H. Alan Mantooth
doaj   +1 more source

Baseline for Split DC Link Design in Three-Phase Three-Level Converters Operating with Unity Power Factor Based on Low-Frequency Partial Voltage Oscillations

open access: yesMachines, 2022
The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor.
Yarden Siton   +3 more
doaj   +1 more source

Control strategy of mine-used LCL three-level static var generator

open access: yesGong-kuang zidonghua, 2020
In order to adapt to special environment of coal mine and reduce volume and quality of mine-used static var generator(SVG), LCL filter and three-level inverter were used as main circuit topology of mine-used SVG.
ZHANG Chuanjin   +4 more
doaj   +1 more source

Hybrid Multilevel Converters: Topologies, Evolutions and Verifications

open access: yesEnergies, 2019
Multilevel converters have good potential in high power and high voltage applications due to their advantages of reduced voltage or current stress on power devices.
Jianzhong Zhang   +3 more
doaj   +1 more source

How and to which extent can the gas sector contribute to a climate-neutral European energy system? A qualitative approach

open access: yesEnergy, Sustainability and Society, 2019
Background Mitigating climate change requires fundamentally redesigned energy systems in which renewable energy sources ultimately replace fossil fuels such as natural gas.
Christian Lebelhuber, Horst Steinmüller
doaj   +1 more source

Jurisprudential Analysis of Uncapped Capital Protection Certificate as a New Instrument in Iran's Capital Market [PDF]

open access: yesتحقیقات مالی اسلامی (پیوسته)
1. Introduction and ObjectiveIn recent years, global capital markets have faced increasing pressure to diversify their range of investment instruments and to provide mechanisms that can better address the risk–return preferences of investors.
Kamran Salmani Qaraie   +3 more
doaj   +1 more source

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