Results 21 to 30 of about 133,244 (304)
Energies, 2018 In order to solve the neutral-point voltage unbalancing problem for neutral-point clamped (NPC) three-level inverters under non-ideal grid conditions, a novel zero-sequence component injection method for modulation signals was proposed in this paper ...
Jian Guo Lyu +3 more
doaj +1 more source
Determination of the levitation limits of dust particles within the sheath in complex plasma experiments [PDF]
, 2011 Experiments are performed in which dust particles are levitated at varying heights above the powered electrode in a RF plasma discharge by changing the discharge power.
Angela Douglass +6 more
core +3 more sources
DC link capacitor voltage balancing in three level neutral point clamped inverter [PDF]
2012 IEEE 13th Workshop on Control and Modeling for Power Electronics (COMPEL), 2012 Multilevel inverters are becoming increasingly popular for high and medium power applications. The diode clamped multilevel inverter (DCMLI) is an attractive high voltage multilevel inverter due to its robustness. The deviating voltage at the neutral point remains always a distracting feature in NPC inverter.
Saad Mekhilef +2 more
openaire +1 more source
发电技术, 2022 In order to maximize the grid-connected power of high-power offshore wind turbines, a maximum power tracking strategy suitable for medium voltage six-phase permanent magnet synchronous generator (MVSPMSG) was proposed in the paper based on the use of ...
ZHAO Haichuan +5 more
doaj +1 more source
Controlling Polymer Capture and Translocation by Electrostatic Polymer-Pore Interactions [PDF]
, 2017 Polymer translocation experiments typically involve anionic polyelectrolytes such as DNA molecules driven through negatively charged nanopores. Quantitative modelling of polymer capture to the nanopore followed by translocation therefore necessitates the
Abramowitz M. +4 more
core +2 more sources
Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer [PDF]
Control Engineering Practice, 2014 Este documento aborda los problemas asociados con los voltajes del capacitor del enlace de CC del convertidor de potencia con bloqueo de punto neutro de tres niveles: el desequilibrio de los voltajes del capacitor , así como la presencia de una oscilación de baja frecuencia del voltaje de CA en el enlace de CC.
Francisco Umbría +5 more
openaire +4 more sources
Neutral‐point voltage balancing in wind power NPC three‐level converter
Electronics Letters, 2017 Neutral‐point‐clamped (NPC) three‐level converter has been widely used in wind power generation systems. However, traditional NPC three‐level converter often suffers excessive voltage fluctuation at the neutral point of DC‐link capacitors. This problem may leads to switching devices damage and increases additional harmonics in output voltage of the ...
Peng Qian, Liangbi Li
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Band-Limited Three-Level Modulation for Balancing Capacitor Voltages in Neutral-Point-Clamped Converters [PDF]
IEEE Transactions on Power Electronics, 2020 In this article, a band-limited three-level modulation scheme is proposed for a three-phase neutral-point-clamped (NPC) converter with an aim to balance the average capacitor voltages under all operating conditions. When conventional carrier-based pulsewidth modulation is applied, the amplitude of neutral point (NP)-voltage ripple tends to increase ...
Neha Beniwal +5 more
openaire +3 more sources
A Neutral Point Voltage Balancing Method for Multi-Level GTO Inverters
Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting, 2006 The balancing problem of the DC-link capacitor voltage is inherent in the NPC inverter. It is extremely important to keep the upper and lower DC-link capacitor voltages balanced to guarantee the three level operation of the inverter. Generally, the balancing of the DC-link voltage degrades at very low operating frequencies of the inverter.
openaire +2 more sources
Neutral points voltage balancing control of a four-level π-type converter [PDF]
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016 In this paper, a carrier-based modulation method with optimal zero-sequence signal injection has been introduced to modulate a four-level π-type converter as well as regulate its DC-link neutral points' voltages. The two neutral points' voltages can be well controlled with a back-to-back configuration even under high modulation index and high power ...
Jin, Bosen, Yuan, Xibo
openaire +2 more sources