Results 21 to 30 of about 5,828,637 (285)

Inherently Decoupled Dc-Link Capacitor Voltage Control of Multilevel Neutral-Point-Clamped Converters

, 2023
This letter derives and discusses the superiority of a simple dc-link capacitor voltage control configuration for multilevel neutral-point-clamped converters with any number of levels.
Sergio Busquets-Monge (9223913), Gabriel Garcia-Rojas (14424927), José M. Campos-Salazar (14827999), Robert Griñó (14827996)   +3 more
core   +1 more source

Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]

, 2012
We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P., MacKinnon, A.L., Burge, C. A., MacKinnon, A. L., Burge, C.A.   +4 more
core   +1 more source

Flexible arc suppression method for single-phase to ground fault in distribution network based on Z-type grounding transformer

Gong-kuang zidonghua, 2022
The coal mine power supply and distribution system usually adopts the neutral point non-effectively grounded method. Most of the power supply lines in this method use cable lines.
SI Weibin, MA Kexiang, LEI Zhirong, DANG Changfu, SONG Guobing, YUN Baoji, LIU Bin   +6 more
doaj   +1 more source

A new family of boost active neutral point clamped inverter topology with reduced switch count

IET Power Electronics, 2021
A new family of inverter topology for active neutral point clamped (ANPC) is proposed. The traditional ANPC gives the output voltage of half the input voltage which necessitates the use of higher input dc‐link voltage.
Marif Daula Siddique, B. Prathap Reddy, Atif Iqbal, Saad Mekhilef   +3 more
doaj   +1 more source

Carrier-Based PWM Strategy of Three-Level Neutral-Point-Clamped Inverter With Optimal Extension Mode

IEEE Open Journal of Power Electronics
Neutral point voltage ripple is the main technical drawback of the three-level neutral-point-clamped (3L-NPC) inverters. Conventional hybrid PWM strategies, which combine zero sequence voltage injection PWM (ZVI-PWM) with double modulation wave PWM (DMW ...
Guozheng Zhang, Yufei Liu, Xin Gu, Wenhao Huang, Wei Chen   +4 more
doaj   +1 more source

Loss comparison of 2 and 3-level inverter topologies

, 2010
This paper investigates semiconductor and DC-link capacitor losses in two two-level and two three-level voltage source inverters. The components of the four inverters are selected to have appropriate voltage and current ratings.
Orfanoudakis, G., Yuratich, M., Abu-Sara, M., Sharkh, S.   +3 more
core   +2 more sources

Discontinuous PWM Strategy for Neutral Point Clamped Three-Level Inverter to Achieve Multiple Control Objectives

IEEE Access, 2019
In order to reduce switching loss of neutral-point clamped (NPC) three-level inverter (TLI), a switching loss minimized discontinuous PWM (SLMDPWM) strategy is proposed firstly.
Jinping Wang, Wei Zhang, Mingna Ma, Qingyan Zhang, Weidong Jiang   +4 more
doaj   +1 more source

Low Frequency Harmonics Reduction Discontinuous PWM Strategy With Active Neutral Point Voltage Control for Neutral Point Clamped Three-Level Inverter

IEEE Access, 2020
The traditional discontinuous pulse width modulation (DPWM) strategy is very suitable for reducing the switching losses of three-level inverter (TLI).
Weidong Jiang, Qingyan Zhang, Ma Mingna, Xinmei Huang   +3 more
doaj   +1 more source

Analysis of fault current and overvoltage at the neutral point of ±800 kV High-Voltage DC converter transformer

Energy Reports, 2022
In order to enhance the security of ±800 kV High-Voltage DC (HVDC) system, it is needed to consider and analyze the grounding mode of the neutral point of converter transformer.
Jiaqing Fu, Yang Han, Ping Yang, Congling Wang, Amr S. Zalhaf   +4 more
doaj   +1 more source

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk, Sebastian Michaelis, Michaela Döring, Thomas Eichholz, Ursula Holzer, Martin Ebinger, Tim Flaadt, Rupert Handgretinger, Peter Lang, Jan Frederic Weller, Markus Mezger   +10 more
wiley   +1 more source