Results 21 to 30 of about 739,942 (249)

Transient voltage stresses in MMC–HVDC links – impulse analysis and novel proposals for synthetic laboratory generation

High Voltage, 2018
To evaluate and optimise insulation coordination concepts for state of the art high-voltage direct current (HVDC) transmission systems, appropriate test voltage shapes are required for laboratory imitation of occurring stresses.
Claudius Freye, Simon Wenig, Max Goertz, Thomas Leibfried, Frank Jenau   +4 more
doaj   +1 more source

Research on 3‐D total electric field of crossing high voltage direct current transmission lines based on upstream finite element method

High Voltage, 2021
The ongoing large‐scale construction of ultra high voltage direct current projects in China makes the crossing of two high voltage direct current (HVDC) lines inevitable.
Xiaoqian Ma, Li Xie, Kun He, Jiayu Lu
doaj   +1 more source

Voltage Ripple Reduction in Voltage Loop of Voltage Source Converter

International Journal of Power Electronics and Drive Systems (IJPEDS), 2017
In order to achieve a good dynamical response of a full-bridge AC-DC voltage source converters (VSC). The bandwidth of PI controller must be relatively wide. This leads to the voltage ripple produced in the control signal, as known that its ripple frequency has twice of the line frequency and cause the 3rd harmonic of an input current. A Ripple Voltage
Jedsada Jaroenkiattrai, Viboon Chunkag
openaire   +1 more source

Voltage Graphs

Discrete Mathematics, 1974
AbstractA possible way to obtain a complicated graph imbedding in a surface is to derive it as a covering of a simpler imbedding by assigning “voltages” to the edges of the simpler imbedding. Although this new method is but the dual of the current graph construction,it has independent importance in practical applications, illustrated here by a ...
openaire   +2 more sources

Utility of Computed Tomography Surveillance of Asymptomatic Infection in Children and Young Adults Before Allogeneic Hematopoietic Stem Cell Transplant

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Asymptomatic infection poses a significant risk for children undergoing hematopoietic stem cell transplantation (HSCT). Pre‐transplant surveillance computed tomography (CT) is commonly used to identify occult infection, though its diagnostic yield remains uncertain.
Tyler Obermark, Pradipta Debnath, Rama S. Ayyala, Lara A. Danziger‐Isakov, Jane Koo, Kasiani C. Myers, William R. Otto, Aki Tanimoto, Andrew T. Trout, Cara E. Morin   +9 more
wiley   +1 more source

Optimization of Low-Carbon Integrated Energy Systems With Efficient Hydrogen Use and Flexible CCPP-MR-HCHP Operations

International Transactions on Electrical Energy Systems
With the increasing integration of renewable energy sources into the power system, challenges such as wind curtailment and operational flexibility are becoming more prominent.
Zheng Wang, Yang Qi, Rui Wang, Shaoyi Ren, Jun Wu   +4 more
doaj   +1 more source

Implications of Nonlinear Material Parameters on the Dielectric Loss under Harmonic Distorted Voltages

Energies, 2021
The increasing number of power electronic devices in electrical grids may lead to harmonic distorted voltages, which are considered to be possible causes of component failures. In this study, the dielectric losses of epoxy polymer and functionally filled
Thomas Linde, Jun Ting Loh, Stefan Kornhuber, Karsten Backhaus, Stephan Schlegel, Steffen Großmann   +5 more
doaj   +1 more source

Intraoperative Collection of Ascitic Fluid With Intra‐ or Postoperative Reinfusion in Ovarian Cancer: Safety and Feasibility of a Roller Pumping Method

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients with ovarian cancer often present with massive ascites, leading to significant protein loss during surgical procedures. Although cell‐free concentrated ascites reinfusion therapy (CART) is used in palliative settings to mitigate protein loss, its application in intraoperative settings remains unexplored.
Yutaka Yoneoka, Tsukuru Amano, Akimasa Takahashi, Mari Deguchi, Hiroyuki Yamanaka, Yuji Tanaka, Shunichiro Tsuji, Takashi Murakami   +7 more
wiley   +1 more source

Study of Transformer Core Vibration Considering Magnetostrictive Anisotropy

Active and Passive Electronic Components
Due to the influence of the magnetostrictive effect of silicon steel sheet, the core inevitably generates vibration in the working process of the transformer, and at the same time, there are differences in the magnetostrictive properties of silicon steel
Jian Zhang, Geqi Li, Yilin Wang, Yao Zhang   +3 more
doaj   +1 more source

Thermo-Oxidative Aging Effect on Charge Transport in Polypropylene/Ultra-High Molecular Weight Polyethylene Nanocomposites

Energies, 2023
This study investigates the impact of magnesium oxide (MgO) nanoparticles on the thermo-oxidative aging behavior of blends of polypropylene (PP) and ultra-high molecular weight polyethylene (UHMWPE).
Phichet Ketsamee, Orestis Vryonis, Alun Vaughan, Thomas Andritsch   +3 more
doaj   +1 more source