Results 71 to 80 of about 89,929 (312)
Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
wiley +1 more source
Voltage Harmonics Measuring Issues in Medium Voltage Systems
, 2011 Voltage harmonic distortion level is one of the significant parameters of power quality in power system. Numerous problems related to voltage and current harmonic effects for contemporary power systems are commonly observed nowadays. Levels and spectral content of voltage distortions injected into electric power grids are tending to increase despite ...
openaire +3 more sources
Energies, 2021 In this paper the results of the tests of the wideband transformation accuracy of medium voltage (MV) inductive voltage transformers (VTs) in the frequencies range from 50 Hz up to 5 kHz are presented.
Michal Kaczmarek, Ernest Stano
doaj +1 more source
Power quality issues of 3MW direct-driven PMSG wind turbine [PDF]
, 2015 This paper presents power quality issues of a grid connected wind generation system with a MW-class direct-driven permanent magnet synchronous generator (PMSG).
Ahmed, IA, Taylor, GA, Zobaa, AF
core +1 more source
Advanced Functional Materials, EarlyView.This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous
Mingfeng Xu +5 more
wiley +1 more source
Future work on harmonics : some expert opinions part I : wind and solar power [PDF]
, 2014 A workshop on power system harmonics was organized in Stockholm in January 2014. On the agenda was among others a discussion on what are the main issues on harmonics at the moment and in the near future.
Amaris, Hortensia +9 more
core +1 more source
Advanced Functional Materials, EarlyView.This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger +10 more
wiley +1 more source
The influence of the network asymmetry on the settings and sensitivity of an earth fault protection using higher harmonics [PDF]
E3S Web of Conferences, 2019 Detection of high resistance earth faults in medium voltage networks is an important problem due to ineffectiveness of traditional earth fault protections.
Marciniak Lubomir, Piątek Mateusz
doaj +1 more source
Integrated series active filter for aerospace flight control surface actuation [PDF]
, 2007 The paper investigates integrated series active filters to satisfy aircraft power quality benchmarks and underlying design compromises. Advantages include reduced component count and retrofitting capability.
Bingham, Chris, Ganthony, D
core +1 more source
DFIG Harmonic Current Controlling with the Grid Low Harmonic Voltage
Research Journal of Applied Sciences, Engineering and Technology, 2014 This study presents a vector control strategy based on stator harmonic current closed-loop, it adds individually the control loop about of each stator harmonic current to restrain the stator harmonic current, in order to meet the THD criteria. The control strategy of restraining the harmonic current presents the design of the stator harmonic current ...
Huan Wang, Lei Pan
openaire +1 more source