Results 21 to 30 of about 972,902 (254)

Assessment of the Phase-to-Ground Fault Apparent Admittance Method with Phase/Ground Boundaries to Detect Types of Electrical Faults for Protective Relays Using Signature Library and Simulated Events

International Transactions on Electrical Energy Systems, 2022
Protective relays in electric power grids recognize the types of electrical faults in a few seconds. The most common detection method to detect the types of electrical faults is based on measuring the angle between the zero and negative sequence currents.
Emilio C. Piesciorovsky, Marissa E. Morales Rodriguez   +1 more
doaj   +1 more source

Research on participation of flywheel energy storage in wind farm frequency regulation control

Zhejiang dianli, 2022
In view of a whole series of problems such as the reduction of system inertia， the increase of frequency fluctuation， and the deterioration of power quality caused by large-scale wind power integration， a flywheel with high power density is designed for ...
ZHANG Jihong, CUI Tianxiang, XIONG Wei, WU Zhengkui, ZHANG Zilei   +4 more
doaj   +1 more source

Vertical bifacial PV systems: irradiance modeling and performance analysis of a lightweight system for flat roofs

EPJ Photovoltaics
Vertical bifacial photovoltaic (PV) systems are gaining interest as they can enable deployment of PV in locations with grid or area limitations. Over Easy Solar has developed a lightweight design for vertical bifacial systems for flat roofs employing ...
Øgaard Mari B., Nysted Vilde Stueland, Rønneberg Sigrid, Otnes Gaute, Foss Sean Erik, Mongstad Trygve, Riise Heine N.   +6 more
doaj   +1 more source

Advanced characterization and simulation of SONNE: a fast neutron spectrometer for Solar Probe Plus [PDF]

, 2009
SONNE, the SOlar NeutroN Experiment proposed for Solar Probe Plus, is designed to measure solar neutrons from 1-20 MeV and solar gammas from 0.5-10 MeV.
Bloser, Peter F., Bravar, U, Fluckiger, E O, Legere, Jason S., MacKinnon, A L, Mallik, Procheta, McConnell, Mark L, Pirard, B, Ryan, James M., Woolf, R S   +9 more
core   +2 more sources

Techno-Economic Analysis of Beam-Down Solar Tower Secondary Reflectors

SolarPACES Conference Proceedings
Beam-down solar towers are presented as an alternative to conventional solar towers that allow modular design, easily adaptable to industrial environments.
Vishal Boga, Francisco Torres, Moritz Bitterling, Gregor Bern, Peter Schöttl, Sophie Gledhill, Mario Magaldi, Mario Cilento, Fulvio Bassetti   +8 more
doaj   +1 more source

Day-Ahead Operation Analysis of Wind and Solar Power Generation Coupled with Hydrogen Energy Storage System Based on Adaptive Simulated Annealing Particle Swarm Algorithm

Energies, 2022
As the low-carbon economy continues to evolve, the energy structure adjustment of using renewable energies to replace fossil fuel energies has become an inevitable trend.
Kang Chen, Huaiwu Peng, Zhenxin Gao, Junfeng Zhang, Pengfei Chen, Jingxin Ruan, Biao Li, Yueshe Wang   +7 more
doaj   +1 more source

Control Method for Improving Voltage Response and Ripple of Isolated DC-DC Converter

Frontiers in Energy Research, 2022
Affected by the abrupt changes of load and unregulated first-stage rectifiers, it is difficult for the output voltage of the isolated DC-DC converter with traditional proportional-integral (PI) control to meet the needs of industrial applications such as
Ming Li, Kairang Wang, Kairang Wang, Zhou Zhao, Hongyong Liu, Wenyu Zhang, Jian Kou, Jianhui Meng   +7 more
doaj   +1 more source

No Evidence Supporting Flare Driven High-Frequency Global Oscillations

, 2012
The underlying physics that generates the excitations in the global low-frequency, < 5.3 mHz, solar acoustic power spectrum is a well known process that is attributed to solar convection; However, a definitive explanation as to what causes excitations in
A. Ambastha, A.C. Donea, A.G. Kosovichev, A.G. Kosovichev, A.G. Kosovichev, B. Kumar, B. Kumar, B. Kumar, B. Kumar, C. Karoff, C.L. Wolff, D.A. Haber, D.C. Braun, F. Hill, F. Hill, J.R. Kennedy, J.R. Kennedy, K. G. Stassun, M. Richardson, R. Howe, R.W. Komm, S. Chakraborty, T. Foglizzo, V.G. Gavryusev   +23 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Space Station Freedom solar array panels plasma interaction test facility [PDF]

, 1989
The Space Station Freedom Power System will make extensive use of photovoltaic (PV) power generation. The phase 1 power system consists of two PV power modules each capable of delivering 37.5 KW of conditioned power to the user.
Martin, Donald F., Mellott, Kenneth D.
core   +1 more source