Results 41 to 50 of about 3,739,031 (335)

A Local Protection and Local Action Strategy of DC Grid Fault Protection

Energies, 2020
Fast detection and isolation of direct current (DC) faults are key issues for DC grids. Therefore, it is very necessary to study the fault protection principle for DC grids. This paper firstly presents the main difficulties in DC fault protection.
Jingqiu Yu, Zheren Zhang, Zheng Xu
doaj   +1 more source

A novel protection scheme for an LVDC distribution network with reduced fault levels [PDF]

, 2017
Low Voltage Direct Current (LVDC) distribution is one of the new promising technologies that have the potential to accelerate the wider integration of distributed renewables.
Burt, Graeme, Emhemed, Abdullah, Wang, Dong   +2 more
core   +1 more source

A review on protection of DC microgrids

Journal of Modern Power Systems and Clean Energy, 2018
The DC microgrid has become a typical distribution network due to its excellent performance. However, a well-designed protection scheme still remains a challenge for DC microgrids.
Lin ZHANG, Nengling TAI, Wentao HUANG, Jian LIU, Yanhong WANG   +4 more
doaj   +1 more source

Ordinal dose-response modeling approach for the phthalate syndrome

Environment International, 2020
Background: The phthalate syndrome (PS) is a collection of related male reproductive developmental effects, ranging in severity, that have been observed in rats after gestational exposure to developmentally-toxic phthalates. For statistical purposes, the
Todd D. Blessinger, Susan Y. Euling, Lily Wang, Karen A. Hogan, Christine Cai, Gary Klinefelter, Anne-Marie Saillenfait   +6 more
doaj   +1 more source

Analysis and hardware testing of cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters [PDF]

, 2015
This paper focuses on the behaviour of the cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. Active switches, not designed for fault conditions, are tripped to minimize discharge currents effect on the ...
Aboushady, A.A., Ahmed, K.H., Jovcic, D.
core   +2 more sources

An optimal protection scheme for spatially distributed UHVDC transmission systems

Zhejiang dianli
Spatially distributed UHVDC transmission systems eliminate the need for AC transmission lines converging at a converter station by enabling DC power transmission at remote locations.
HU Yunpeng, TANG Jun, ZHANG Jianfeng, ZHANG Yiyong, ZHANG Jing, WANG Junsheng   +5 more
doaj   +1 more source

ROCOV scheme for Fault Detection and Location in HVDC sytems [PDF]

, 2019
A reliable DC fault protection system is essential for the development of HVDC grids. Therefore, this paper deals with the voltage derivative ROCOV scheme to locate and detect DC faults.
Abarrategi, O., Díaz, J., Larruskain, D.M., Perez-Basante, A., Rubio, A.   +4 more
core   +2 more sources

Development of New Protection Scheme in DC Microgrid Using Wavelet Transform

Energies, 2022
The demand for a low voltage direct current (LVDC) microgrid is increasing by the increase of DC-based digital loads and renewable resources and the rapid development of power electronics technology.
H. Seo
semanticscholar   +1 more source

Peace, Prosperity and Safety Nets in Timor‐Leste: Competing Priorities or Complementary Investments?

Asia & the Pacific Policy Studies, 2014
Social protection cash transfers are a vital policy instrument in tackling poverty, and provide an affordable, broad‐based foundation for inclusive growth and social stability.
Pamela Dale, Lena Lepuschuetz, Nithin Umapathi   +2 more
doaj   +1 more source

DC Microgrid Protection in the Presence of the Photovoltaic and Energy Storage Systems [PDF]

Journal of Operation and Automation in Power Engineering, 2018
In recent years, most of the loads and distributed generations are connected to the AC grid through the power electronic converters. Using the DC grid beside the AC grid can reduce the conversion stages and power losses.
K. Mazlumi, A. Shabani
doaj   +1 more source