Results 31 to 40 of about 1,140 (275)

Fault location of single-phase grounding fault based on Manhattan average distance and cosine similarity in distribution network

电力工程技术, 2023
Aiming at the problem of insufficient sensitivity of existing fault location methods when single-phase grounding fault occurs in resonant grounding system of active distribution network, a fault location algorithm based on Manhattan average distance and ...
TAO Weiqing, LI Xueting, HUA Yuting, XIAO Songqing, WU Yan, ZHANG Yingjie   +5 more
doaj   +1 more source

Identification of Single-Phase Line Break Fault Direction Based on Local Voltage Information in Small Current Grounding System Considering the Impact of DG

IEEE Access, 2023
Line break faults commonly occur in distribution networks and pose the risk of electric shocks to nearby individuals and animals. This study aims to address the challenge of identifying the direction of a line break fault.
Fan Yang, He Li, Wei Hu, Yang Lei, Hechong Chen, Yongduan Xue   +5 more
doaj   +1 more source

Fault line selection method for coal mine power grid based on RCMDE and KFCM

Gong-kuang zidonghua, 2022
It is difficult to accurately select the fault line when the single-phase ground fault occurs in the coal mine power grid with the widely used resonant grounding system.
HAN Guoguo, SHI Xiaojun, WANG Hui, CHENG Weijian, MU Yanxiang   +4 more
doaj   +1 more source

Fault Identification Technology of 66 kV Transmission Lines Based on Fault Feature Matrix and IPSO-WNN

Applied Sciences, 2023
Due to the barely resonant earthed system used in the transmission line, it is more challenging to identify faults at a 66 kV voltage level because of insufficient fault identification techniques.
Qi Zhang, Minzhen Wang, Yongsheng Yang, Xinheng Wang, Entie Qi, Cheng Li   +5 more
doaj   +1 more source

Optical Feshbach resonances and ground-state-molecule production in the RbHg system [PDF]

Physical Review A, 2017
We present the prospects for photoassociation, optical control of interspecies scattering lengths and finally, the production of ultracold absolute ground state molecules in the Rb+Hg system. We use the "gold standard" ab initio methods for the calculations of ground (CCSD(T)) and excited state (EOM-CCSD) potential curves.
Borkowski, Mateusz, Rodriguez, Rodolfo Muñoz, Kosicki, Maciej B., Ciuryło, Roman, Żuchowski, Piotr S.   +4 more
openaire   +2 more sources

Small Antenna Design of Triple Band for WIFI 6E and WLAN Applications in the Narrow Border Laptop Computer

International Journal of Antennas and Propagation, 2021
This paper presents the design of a small antenna for use in a wireless local area network (WLAN) and Wi-fi 6E on a narrow-border laptop. The dimensions of the antenna are 43 × 3 × 0.4 mm3, and it features a grounding system simulated by a 200 × 260 mm2 ...
Wei-Chiang Jhang, Jwo-Shiun Sun
doaj   +1 more source

Research of characteristics of transient pulse in coal mine resonant grounding system

Gong-kuang zidonghua, 2014
By means of deduction of zero-sequence current expressions when single-phase grounding fault occurs in single substation mode and multi-substation mode of coal mine resonant grounding system, polarity relationship between transient pulse of fault line ...
WANG Jinhong
doaj   +1 more source

Faulty Feeder Detection Method Based on VMD–FFT and Pearson Correlation Coefficient of Non-Power Frequency Component in Resonant Grounded Systems

Energies, 2020
Through analyzing the transient components and transient characteristics in transient zero-sequence current (TZSC), a novel fault feeder detection method based on the transient correlation of non-power frequency components (NPFCs) for the resonant ...
Kewen Wei, Jing Zhang, Yu He, Gang Yao, Yikun Zhang   +4 more
doaj   +1 more source

Faulty Feeder Detection Based on Grey Correlation Degree of Adaptive Frequency Band in Resonant Grounding Distribution System

, 2023
Due to the particularity of their process, petrochemical enterprises have high requirements for the reliability of power supply. If a large-scale blackout occurs due to a grounding fault, it will pose a huge threat to safe production.
Xuan Zhou, Yanwen Wang, Zhiming Hu, Xueqian Han, Jiyuan Cao   +4 more
core   +1 more source

Ferromagnetic resonance over-voltage identification method based on Gram angle field

Energy Reports, 2022
In neutral point non-grounding systems with 35 kV and below, ferromagnetic resonance over-voltage faults often occurs, which brings safety hazards to power systems.
Qiong Li, Yang Zou, Guo Hua Long, Wenbao Wu   +3 more
doaj   +1 more source