Results 11 to 20 of about 9,842,775 (252)

Underground power supply system grounding fault section positioning method based on wide-area current transient component

Gong-kuang zidonghua, 2022
At present, most of the research on underground power supply system grounding fault positioning in coal mine adopts the transient method, which needs to collect zero sequence voltage and zero sequence current of the line at the same time.
OUYANG Min, DU San'en, LI Wenjun, HOU Gang, XUE Zhongxin, YANG Feiwen, GAO Bin, FAN Shengjun, WANG Feng, MAO Hao, HAN Peiqiang   +10 more
doaj   +2 more sources

Fault Section Location Based on Transient Zero-Sequence Current Waveform Dissimilarity for Single-Phase Grounding Faults in Distribution Networks

Energies
A fault-section location method based on waveform-difference analysis of transient zero-sequence currents is proposed for distribution networks with small-current grounding systems.
Yuxing Lei, Bo Li, Yingjie Yin, Ling Wei, Jiao Sun, Zhensheng Wu   +5 more
doaj   +2 more sources

Research on a Faulty Line Selection Method Based on the Zero-Sequence Disturbance Power of Resonant Grounded Distribution Networks

Energies, 2019
For fast and accurate faulty line selection (FLS) in single phase-to-ground (SPG) faults for resonant grounded distribution networks (RGDNs), this paper proposes a FLS method based on zero-sequence power characteristics.
Wenquan Shao, Jie Bai, Yuan Cheng, Zhihua Zhang, Ning Li   +4 more
doaj   +2 more sources

Management of Zero-Sequence Parameters for Earth Faults on the Power Receiver’s Side in IT-Type Networks

Energies
This study examines the behavior and control of zero-sequence parameters in IT-type electrical networks under conditions of capacitive insulation asymmetry and complex asymmetric faults on the power receiver side.
Gennadiy Pivnyak, Yurii Stepanenko, Kinga Stecuła, Maryna Kyrychenko, Oleksandra Lysenko, Roman Dychkovskyi   +5 more
doaj   +3 more sources

Transient Characteristics and Line Selection of Two-Point Grounding Faults on Same Phase in Resonant Grounding System

Zhongguo dianli, 2022
Aiming at the low accuracy problem in line selection of two-point grounding faults on same phase in distribution network, a new fault feeder identification method suitable for two-point grounding faults on same phase in resonant grounding systems is ...
Yingtong LIU, Chun HUANG, Jingbo YUAN, Sen YAN   +3 more
doaj   +1 more source

Combined line selection of single-phase grounding faults considering harmonic injection of distributed powers

电力工程技术, 2023
With the improvement of the requirements for the safe operation of distribution network lines, the harmonics injected by distributed power generation make the existing line selection methods ineffective, and the fault line selection method with a single ...
LI Yan, ZHAO Ying, DU Lei, XU Tianqi, TIAN Ye   +4 more
doaj   +1 more source

An improved Hausdorff distance method for locating single phase to ground fault in neutral non‐effectively grounded system

IET Generation, Transmission & Distribution, 2021
Neutral non‐effectively grounded mode is widely used in medium‐voltage distribution networks in China. When a single‐phase grounding fault occurs in distribution networks, abundant transient signals will be generated.
Wenhao Wu, Xinhui Zhang, Jun Zhang, Yu He, Wenyuan Bai   +4 more
doaj   +1 more source

On minimizing maximum transient energy growth [PDF]

, 2005
The problem of minimizing the maximum transient energy growth is considered. This problem has importance in some fluid flow control problems and other classes of non-linear systems.
Whidborne, James F., Steer, Anthony J., McKernan, John   +2 more
core   +7 more sources

IMPROVING THE EFFICIENCY OF FAULT PROTECTION SYSTEMS OF ELECTRICAL GRIDS BASED ON ZERO SEQUENCE VOLTAGES AND CURRENTS WAVELET TRANSFORMS

Electrical engineering & Electromechanics, 2020
Introduction. A significant proportion of earth faults in medium voltage networks represents a short-lived and transient process. Problem. In such cases, earth fault protection that responds to steady-state current and voltage is not able to operate ...
V. F. Syvokobylenko, V. A. Lysenko
doaj   +1 more source

IEC 61850-Based Centralized Protection against Single Line-To-Ground Faults in Ungrounded Distribution Systems

Energies, 2021
We developed an International Electrotechnical Commission (IEC) 61850-based centralized protection scheme to prevent single line-to-ground (SLG) faults in the feeders and busbars of ungrounded distribution systems.
Soon-Ryul Nam, Woong-Hie Ko, Sopheap Key, Sang-Hee Kang, Nam-Ho Lee   +4 more
doaj   +1 more source