Results 1 to 10 of about 978,622 (297)

High Resistance Grounding Fault Perception and Identification Method in Asymmetric Distribution Network

Zhongguo dianli
Aiming at the problems of fault perception and identification in high resistance grounding fault of distribution network, a high resistance grounding fault perception method for parameter-asymmetric distribution network based on damping rate variation is
Penghui YANG, Guochao QIAN, Hao BAI, Hongwen LIU, Wanxian YANG, Xiao SHI   +5 more
doaj   +1 more source

Design of Grounding Grid for Main Substations in High Soil Resistivity Areas Based on CDEGS Software

Chengshi guidao jiaotong yanjiu
Objective To address the difficulty of reducing the grounding resistance of main substations in high soil resistivity areas, it is necessary to study the design of grounding grids for main substations in such regions.
CAO Jianshe
doaj   +1 more source

A grounding method of OCS pillar foundation based on conductive concrete

机车电传动, 2023
A grounding method of OCS pillar foundation based on conductive concrete was proposed to solve the grounding problem of traction power supply system in areas with high soil resistivity. The proportioning of materials for conductive concrete was optimized
CHANG Zhanning, ZHANG Yiping, YU Shudan, XIE Zining, LU Weinan, CHENG Hongbo   +5 more
doaj  

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

Analysis of fault current and overvoltage at the neutral point of ±800 kV High-Voltage DC converter transformer

Energy Reports, 2022
In order to enhance the security of ±800 kV High-Voltage DC (HVDC) system, it is needed to consider and analyze the grounding mode of the neutral point of converter transformer.
Jiaqing Fu, Yang Han, Ping Yang, Congling Wang, Amr S. Zalhaf   +4 more
doaj   +1 more source

Refined Diagnosis Method for Disconnected High-Resistance Grounding Faults in Medium-Voltage Distribution Lines

Zhongguo dianli
Multiple voltage drops or abnormal currents may occur in the power system, resulting in significant deformation and fluctuation of fault signal characteristics related to the medium voltage DC distribution network, exceeding the normal fluctuation range,
Peng ZHENG, Pengcheng HAN, Guodong WANG, Ying LOU   +3 more
doaj   +1 more source

Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes

Energies, 2022
High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes.
Amr S. Zalhaf, Ensheng Zhao, Yang Han, Ping Yang, Abdulrazak H. Almaliki, Reda M. H. Aly   +5 more
doaj   +1 more source

Feasibility Analysis of Application of HX Series Electric Locomotive Under Ground Fault Mode

机车电传动, 2021
Three grounding fault detection schemes of HX series electric locomotives were introduced, and it was evaluated whether there were potential electrical safety hazards when single point grounding occured in different grounding ranges under different ...
Yanmin ZHANG, Fengrong HAO, Guangxing TIAN, Ying FU, Baosheng SUN, Jianlong CHEN   +5 more
doaj  

Research on selective leakage protection of 10 kV system based on transient characteristic parameters in coal mine

Meikuang Anquan, 2022
When a single-phase grounding fault occurs in the coal mine 10 kV power supply system, due to the low sampling frequency of the system, the traditional transient line selection method is easy to lose the “line selection information”, and is greatly ...
GUO Runshou, CAO Jiyuan
doaj   +1 more source

Fault Protection Based on the Ratio of Zero-sequence Current Projection Components for Low-resistance Grounding System

Taiyuan Ligong Daxue xuebao, 2021
The electrical characteristics of a single-phase grounding fault in a low-resistance grounding system was aualyzed, and a fault protection scheme was proposed for low-resistance grounding systems according to the ratio of the zero-sequence current ...
Yuan NIU, Wenping QIN, Fuliang XIA, Xin SHANGGUAN, Pengfei ZUO   +4 more
doaj   +1 more source