Results 31 to 40 of about 1,013 (174)

Research on influencing factors of arc grounding over-voltage in mine power supply system

Gong-kuang zidonghua, 2017
In order to comprehensively study influence factors such as grounding resistance, line resistance, fault location, grounding capacitance, interphase capacitance and arc ignition time on arc grounding over-voltage in mine power supply system, typical mine
LIU Jucai, GENG Pulong, QU Bingni, SONG Jiancheng, LUO Chao, LI Yongxue, YUAN Leiming   +6 more
doaj   +1 more source

Harmonic Overvoltage Analysis of Electric Railways in a Wide Frequency Range Based on Relative Frequency Relationships of the Vehicle–Grid Coupling System

Energies, 2020
Harmonic overvoltage in electric railway traction networks can pose a serious threat to the safe and stable operation of the traction power supply system (TPSS).
Qiujiang Liu, Binghan Sun, Qinyao Yang, Mingli Wu, Tingting He   +4 more
doaj   +1 more source

Influence of Connecting Cables on Stator Winding Overvoltage Distribution under High-Frequency Pulse Width Modulation

Applied Sciences
In the variable frequency motor drive system, because the cable impedance does not match the motor impedance, the reflection wave of the voltage wave will be generated.
Shifu Zhang, Fuqiang Tian, Shulin Li, Hongqi Liu, Dahu Cheng, Yudi Li   +5 more
doaj   +1 more source

Research on VFTO Identification of GIS Based on Wavelet Transform and Singular Value Decomposition

Energies, 2022
The accurate identification of Very Fast Transient Overvoltage (VFTO) is the key of overvoltage control in modern smart grids. In order to accurately identify VFTO generated by the operation of a disconnector in Gas Insulated Substation (GIS), a VFTO ...
Gang Xiao, Quansen Rong, Miaoran Yang, Peng Xiao, Qihong Chen, Junzhe Fan, Haoran Guo, Haonan Wang   +7 more
doaj   +1 more source

Analysis and suppression of operational overvoltage and inrush current for high‐speed trains by automatic phase‐switching technique

High Voltage
When a high‐speed train approaches the insulated phase‐splitting section embedded between neighbouring power supply arms, the vacuum circuit breaker (VCB) installed on trains must be disconnected to maintain the traction power supply system as a no‐load ...
Ye Cao, Song Xiao, Zhizong Ye, Guangning Wu, Yujun Guo, Guoqiang Gao, Chuanming Sun, Jiancheng Liu, Zheng Chen, Hao Hou, Zijing Wang, Puyang Liu, Yuhui Zhang, Jie Yu   +13 more
doaj   +1 more source

Tower Air-gaps discharge characteristics and insulation coordination for UHV AC double-circuit line

The Journal of Engineering, 2019
In order to give out inverse V-type insulator tower air-gaps configuration of double-circuit UHV AC power transmission line, different distance air-gaps from high-voltage electrode to tower frame discharge tests of inverse V-string are carried out ...
Huo Feng, Nan Jing, Ye Qiming, Ma Yeming
doaj   +1 more source

Study on the impact of AC system operating frequency elevation on overvoltage characteristics and equipment insulation levels of converter stations

Zhejiang dianli
The economic advantages of medium-frequency AC collection and flexible DC transmission make it a key choice for deep-sea wind power development， where overvoltage and insulation coordination emerge as critical technical bottlenecks.
YE Wenyao, LU Yi, QIAN Zhengxu, XU Feng, LU Chengyu, ZHANG Zheren, XU Zheng   +6 more
doaj   +1 more source

Overvoltage Simulation Analysis and Suppression of Breaking in a 35 kV Shunt Reactor

Energies
When a 35 kV distribution network has the problem of insufficient reactive power, the input of a shunt reactor is a common compensation method. Vacuum circuit breakers are widely used in 35 kV distribution networks because of their superior arc ...
Jing Chen, Xiaoyue Chen, Siying Feng, Xinmeng Liu, Qin Liu   +4 more
doaj   +1 more source

Two-Stage Optimal Configuration Strategy of Distributed Synchronous Condensers at the Sending End of Large-Scale Wind Power Generation Bases

Energies
The transmission end of large-scale wind power generation bases faces challenges such as high AC-DC coupling strength, low system inertia, and weak voltage support capabilities.
Lang Zhao, Zhidong Wang, Yizheng Li, Xueying Wang, Zhiyun Hu, Yunpeng Xiao   +5 more
doaj   +1 more source

Design of Hybrid Control Algorithm for Fault Ride-Through of Photovoltaic System

IEEE Access, 2019
This paper proposes a novel control algorithm to enhance the fault ride-through (FRT) capability of a photovoltaic (PV) system. In this method, the overcurrent of the grid-tied inverter is suppressed to a preset value using model current predictive ...
Feng Zheng, Yiqiang Chen, Tao Ye, Yachao Zhang, Fang Guo, Yi Zhang   +5 more
doaj   +1 more source