Results 11 to 20 of about 8,357 (239)

Research on Ultra-Fast Transient Overvoltage Characteristics of Electric Locomotive

Applied Sciences
Operating overvoltage occurs when the pantograph or main breaker of an electric locomotive is operated, which is prone to causing insulation failure of high-voltage equipment.
Yike Guo, Fuqiang Tian, Hongqi Liu, Yufeng Yin   +3 more
doaj   +2 more sources

Study of Switching Overvoltage Protection Measures for Capacitor Compensation Device

Kongzhi Yu Xinxi Jishu, 2014
The harm of using damping and limiting measures to eliminate switching overvoltage of FC device was analyzed in theory and simulation. It presents that input overvoltage protection mainly depends on the insulation capability of the device and the effect ...
JIANG Jiajiu, DAI Liping, WANG Liguang, SONG Jianxiu, LIU Hanyu   +4 more
doaj   +2 more sources

Study of Power Frequency Overvoltage Suppression on UHV Transmission Line

Kongzhi Yu Xinxi Jishu, 2014
It mainly studied the improvement measures of overvoltage level for UHV transmission line from Jindongnan to Jingmen. It analyzed single-phase grounding load shedding overvoltage and fault-free load shedding overvoltage in the case of the single ...
HAN Mengmeng, WU Wenhui, HUANG Kan, WAN Liqin   +3 more
doaj   +2 more sources

Review and Analysis of Voltage Clamping Circuits With Low Overvoltage Ratios for DC Circuit Breakers

IEEE Open Journal of the Industrial Electronics Society
Voltage clamping circuits are critical components in most direct-current circuit breakers (dcCBs) to achieve ultrafast dc fault interruptions and an extended lifetime.
Shuyan Zhao, Chunmeng Xu, Lakshmi Ravi, Zhou Dong, Pietro Cairoli   +4 more
doaj   +2 more sources

Mechanism and suppression of breaking overvoltage of DC circuit breakers

High Voltage
The occurrence of breaking overvoltage in a DC circuit breaker (DCCB) poses a potential threat to the safe operation of a DC grid. Based on the structure of the ±10 kV three‐terminal DC distribution network, this paper sets up the medium‐voltage DCCB and
Lu Qu, Zhangqing Yu, Zhizheng Gan, Xin Yan, Cheng Jiang, Yulong Huang, Mingshen Li, Jian Feng   +7 more
doaj   +2 more sources

Empowering and conquering infirmity of visually impaired using AI‐technology equipped with object detection and real‐time voice feedback system in healthcare application

CAAI Transactions on Intelligence Technology, EarlyView., 2023
Abstract The Internet of Things is emerging as a crucial technology in aiding humans and making their lives easier. Among the human population, a large percentage of people suffer from disabilities resulting in challenges in everyday life particularly people with visual disabilities.
Hania Tarik, Shahzad Hassan, Rizwan Ali Naqvi, Saddaf Rubab, Usman Tariq, Monia Hamdi, Hela Elmannai, Ye Jin Kim, Jae‐Hyuk Cha   +8 more
wiley   +1 more source

Protection of Solar Power Generation System from Lightning Induced Overvoltage

, 2023
Due to crisis in natural resources and ecological issues, many countries are moving on the road to renewable energy sources. Solar power is the most potential source of renewable energies.
Hossain, MA, Ahmed, MR, Karim, MR
core   +1 more source

CVT-Based Switching Overvoltage Measurement of UHV Converter Station under Complex Electromagnetic Environment

Zhongguo dianli, 2022
UHV converter station is prone to produce switching overvoltage during switching operation, However, due to its high voltage level, strong electromagnetic interference and other factors, there is still no effective means to measure the overvoltage ...
Rong WANG, Jiazhao SHI, Can GUO, Wei SHEN, Xikui MA   +4 more
doaj   +1 more source

Impact of High Switching Speed and High Switching Frequency of Wide-Bandgap Motor Drives on Electric Machines

IEEE Access, 2021
The emergence of fast-switching wide-bandgap (GaN, SiC) power electronics devices has enabled motor drive systems to achieve high efficiency, power density, control bandwidth and high-level of integration.
Yipu Xu, Xibo Yuan, Fei Ye, Zihao Wang, Yonglei Zhang, Mohamed Diab, Wenzhi Zhou   +6 more
doaj   +1 more source

Research on Overvoltage Suppression by Blocking Diode and DC Circuit Breaker in LCC-VSC Hybrid HVDC System

IEEE Access, 2021
In this study, a LCC-VSC hybrid HVDC transmission system was taken as an example. The valve and neutral overvoltage of the hybrid HVDC system were simulated and then calculated at the VSC converter station by installing a blocking diode and a DC circuit ...
Wang Dongju, Zhou Hao
doaj   +1 more source