Results 1 to 10 of about 966 (139)

The evolution characteristics of leakage current in traction network surge arresters under complex operating conditions [PDF]

Scientific Reports
Due to frequent load fluctuations, significant impacts, and substantial harmonic distortion on heavy-load railways, leakage currents monitored by surge arresters exhibit considerable variation.
Wang Pengxiong, Feng Lifeng, Gao Yongqiang, Tian Fuqiang   +3 more
doaj   +2 more sources

Internal Overvoltage Identification of Distribution Network via Time-Frequency Atomic Decomposition

IEEE Access, 2019
Internal overvoltage accidents in the distribution network are likely to cause an equipment insulation breakdown and result in system power outages and economic losses.
Wei Gao, Rong-Jong Wai, Yu-Fei Liao, Mou-Fa Guo, Yan Yang   +4 more
doaj   +3 more sources

Simulation and Experimental Research on Overvoltage Measurement of Hybrid CVT [PDF]

E3S Web of Conferences, 2021
The CVT equipment running on site is slightly modified to form a hybrid CVT to achieve transient overvoltage measurement, which is theoretically feasible and practical.
Nie Yu, Zhang Guoqing, Song Jiakuo, Wang Guizhong   +3 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

Propagation Characteristics and Identification of High-Order Harmonics of a Traction Power Supply System

Energies, 2022
High-order harmonics in the traction power supply show negative effects on the safe and stable operation of the railway transportation system. There is a fixed resonant frequency in the traction network.
Miaoxin Jin, Yuehuan Yang, Jiapeng Yang, Mingli Wu, Ganghui Xie, Kejian Song   +5 more
doaj   +1 more source

High-Frequency Modeling and Filter Design for PWM Drives with Long Cables

Energies, 2021
Aiming at the problems emerging in a pulse width modulation (PWM) drive system with long cables, the accurate modeling of power cables is the premise for predicting and analyzing these relevant phenomena, and a proper filter design is the key solution to
Lei Wang, Yifan Zhang, Muhammad Saqib Ali, Guozhu Chen, Josep M. Guerrero, Juan C. Vasquez   +5 more
doaj   +1 more source

Investigation of a Low-Speed Commutation Voltage Shock Problem in Three-Level ANPC Inverter with Hybrid Modulation Mode

Machines, 2023
With the development of the photovoltaic industry; there will be an increasing demand for efficient, high-power density, and low-cost grid interface converters.
Jian Yu, Renhui Shen, Le Zhou, Zelin Jia, Yulong Hao   +4 more
doaj   +1 more source

Study on internal overvoltages of 220 kV submarine cable transmission system of the offshore oil–gas field group

Energy Reports, 2022
Since the Electromagnetic Transient (EMT) process of the high-voltage submarine cable has a great influence on the safe and stable operation of the transmission system, it is necessary to analyze its EMT process under actual engineering.
Han Li, Peixin Yu, Shurong Li, Junbo Deng   +3 more
doaj   +1 more source

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

Optimization of Reactive Power Configuration for Offshore Wind Farms

Zhongguo dianli, 2020
According to the reactive power configuration principles of offshore wind farms, this paper analyzes the reactive power losses of offshore wind farms, mainly consisting of wind turbines, submarine cables and main transformers.
Yuan YANG, Xi YANG, Jiangping TAN, Liang CHEN, Yanli XIN, Xia CHEN   +5 more
doaj   +1 more source