Results 11 to 20 of about 641,410 (267)

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

Energies, 2022
High-speed EMUs (electric multiple-units) frequently pass through the phase-separation zone during operation. Overvoltage generated during the operation of the vehicle-mounted circuit breaker has a long duration and high waveform steepness, which ...
Jixing Sun, Kaixuan Hu, Yongzhi Fan, Jiyong Liu, Shengchun Yan, Yan Zhang   +5 more
doaj   +2 more sources

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   +2 more sources

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

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

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

Interconnection Control of Electronic Frequency Converters to Prevent Overvoltage Caused by Three-Phase Unbalanced Power

IEEJ Transactions on Industry Applications
Toshimasa Shimizu, Ken Kunomura, Hiroshi Moriyama, Yuto Uchiyama   +3 more
openaire   +2 more sources

Insulator fault feature extraction system of substation equipment based on machine vision

IET Networks, EarlyView., 2022
Abstract The artificial intelligence technology and intelligent automation are more and more widely used, the insulators play a supporting and insulating role in the operation of the grid. The use of machine vision inspection technology to detect insulator faults has become an inevitable trend of the times.
Keruo Jiang, Qiaoqun Xia, Lijun Ma, Xin Xu, Zhipeng Shao   +4 more
wiley   +1 more source