Results 11 to 20 of about 13,467 (221)

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

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

Harmonic elimination of a fifteen‐level inverter with reduced number of switches using genetic algorithm

IET Power Electronics, EarlyView., 2023
This article presents a Fifteen‐level inverter topology that has a lesser number of switches (12) and can accommodate isolated DC sources. The total harmonic elimination (THD) of the proposed topology using genetic algorithm is within the IEEE 519 standards. Further, the fifteen‐level inverter is implemented in Hardware and firing pulses were generated
Yogesh Joshi, Shimi Sudha Letha, Farhad Ilahi Bakhsh, Gopal Lal Jaat, Suyash Tilak   +4 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

Resonance overvoltage control algorithms in long cable frequency conversion drive based on discrete mathematics

Open Physics, 2020
In order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance ...
Deng Yonghong, Zhang Quanzhu
doaj   +1 more source

Coupling Relationship Between Wind Power Grid-connected Power and DC Transmission Power with DC Block Fault

Zhongguo dianli, 2021
China's primary energy production bases and load centers are inversely distributed and the renewable energy of the production base cluster is delivered through UHVDC cluster, so the coupling characteristics of wind power and DC are complex in the power ...
Zhaohui QIE, Zhaowei LI, Weizhou WANG, Wei LI, Xianbo KE   +4 more
doaj   +1 more source