Results 11 to 20 of about 10,715 (249)

Switching overvoltages in offshore wind power grids [PDF]

, 2011
Koblingstransienter i møller, opsamlingsnet, transmissionssystem samt i det eksterne net i havmølleparker både under normal og uregelmæssig drift er de vigtigste fænomener i isolationskoordineringsstudier. De modeller og metoder, som internationale standarder og retningslinjer anbefaler, er dog mangelfulde i relation til de specielle forhold, der gør ...
Arana Aristi, Ivan
openaire   +3 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

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

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

Peducing the frequency of switching overvoltage in generator networks

Известия высших учебных заведений: Проблемы энергетики
THE PURPOSE of the study is to study the problem of switching overvoltages in 10 kV generator networks. Using the Matlab Simulink package, create a model of common auxiliaries of a 10/0.4 kV power station, calculate the overvoltage at different sections ...
R. A. Belsky, V. Y. Frolov, R. I. Zhiligotov, E. P. Safonov   +3 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

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

Transformer modelling for switching overvoltages

Proceedings. Joint International Power Conference Athens Power Tech,, 2005
B.C. Papadias, N.D. Hatziargyriou, J.M. Prousalidis   +2 more
openaire   +2 more sources

Overvoltages during switching operations of vacuum switching devices [PDF]

Zbornik radova, Elektrotehnicki institut Nikola Tesla, 2013
This paper presents the results of experimental studies of voltage phenomena in the switching operations of vacuum switching devices made by various manufacturers in several different configurations of 6 kV, 10 kV, 20 kV and 35 kV networks. During switching-on operations of the inductive loads, re-ignition of the electric arc between the contacts of ...
Vukelja Petar, Naumov Radomir, Mrvić Jovan, Hrvić Dejan   +3 more
openaire   +2 more sources

Modeling and enhanced control of hybrid full bridge–half bridge MMCs for HVDC grid studies [PDF]

, 2020
Modular multilevel converters (MMCs) are expected to play an important role in future high voltage direct current (HVDC) grids. Moreover, advanced MMC topologies may include various submodule (SM) types. In this sense, the modeling of MMCs is paramount
Forner, Jaume, Vidal-Albalate, Ricardo
core   +1 more source