Results 31 to 40 of about 1,562 (203)
GaN HEMTs in High-Frequency Overvoltage Switching: Electrical or Thermal Failure?
, 2023 GaN high-electron-mobility transistors (HEMTs) have no avalanche capability and are known to fail electrically when the transient overvoltage reaches their dynamic breakdown voltage (BVDYN).
Li, Qiang +3 more
core +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 +4 more
wiley +1 more source
Zhejiang dianli, 2023 Grid-connected offshore wind farms are likely to cause harmonic resonances in the power system that jeopardize the safe operation of the power grid. To this end， the impact of grid-connected offshore wind farms on the transient overvoltage and harmonic ...
XU Qunwei +6 more
doaj +1 more source
IET Generation, Transmission & Distribution, 2021 In transmission lines, shunt‐reactors are commonly applied to counteract the “Ferranti effect.” However, in highly compensated lines, hazardous overvoltage may occur during unbalanced open‐phase conditions.
Chen Xiaoyue +6 more
doaj +1 more source
Comparison of motor neutral point overvoltage oscillations in SiC-based adjustable speed drives using two-level and three-level inverters [PDF]
, 2022 In SiC-based adjustable speed drives, power cables have similar behaviour to transmission lines due to the steep voltage pulses (high dv/dt) which experience back and forth voltage reflections while travelling across the cables, known as the reflected ...
Wenzhi Zhou (6575999) +2 more
core +2 more sources
The Journal of Engineering, 2019 In the hierarchically connected ultra-high voltage (UHV) DC projects, the minimum air clearance on the 1000 kV AC side of converter transformer directly affects the layout and area of the valve hall.
Lou Ying +3 more
doaj +1 more source
Substation reliability evaluation in the context of the stability prediction of power grids [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2020 The aim of the presented work was to examine the reliability assessment model on the example of a selected power grid object. The analyzed object was tested based on assumptions about technological breaks that were caused by overvoltage, among others ...
M. Borecki +3 more
doaj +1 more source
Journal of Physics: Conference Series, 2023 Abstract Since power-frequency overvoltages can influence the safe operation of the submarine cable transmission system greatly, it is indispensable to calculate the overvoltages that may occur during actual situations. In this study, the power-frequency overvoltages of the offshore oil-gas field group’s submarine cable transmission ...
Wei Duan +6 more
openaire +1 more source
, 2019 As one part of the power system, high-temperature superconducting (HTS) cables may be subject to various system faults, such as overvoltage. When overvoltage occurs, HTS cables may quench and the resistance of HTS tapes will increase rapidly, which will ...
Jianwei Li +3 more
core +1 more source
High Voltage, 2022 The large leakage current of the roof arrester caused by the high‐frequency resonant overvoltage on the high‐speed train occurs intermittently, which will cause the arrester to overheat locally.
Jixing Sun +7 more
doaj +1 more source