Results 51 to 60 of about 1,496 (223)
Surface Micro‐Discharge Plasma for Multiple Teeth Bleaching: Efficacy, Mechanism and Safety
High Voltage, EarlyView.ABSTRACT Hydrogen peroxide (H2O2) is the commonly‐used bleaching chemical in clinical practice, but its excessive concentrations can cause tooth damage. Atmospheric pressure cold plasma is considered a promising new technique for tooth bleaching. Surface micro‐discharge (SMD) devices can generate large‐scale plasma, which holds potential for treating ...
Ruike Chen +7 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT Large‐capacity generator circuit breaker (GCB) based on vacuum interrupter technology is the key power equipment to ensure the safe operation of the power system. When the short‐circuit current was forced to cross zero, the large‐capacity GCB was difficult to generate a zero‐voltage environment through freewheeling, the vacuum interrupter (VI)
Xiangyu Han +8 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT Currently, limited research exists on the structural response and protection methods of the converter transformer tank for ± 800 kV ultra‐high voltage direct current transmission project to high energy arc faults. This research investigates the dynamic response and the vulnerable areas of the ultra‐high voltage converter transformer under the ...
Ke Wang +5 more
wiley +1 more source
Coordinated control of DC circuit breakers in multilink HVDC grids [PDF]
, 2023 High voltage DC grid is developing towards more terminals and larger transmission capacity, thus the requirements for DC circuit breakers (DCCB) will rise.
Zhao, Xibei +4 more
core +1 more source
Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives
High Voltage, EarlyView.ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu +4 more
wiley +1 more source
Current Flow Controlling Hybrid DC Circuit Breaker [PDF]
IEEE Transactions on Power Electronics, 2018 © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component
Mokberdoran, Ataollah +3 more
openaire +3 more sources
Optimizing the roles of unit and non-unit protection methods within DC microgrids
, 2012 The characteristic behavior of physically compact, multiterminal dc networks under electrical fault conditions can produce demanding protection requirements.
Burt, Graeme +4 more
core +1 more source
Short-Circuit Fault Current Modeling of a DC Light Rail System with a Wayside Energy Storage Device
Energies, 2022 This paper proposes a simulation model to calculate short-circuit fault currents in a DC light rail system with a wayside energy storage device. The simulation model was built in MATLAB/Simulink using the electrical information required to define a ...
Petru Valentin Radu +3 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang +7 more
wiley +1 more source
Switching characteristics of hybrid low voltage DC circuit breakers
, 2018 For a secure and reliable operation circuit breakers (CB’s) are key components in the power grid. Facing the upcoming developments in the power grid with integration of DC technologies, hybrid circuit breakers (HCB’s) will play an important role. Studies
Alija, Muhamet +3 more
core +1 more source