Results 41 to 50 of about 703 (139)

Review and Analysis of Voltage Clamping Circuits With Low Overvoltage Ratios for DC Circuit Breakers

IEEE Open Journal of the Industrial Electronics Society
Voltage clamping circuits are critical components in most direct-current circuit breakers (dcCBs) to achieve ultrafast dc fault interruptions and an extended lifetime.
Shuyan Zhao, Chunmeng Xu, Lakshmi Ravi, Zhou Dong, Pietro Cairoli   +4 more
doaj   +1 more source

Analysis of metal oxide varistor arresters for protection of multiconductor transmission lines using unconditionally-stable Crank-Nicolson FDTD [PDF]

, 2020
Surge arresters may represent an efficient choice for limiting lightning surge effects, significantly reducing the outage rate of power lines. The present work firstly presents an efficient numerical approach suitable for insulation coordination studies ...
Andreotti, A., Araneo, R., Burghignoli, P., Celozzi, S., Faria, J. B., Lovat, G., Stracqualursi, E.   +6 more
core   +1 more source

High‐Current Cryogenic DC Solid‐State Circuit Breaker for Electric Aircraft

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
Cryogenic and superconducting technologies have great potential to significantly enhance the power density and efficiency of electric propulsion aircraft. This paper presents the design of a 300 V/1700 A DC solid‐state circuit breaker (SSCB) operating at cryogenic temperatures.
Zhongying Wang, Jiawen Xi, Xianwu Zeng, Emelie Nilsson, Jean‐francois Rouquette, Edwin Calderon, Ravi Kiran Surapaneni, Ludovic Ybanez, Xiaoze Pei   +8 more
wiley   +1 more source

Analysis of Surge Propagation with Lightning Arrester using FDTD for 25 kV-AC Transmission Line [PDF]

, 2017
This paper analyzes lightning surge propagation and reflection as the surge arrives at a lightning arrester. Telegraphist equations have been used to characterize the voltage and current of a travelling wave in a lossless power transmission line and ...
Aodsup, K. (Kokiat), Kulworawanichpong, T. (Thanatchai)   +1 more
core  

Impact of converter interface type on the protection requirements for DC aircraft power systems [PDF]

, 2012
The utilization of converter interfaces has the potential to significantly alter the protection system design requirements in future aircraft platforms.
Burt, Graeme, Fletcher, Steven, Galloway, Stuart, Norman, Patrick   +3 more
core   +1 more source

Cryogenic DC Circuit Breaker Based on High‐Power Press‐Pack IGBT

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This paper presents the performance of cryogenically compatible 3.3 kV/1.5 kA PP‐IGBTs as the main circuit breaker in a hybrid circuit breaker. The 3.3 kV/1.5 kA press‐pack IGBT can interrupt currents exceeding 5.1 kA when immersed in a liquid nitrogen bath. PP‐IGBTs are promising candidates for high‐power circuit breakers in cryogenically cooled power
Zhongying Wang, Jiawen Xi, Xianwu Zeng, Stefan Steinhoff, Emelie Nilsson, Jean‐Francois Rouquette, Edwin Calderon, Ravi Kiran Surapaneni, Ludovic Ybanez, Xiaoze Pei   +9 more
wiley   +1 more source

Architecture, Voltage and Components for a Turboelectric Distributed Propulsion Electric Grid [PDF]

, 2015
The development of a wholly superconducting turboelectric distributed propulsion system presents hide unique opportunities for the aerospace industry.
Armstrong, Michael J., Blackwelder, Mark, Bollman, Andrew, Campbell, Angela, Jones, Catherine, Norman, Patrick, Ross, Christine   +6 more
core   +3 more sources

Ageing Behaviours and Mechanisms of SiC MOSFET and Si IGBT in DC Solid‐State Circuit Breaker

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
We propose that this distributed thermal profile in IGBT mitigates localised stress. Conversely, the high concentration of thermal stress in SiC MOSFET's gate region leads to its severe ageing. ABSTRACT The rapid development of DC power systems in applications such as electric aircraft and microgrids has highlighted the need for high‐performance DC ...
Jiajia Song, Bo Zhang, Yanfeng Song
wiley   +1 more source

A voltage-clamped bidirectional fault current limiter based on a three-winding coupled inductor for DC power grids

International Journal of Electrical Power & Energy Systems
The DC fault is a serious challenge to voltage-source-converter-based HVDC (VSC-HVDC) systems, and the fault current limiter (FCL) is one of the key measures to solve the DC fault and reduce the capacity of the DC circuit breaker.
Ziao Yuan, Siyuan Liu, Jinchao Chen, Zhiyuan Liu, Yingsan Geng   +4 more
doaj   +1 more source

A Novel Approach for Mitigating Electrical Losses and Current Unbalance in Low Voltage Distribution Networks

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
In this method, by increasing the degrees of freedom of the unbalanced IEEE 906 bus low‐voltage reference network through load transfer switches, the optimal network configuration is proposed using a meta‐heuristic algorithm to solve this constrained large‐scale optimization problem for the purpose of electrical losses reduction.
Pooya Najafi Zanjani, Shahram Javadi, Mahmood Hosseini Aliabadi, Gevork B. Gharehpetian   +3 more
wiley   +1 more source