Results 101 to 110 of about 2,517,738 (175)

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

Degradación y recuperación de varistores de ZnO

Boletín de la Sociedad Española de Cerámica y Vidrio, 2006
In the present work it was studied the main aspect that influences on degradation and physical-chemical properties at grainboundary region of metal oxide varistors and its consequences on microstructure and nonohmic electric properties.
Ramírez, M. A., Bueno, P. R., Valera, J. A., Márquez, M. A.   +3 more
doaj  

Effects of polyvinyl acetate on the nonlinearity of zinc oxide varistor

, 2008
The effects of polyvinyl acetate (PVA) on the physical and electrical characteristics of Zinc Oxide (ZnO) varistor were investigated. The mass fraction of PVA was varied into different concentrations of 1%, 5%, 8% and 10%.
Herrera, Nerissa T
core  

国际上基于数值仿真计算金属氧化物避雷器的研究进展

Dianci bileiqi, 2018
系统综述了基于数值仿真计算技术在金属氧化物避雷器（metal-oxide surge arresters,MOA）研究中的应用发展。共分3个方面:1)基于等效电路模型的数值仿真计算;2)基于电、机械与热的两或多物理量（场）耦合的金属氧化物电阻片（metal-oxide surge varistor,MOV）数值仿真计算;3)整只MOA的电场、温度场或多物理场耦合的数值仿真计算。对于MOV的建模和仿真计算,将来主要的努力方向是改进数学计算模型,以便可以描述ZnO晶界与时间和温度相关的特性 ...
赵冬一, 李凡, 汤霖
doaj  

Integrated Damping Solid-State Circuit Breaker for Inrush Current Suppression in DC Microgrids with Reconfigurable Voltage Sources

Energies
Solid-state circuit breakers (SSCBs) provide fast, arcless fault clearance, resulting in a longer service life compared to mechanical circuit breakers (MCBs) in DC grids.
Hans Vincent Lianto, Amer M. Y. M. Ghias, Volkert Pickert, Mohamed H. M. Sathik   +3 more
doaj   +1 more source

The behaviour and performance of metal oxide varistor under the application of multiple lightning impulses [PDF]

, 2005
The behaviour and performance of lightning protective devices such as the metal oxide varistor (MOV) under the application of multiple lightning impulse are different from that of the standard single stroke test.
Yaacob, Mohd. Muhridza
core  

A Comprehensive Study on the Quality of Commercially Available Medium Voltage Surge Arresters

IEEE Access
This paper presents a comprehensive study on the quality and reliability of commercially available medium voltage surge arresters, with particular emphasis on their electrical performance and structural degradation under aging conditions.
Kuba Wojcik, Marek Olesz, Leszek S. Litzbarski, Stanislaw Wojtas, Michal J. Winiarski, Daniel Jaworski, Marcin Lapinski, Pawel Lawniczak, Bartlomiej Andrzejewski   +8 more
doaj   +1 more source

薄膜バリスタ [PDF]

, 1966
Voltage and current characteristics of metal-oxide-metal thin film varistor prepared by vacuum evaporation method are discussed with the theory of R. Stratton on tunneling currents through thin insulating films.
山口, 勝也, 大久保, 明伸
core  

DC-SSCB Snubber for Electric Propulsion Ships With Effective Surge Voltage Reduction and Fast Dissipation of Fault Current Energy

IEEE Access
This paper proposes a snubber circuit for SSCB that performs voltage clamping operation in two stages to reduce surge voltage. The surge voltage is suppressed in the first stage using a MOV with low operating initiation and clamping voltages.
Jae-Hun Cha, Guangxu Zhou, Sung-Geun Song, Feel-Soon Kang   +3 more
doaj   +1 more source

A DC SSCB With Range-Limited Parallel Operation Switches and a Snubber Circuit Utilizing Inverse Current Injection

IEEE Access
Although many snubber circuits have been studied, research on circuits that effectively suppress surge voltage while supporting bidirectional operation remains relatively limited.
Jae-Seong Jo, Sun-Pil Kim, Sang-Hyeok Lee, Sung-Geun Song, Feel-Soon Kang   +4 more
doaj   +1 more source