Results 51 to 60 of about 125 (115)
International Journal of Electrical Power & Energy SystemsThe 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 +4 more
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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. +3 more
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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
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EnergiesSolid-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 +3 more
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A Comprehensive Study on the Quality of Commercially Available Medium Voltage Surge Arresters
IEEE AccessThis 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 +8 more
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IEEE AccessThis 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 +3 more
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IEEE AccessAlthough many snubber circuits have been studied, research on circuits that effectively suppress surge voltage while supporting bidirectional operation remains relatively limited.
Jae-Seong Jo +4 more
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Gaoya dianqi为研究IEEE模型和Pinceti模型对金属氧化物压敏电阻（metal-oxide varistor，MOV）的仿真准确性，以额定电压为150～750 V的6种MOV为对象，理论和试验分析了不同幅值4/10 μs、8/20 μs雷电冲击电流和30/60 μs操作冲击电流下的残压及吸收能量。结果表明，在IEEE模型参数确定中，随操作冲击电流幅值的增大，非线性电阻参考电压取值增大但电感取值减小；在残压预测中，IEEE模型误差为2.6%，较Pinceti模型误差4.6%更准确；在MOV吸收能量估算中 ...
王伟芳 +4 more
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Electromigration Degradation Model of Metal Oxide Varistor Structures
, 2012 Наведено результати моделювання впливу міграції іонів у напівпровідникових кристалітах оксиду цинку при тривалому протіканні робочого електричного струму на вольт-амперні характеристики варисторних структур і визначення умов та параметрів, придатних для контролю процесу їхньої незворотної деградації.
Ivanchenko, A.V., Tonkoshkur, A.S.
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Hypergeometric behavior of metal oxide varistors in DC circuit breakers
Communications in Nonlinear Science and Numerical SimulationYang Liu +6 more
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