Results 31 to 40 of about 78,542 (219)
Noise Characteristics of ±800 kV HVDC Convert StationBased on Spectrum Analysis
Zhongguo dianli, 2019 By collecting the sound pressure signals of the aerodynamic noise of the converter transformer fans, the electric field noise of the smoothing reactors and the electric field noise of the DC/ AC filter field in the 800 kV converter station, the spectrum ...
Yu HAN, Chao FAN, Guangke WANG, Qiang HE
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Advanced Engineering Materials, EarlyView.Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser +4 more
wiley +1 more source
Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing
Advanced Engineering Materials, EarlyView.The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai +6 more
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Gaoya dianqi, 2019 起晕场强是阀厅金具电晕控制的重要依据,针对±800 kV特高压换流站阀厅金具防晕设计裕度过大问题,在海拔高度分别为50 m和4300 m的试验室开展了管母线和屏蔽球的起晕电压试验。利用起晕电压试验、Peek公式和Ansys三维电场仿真计算结果,给出了±800 kV阀厅不同类型金具的防晕最小设计尺寸,并在此基础上提出了阀厅金具表面场强控制建议。建议±800 kV阀厅管形金具等效管径不小于150 mm、球形金具等效球径不小于800 mm、边缘倒角曲率半径不小于30 mm。提出±800 ...
毛艳 +4 more
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Advanced Functional Materials, EarlyView.In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund +6 more
wiley +1 more source
±800kV云广特高压直流工程孤岛运行方式下整流侧投旁通对逻辑优化特性研究
Gaoya dianqi, 2015 ±800 kV云广直流输电工程是世界上第一个±800 kV特高压直流输电工程,工程起点为云南楚雄换流站,落点为广东穗东换流站,额定电压为±800 kV,输送容量为双极5 000 MW。该工程采用双十二脉动阀组串联接线方式,每个极包括阀组1和阀组2。文中基于±800 kV楚穗特高压直流系统现场孤岛调试以及FPT试验,对孤岛方式下投旁通对逻辑优化前后的系统情况进行对比,验证了整流侧投旁通对逻辑优化的有效性。分析结果表明,在孤岛运行方式下,整流侧禁止投旁通对将有利于系统稳定。
杨珏, 常开忠
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The Journal of Engineering, 2019 When two HVDC transmission lines run across, because of the interaction between the two lines, the maximum ground-level total electric field is not a simple superposition of the maximum ground-level total electric field generated when the two lines exist
Fengnyu Xiao +3 more
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Advanced Functional Materials, EarlyView.This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous
Mingfeng Xu +5 more
wiley +1 more source
Dianci bileiqi, 2011 根据±800 kV特高压直流输电工程中支持平波电抗器用支柱瓷绝缘子机械、电气、耐地震等性能的要求,较详细地介绍了±800 kV直流系统中平波电抗器用支柱瓷绝缘子的产品设计、试制及试验等研制情况,支柱瓷绝缘子的污秽外绝缘设计,瓷外表面PRTV涂层的特点、优点,耐地震计算分析和性能评价。试验结果表明,所研制绝缘子的机械、电气等特性均能满足±800 kV特高压直流输电工程的要求。还介绍了向家坝-上海±800 kV特高压直流输电工程中平波电抗器用支柱瓷绝缘子及不同电压等级棒形支柱瓷绝缘子在直流场中的应用。
周军
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Advanced Functional Materials, EarlyView.This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner +9 more
wiley +1 more source