Results 121 to 130 of about 1,101,459 (243)
Gaoya dianqi, 2012 直流滤波器是特高压直流输电工程直流场重要成套设备之一,笔者在总结前期特高压直流输电工程系统研究结论的基础上,研究分析了+800 kV特高压直流输电工程直流滤波器设计需要考虑的关键问题,包括滤波器形式,直流侧谐振,要考虑的典型故障;介绍了用于计算直流滤波器典型故障的模型和方法。以云广+800 kV特高压直流输电工程为例,对直流侧谐振进行了校核,对直流滤波器设备暂态定值进行了计算。研究结果表明,云广±800 kV特高压直流输电工程直流滤波器设计是合理的,可满足直流系统安全可靠运行要求。
田邑安, 张万荣, 行鹏, 胡宇
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Vibration characteristics of ±800 kV converter transformers part I: Under no-load conditions
International Journal of Electrical Power & Energy SystemsFor lack of study on the vibration characteristics of converter transformers, this paper studied the vibration signal analysis method and investigated the vibration characteristics of converter transformers during the commissioning of a ±800 kV converter
Menghao Qian +5 more
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Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering
Advanced Materials, EarlyView.Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera +22 more
wiley +1 more source
工程科学与技术, 2018 The mechanical properties of composite electrical equipment are better than ceramic electrical equipment and it have broad application prospects in substation or converter station.
Zhubing ZHU +6 more
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Epitaxially Integrated Electro‐Optic KNbO3 Thin Films on Silicon
Advanced Materials, EarlyView.We demonstrate the first epitaxial integration of electro‐optic KNbO3 thin films on silicon using suboxide molecular‐beam epitaxy. Combining adsorption‐controlled molecular‐beam epitaxy, advanced characterization, and phase‐field modeling, we demonstrate phase‐pure crystalline films mirroring bulk crystals with robust Pockels response, enabling future ...
Sankalpa Hazra +17 more
wiley +1 more source
Subestación eléctrica transformadora 220/132/20 kV [PDF]
, 2011 Proyecto de diseño de una Subestación Eléctrica Transformadora con tres niveles de tensión, 220, 132 y 20 kV. Posee cuatro transformadores de potencia, dos de 80 MVA y dos de 30 MVA.
Montañés Espinosa, Antonio +1 more
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Gaoya dianqi, 2012 直流输电作为一项成熟、可靠的大容量、远距离输电技术,在中国跨省、区联网工程中发挥了重要作用。随着特高压±800 kV直流输电工程的顺利开展和实施,更高电压等级±1 000 kV直流输电技术的发展成为可能。直流互感器是供直流输电系统用电能计量、电量监测、电力系统控制与保护的重要装置,由于直流互感器的技术比交流互感器复杂,制造难度大,国内用量少,且事故率很高,所以一直没有得到推广,特高压±800 kV云南—广东和向家坝—上海直流工程中直流互感器均依赖于进口,中国未掌握核心技术。为推进特高压直流设备国产化进程,
费烨 +11 more
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Advanced Materials, EarlyView.Cu2S/NiOOH heterojunction enables efficient ammonia electrooxidation coupled with hydrogen evolution. Interfacial electronic modulation of Ni sites promotes selective NH3‐to‐NO2− electrooxidation at high current density. In a membrane electrode assembly, Cu2S/NiOOH maintains over 90% Faradaic efficiency of nitrite at 800 mA cm−2, highlighting its ...
Ke Wang +13 more
wiley +1 more source
Berufsbezogenes Deutsch - Ein mutliperspektivischer Impuls
, 2014 Daase A, Ohm U, Grünhage-Monetti M. Berufsbezogenes Deutsch - Ein mutliperspektivischer Impuls. In: AWO KV Bielefeld, ed. Berufsbezogenes Deutsch - Knüpfen am gemeinsamen Netz. IQ Landesnetzwerk NRW. Dokumentation des Fachtags am 25.
Daase, Andrea ; https://orcid.org/ +3 more
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Gaoya dianqi, 2012 结合一起800 kV罐式断路器液压机构渗油缺陷,认真分析机构组装工艺,并对机构零部件进行了检查测试,发现连接套设计公差偏大、现场安装方法不当是引发缺陷的根本原因。通过重新设计加工连接套、改进现场安装方法,彻底消除了机构存在的安全隐患,为后续800 kV罐式断路器安全运行奠定了基础。
李海波, 万荣兴
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