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500 kV耦合负压换流型混合式直流断路器原理与研制 [PDF]
全球能源互联网, 2018 多端柔性直流系统在分布式能源和直流负荷接入、网络柔性互联、电能质量等方面具有显著优势，成为未来电网的重要发展趋势。为了保证多端柔性直流系统安全稳定可靠运行，需要能够在数毫秒内开断故障电流的直流断路器。本文面向张北±500 kV柔性直流电网示范工程的应用需求，开展了500 kV直流断路器原理研究与样机研制。首先，提出500 kV耦合负压换流型混合式直流断路器系统方案，给出其拓扑结构、工作原理和控制逻辑；进而，设计基于电磁斥力操动机构和电磁缓冲机构的快速机械开关 ...
张翔宇 +7 more
doaj +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Improving the efficiency and stability of oxygen evolution electrocatalysts remains essential for advancing water splitting technologies. Although in situ surface reconstruction into active phases is desirable, it often leads to uncontrolled structural degradation.
Beirong Ye +11 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
wiley +1 more source
Gaoya dianqi, 2017 高压开关电动操动机构的电气制动技术虽然是一项重要的应用技术,但是未得到足够的重视。因此,文中系统阐述了电气制动技术的工作原理及其技术特点,总结了工程应用中出现的常见问题与排查方法,利用Lab VIEW软件对样机的制动参数进行了测试。经分析得出:采用能耗制动,将电动机变为他励发电机,产生的制动能量使电动机构在0.3 s以内完成停车。根据电机回路电源类别选择不同的制动方式:永磁直流电动机为直流电源时,采用单电阻制动方式;串励电动机为单相交流电源,采用双电阻制动方式。在相同的制动回路中 ...
陈旭 +6 more
doaj
Functionalized Silica‐Constructed Self‐Supporting Composite Separator for Lithium Metal Batteries
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lithium metal batteries (LMBs) are considered highly promising next‐generation energy storage systems owing to their exceptionally high theoretical specific capacity and ultralow electrochemical potential. Nevertheless, the practical deployment of LMBs is still severely restricted by the uncontrollable formation and propagation of lithium ...
Li Chen +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic acetylene (C2H2) semihydrogenation is a green route for ethylene (C2H4) production, yet the activity–selectivity trade‐off caused by imbalanced adsorption/activation of reactants and products remains a core challenge. Herein, we realize precise regulation of Pd oxidation states (Pd0, Pdδ+, and Pd2+) on anatase TiO2 nanocubes via
Zhidan Wang +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
wiley +1 more source
Gaoya dianqi, 2009 研究了一种高压断路器直线电机操动机构,设计分析了永磁直线直流电机及其运动特性。基于40.5 kV真空断路器机械特性的要求,设计了一台配有制动保持装置的永磁直线直流电机操动机构,利用有限元方法建立了电机的仿真模型,对永磁直线直流电机的基本特性和起动过程进行了特性仿真,得到了电机运行时的电磁推力、电流、速度等曲线并进行了分析,得出了电机操动机构能够提供的机械特性,为真空断路器采用直线电机操动机构提供了依据。
林莘, 李永祥, 徐建源, 吴刚
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT The immunosuppressive milieu of hepatocellular carcinoma (HCC) remains a major obstacle to durable antitumor responses. Mechanical‐energy‐driven piezocatalysis provides a noninvasive means of inducing oxidative damage and immunogenic tumor destruction; however, inefficient utilization of piezoinduced charges and insufficient localization of ...
Mingjian Zhang +7 more
wiley +1 more source
, 2011 本文研制了一套双静电探针测量系统，对以氩气为推进剂的电弧加热发动机羽流进行了测量，得 到了电子温度和电子数密度的轴向和径向分布，以及随弧电流、气流量的变化趋势。结果表明，羽流显著 偏离局域热力学平衡状态，电子温度呈现复杂的分布和变化趋势。羽流轴线上的电子温度明显低于偏离轴 线处的值，而电子数密度远高于偏离轴线处的值；羽流轴线上的电子温度随弧电流的增加而降低，电子数 密度随弧电流的增加而增加 ...
潘文霞, 孟显, 吴承康
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