Results 21 to 30 of about 562,108 (153)
Gaoya dianqi, 2023 为了防止柔性直流输电系统在双极短路故障下过大的短路电流损坏输电系统，且考虑到过大的短路电流也会损坏断路器的避雷器，文中提出了一种可开断故障电流且有效减小避雷器吸能的直流断路器。利用PSCAD搭建了含卸能电阻的直流断路器模型和三端±350 k V柔性直流输电系统模型。在双极短路故障下，通过仿真对比分析了此模型与理想直流断路器模型和不含卸能电阻的直流断路器模型的区别。文中发现，含卸能电阻的直流断路器与理想直流断路器相比更容易切断故障电流，与不含卸能电阻的直流断路器相比有效减小了避雷器吸能。并且 ...
田小健, 丁璨, 聂太平, 袁召
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Lithium Deposition Behavior of Reconstituted Two‐Dimensional Zeolite Y Separators
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT During the operation of lithium‐ion batteries, uncontrollable lithium dendrite growth often occurs, resulting in internal short circuits and a significant reduction in cycle life, which poses a major obstacle to their practical application.
Yingying Deng +9 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Bismuth anode materials are considered promising anode candidates for sodium–ion batteries (SIBs) due to their high theoretical capacity and appropriate working potential. Nevertheless, the significant volume expansion that occurs during the cycling process restricts its broader application in sodium–ion storage. Herein, Bi/Bi2O3 nanoparticles
Jiaju Lu +3 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The development of neuromorphic electronics with visual perception and adaptive capability is highly desirable for advancing artificial vision systems. Herein, we have demonstrated a dual‐plasticity adaptive phototransistor based on IGZO nanofibers that exhibits the perception and dynamic adaptation behavior of rod and cone cells to varying ...
Shanshan Jiang +5 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Moisture‐enabled electricity generation technology offers a new paradigm for sustainable energy harvesting, but its practical applications are still limited by issues such as low output power and insufficient long‐term stability. In this paper, an asymmetric sandwich‐structured hydrogel moist–electric generator (SSHMEG) with an ion ...
Peng Chen +7 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
wiley +1 more source
Gaoya dianqi, 2013 发电机断路器电源侧短路电流具有较大的非对称度,在特殊工况下,甚至会出现电流延迟过零的现象。笔者结合实际工程中的发电机参数,计算了考虑电弧前后发电机断路器电源侧短路电流的变化,阐述了电源侧短路电流出现延迟过零的原因,分析了电弧对电源侧预期短路电流的影响。对比发电机断路器电源侧预期短路电流计算结果和系统侧短路电流开断试验数据,分析了发电机断路器电源侧短路电流的开断能力,尤其是具有延迟电流零点短路电流的开断能力,其结果可作为确定发电机断路器电源侧短路电流开断能力的参考依据。
成勇 +5 more
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How Many Floods Have Occurred in China in the Past Decade? A Perspective From Social Media
Earth's Future, Volume 13, Issue 4, April 2025.Abstract Global climate change has led to frequent and widespread flood disasters in China. Traditional flood disaster investigations mainly focus on major flood events, and small‐scale flood events are often overlooked. This study utilized the Sina Weibo social media platform to detect flood events in 370 cities in China from 2012 to 2023.
D. Shen +5 more
wiley +1 more source
Gaoya dianqi, 2018 干式空心电抗器故障发生最多而又难以检测的是匝间短路故障,除了单根导线绕组的匝间短路外,还有多根导线绕组相互间的匝间短路,而对于电抗器后者故障的研究与保护目前几乎处于空白。针对此问题,文中提出了汇流母排不平衡电流法测绕组间短路,建立了电抗器不同绕组间短路的短路模型,并对其进行了数值仿真,最后实验测量单相干式空心电抗器各汇流母排之间的不平衡电流,验证汇流母排不平衡电流法的可行性。实验发现:不同的导线绕组间发生匝间短路后,短路位置越靠近电抗器端部母排电流测量位置其不平衡电流越大 ...
古亮 +4 more
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Gaoya dianqi, 2013 阀故障电流试验作为考核换流阀短路电流耐受能力的运行型式试验项目,必须在与实际运行工况最为等价的试验回路上进行。短路发电机系统既能提供阀故障电流试验要求的短路电流,同时又能够在短路电流过零时刻立即提供预期恢复电压,具有较高的等价性,是进行阀故障电流试验的一种理想回路。短路发电机系统进行阀故障电流试验时,先利用阀运行试验合成回路提供换流阀正常工况下的运行条件,在换流阀结温及运行参数满足要求时,通过短路发电机系统模拟实际运行中的突发短路故障,使换流阀流过标准规定的短路故障电流,并承受恢复电压 ...
胡治龙 +4 more
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