Results 41 to 50 of about 179 (93)
基于真空灭弧室和SF6灭弧室串联的混合断路器技术发展与研究现状
Gaoya dianqi, 2012 在归纳国内外高压开关研究现状的基础上,综述了混合断路器技术的发展历史与研究现状,分析了真空电弧与SF6电弧的相互作用机理,研究了混合断路器的动态绝缘特性并得到混合断路器中两灭弧室相互作用的关键区间,对比说明了现有混合断路器样机的结构及控制特点,阐明了进一步研究混合断路器技术亟需解决的主要问题。认为应尽快探明两灭弧室触头动作的最优控制策略,得出不同开断容量的SF6灭弧室与真空灭弧室串联后其开断容量增益曲线,为混合断路器的工业化应用提供重要的理论基础。
程显 +4 more
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Gaoya dianqi在线路上加装串联电抗器是抑制短路电流的有效措施，但同时也对断路器瞬态恢复过电压（TRV）产生显著影响，会影响断路器的正常开断，进而影响系统的安全稳定运行。文中结合中国现有500 kV超高压线路串联电抗器工程，利用电磁暂态仿真软件EMTP-RV研究了不同工况下串联电抗器接入对断路器TRV的影响。研究结果表明：接入的串联电抗器参数、位置对TRV有重要影响，串入的电感量越大，TRV电压上升率越低；安装位置越靠近断路器，TRV上升率越大；线路长度对TRV上升率影响较小，引起的变化幅度在5%以内 ...
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[Mechanism and prevention and treatment strategy of progressive injury in high-voltage electric burns]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2023 Zhang QF, Hao JW.
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[Research progress on rodent models of cervical spinal cord injury]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2023 Chen H, Rong X, Huang K, Liu H.
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Digitalized diagnosis and treatment of pigmented villonodular synovitis of temporomandibular joint: a case report. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Li C, Parekejiang Pataer, Gong Z.
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Gaoya dianqi, 1986 一、概述 最近大容量的电力用断路器发展迅速,由于灭弧断口的改进,现在已制成300kV50kA的单断口断路器,550kV断路器也减为由两个断口构成。为了试验这种断路器的短路开断性能,便要采用1953年AEG公司威尔和道布克两人发表的合成短路等价试验法。由于大容量发电机和变压器的造价贵 ...
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[Effect of composite graphene-protein hydrogels on neural regeneration after spinal cord injury in rats]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhang Z, Fan Z, Wang X, Zhu Z.
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[Effects of repetitive transcranial magnetic stimulation on neuronal excitability and ion channels in hindlimb unloading mice]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Hou W, Fu R, Zhu M, Zhu H, Ding C.
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[Research progress on elbow joint rehabilitation robots]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanLi M, Xu F, Wang D, Xu J.
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[Adeno-associated virus-mediated gene therapy for genetic epilepsy: prospects and challenges]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiSun B, Wang XL, Peng J.
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