Gaoya dianqi高频电流的趋肤效应使等效导体中电流产生的热损耗增大，为输电线路融冰提供了一种新的技术方法。文中提出了一种基于LC振荡放电的高频融冰方法，利用RLC串联电路从某一稳态向另一稳态转换时由电容充放电引起电流变化的特性，通过控制电压方波来获得高频的电流。该方法可以有效降低IGBT的开关频率，减少开关损耗。根据功率器件的性能设计了一台融冰电源，仿真实验表明，对长度分别为40 km和35 km的LGJ-400/50导线、LGJ-240/40导线、LGJ-120/25导线和LGJ-70/10导线可获得1 ...
李颖许 +4 more
doaj
Gaoya dianqi, 2012 运行于海拔1000 m左右山区地形的35 kV中性点不接地系统,其I母电磁式电压互感器（PT）在只带空母线的状态下发生爆炸,更换电磁式PT并安装消谐器后不久再次爆炸。事故后进行了高压诊断性试验和油化试验,结合交接试验数据分析了事故前后电气性能和绝缘性能的变化,研究了故障录波图波形的特点,发现电磁式PT一次公共N端对地放电,三相电压相位差发生了明显变化。认为由于电磁式PT与消谐器绝缘配合不当,发生单相弧光接地时,N端耐受电压过高而将对地绝缘击穿,使得消谐器失去作用,进而诱发较少见的单相（A相 ...
尧广 +4 more
doaj
[Research progress in the application of molecular imprinting technology in catalysis]. [PDF]
Se PuYe WM +5 more
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[Preparation of magnetic bifunctional materials for exosome capture from serum and phosphopeptide enrichment]. [PDF]
Se PuWang ZR, Zheng HJ, Jia Q.
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Dianci bileiqi目前对复合绝缘子的热老化研究主要依赖试验方法进行，缺乏热老化过程中材料的微观动态变化认识。文章基于反应力场分子动力学方法，在微观原子层面对复合绝缘子的热解过程开展研究。研究发现，复合绝缘子热老化主要是硅橡胶材料发生Si-CH3、C-H、Si-O断裂，形成的产物主要包含了CH4、C2H4、H2和一些小分子硅氧烷。随着热解的持续，硅橡胶分子结构中新生成的Si-Si、Si-H键的数量不断上升，Si-Si键使得硅橡胶材料的交联度增加，Si-H键易水解形成OH。对老化后的硅橡胶进行介电常数计算发现 ...
刘海林 +4 more
doaj
[Molecularly imprinted polymers： novel green preparation methods and cutting-edge applications review]. [PDF]
Se PuLi F +5 more
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[Wound repair strategies of natural polysaccharide hydrogels based on microenvironmental regulation]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiXu FJ, Li Y.
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[Application of molecularly imprinted polymers-based sensors for determination of acute coronary syndrome biomarkers]. [PDF]
Se PuZhang Y +6 more
europepmc +1 more source
[Design and synthesis of molecularly imprinted polymers and their applications in medical diagnosis and biocatalysis]. [PDF]
Se PuSong Q, Li X, Lyu Y.
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[Neonatal-onset multisystem inflammatory disease in a neonate caused by a <i>de novo</i><i>NLRP3</i> variant]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiGao FH +4 more
europepmc +1 more source