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真型变压器中典型悬浮缺陷的局部放电特征

Gaoya dianqi
局部放电缺陷在运行过程中会逐渐劣化甚至引发高能放电故障，严重威胁变压器的安全运行。文中基于一台110 kV真型变压器搭建局部放电试验平台，设计了高压引线悬浮金属颗粒、高压引线附近金属尖刺悬浮、静电环悬浮3种悬浮放电缺陷，采用阶梯升压法进行试验，记录局部放电发展过程中脉冲电流、特高频和声信号的变化规律并进行对比分析。发现3种悬浮放电缺陷的“剧烈”放电阶段均不明显，击穿前的放电能量均比较低，声信号频谱没有出现“主频左移”的现象。3种缺陷虽然都是悬浮电位放电，但是其局部放电特征明显不同 ...
朱涛, 陈理, 沈煜, 江波, 金雷, 郑玉平, 黄猛   +6 more
doaj  

[Development of a balloon sensor device for force-electrical coupling measurement of esophagus]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ran P, Zhong Y, Lai Y, Liu L, Zhu Y, Zhu H.   +5 more
europepmc   +1 more source

[Researches and clinical translation of smart dressings]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Lyu GZ, Zhao P.
europepmc   +1 more source

[Bayesian network analysis of harsh parenting, experiential avoidance, and adolescent short video addiction risk]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Lyu LH, Jiang JJ, An XL, Guan CB, Yang H, Hao Y.   +5 more
europepmc   +1 more source

[Research progress on flexible wearable sensors for health monitoring]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Chen X, Xu G.
europepmc   +1 more source

[Incidence of small for gestational age infants among singleton live births and analysis of risk factors]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Liu YF, Liu YT, Zhao YF, Sun XJ.
europepmc   +1 more source

[A signal sensing system for monitoring the movement of human respiratory muscle based on the thin-film varistor]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yuan Y, Zhang Z, Xie L, Huang H, Liu W.
europepmc   +1 more source

[Construction and practice of the "Construction Supports Competitions-Competitions Nurture Teaching-Teaching Promotes Learning" closed-loop innovative teaching mode： a case study of micro-plasma emission spectrometer setup and trace element analysis experiment]. [PDF]

Se Pu
Xue WY, Ke D, Zhang X, Zhou XD, Yang RN, Chao QC, Chen ML, Meng H, Yang T.   +8 more
europepmc   +1 more source

[Mediating role of insulin resistance in the relationship between hypertension and NAFLD and construction of its risk prediction model]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
He Y, He H, Cao Y, Wang F.
europepmc   +1 more source

[Relationship Between Neonatal Outcomes and Changes in Serum Platelet-Activating Factor, Fibulin-3, and Umbilical Artery Blood Flow During Late Pregnancy in Pregnant Women With Gestational Hypertension]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Sun Y, Zhang H, Sun L.
europepmc   +1 more source