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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  

[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Yao F, Liao Z, Wang T, Shen M.
europepmc   +1 more source

高压变频器在发电厂中的智能控制与故障诊断技术

吴伟东
openalex   +2 more sources

矿山高压三电平ANPC变频器预测控制研究

, 2016
於静, 莫修权, Nan Xu
openalex   +2 more sources

[Development and electrophysiological validation of a temporal interference transcranial magnetic stimulation system for mice]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Cui C, Wang T, Zhang Y, Zheng W, Xu G.
europepmc   +1 more source

[Research progress on the application of ultrasound technology in the diagnosis and treatment of lymphedema]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Tang ZY, Liu R, Deng CL.
europepmc   +1 more source

High-Frequency Model of Transformer Derived from Enhanced Magnetic Circuit Allowing for the Capacitive Effect考虑电容效应的增强磁路变压器高频模型

Yingying Wang, Jindi Pang, Jiahui Yu, Xiongyang Cai, Xiangru Guo   +4 more
openalex   +1 more source

[Outcomes of suture-mediated vascular closure device in the closure of left brachial artery access site after thoracic endovascular aortic repair]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li W, Zhang X, Li W, Zhang T, Zhang X.
europepmc   +1 more source

[Comparison of effectiveness between endoscopic and microscopic anterior cervical discectomy and fusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang C, Chen K, Liu H, Ge Z, Lin D, Chen B, Su G, Lin Y, Hou Y, Li Y.   +9 more
europepmc   +1 more source

[Impact of surgeon's dominant hand-side consistency with surgical approach on operational efficiency of unilateral biportal endoscopic lumbar discectomy: a prospective cohort study]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li W, Gao M, Zhang L, Yu Q, Chen X.
europepmc   +1 more source