Gaoya dianqi, 1994 绝缘子是电力系统中数量最多的元件,也是线路故障的多发点,如何及时、准确、方便地检测出劣化绝缘子（也称零值绝缘子）,一直是电力行业关注的问题.多年来,国内、外围绕带电检测的方式以及仪器设备做了大量的研究工作,陆续推出了十余种产品,见附表.附表中的各种劣化绝缘子测量仪虽各具特色,却又都存在着某些不足,如:精度差、重量大、操作不便、价格过高等原因而没能推广使用.目前,国内线检部门用得最多的仍是最原始的短路叉法.由此可见,研制新一代劣化绝缘子测量仪十分必要.
邹林, 张源斌
doaj
[Diagnosis and treatment of tinnitus]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2022 Yu L, Yang S, Wang Q, Li M.
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Gaoya dianqi, 2011 钢化玻璃绝缘子自爆严重影响了输电线路的安全运行。笔者根据近年来中国输电线路上发生的玻璃绝缘子集中自爆事例,分析了钢化玻璃绝缘子自爆规律及残锤特性、自爆影响因素和自爆机理,并在此基础上总结分析了降低钢化玻璃绝缘子自爆率的技术措施。结果表明:玻璃绝缘子自爆具有"早期暴露,逐年下降"的特点;玻璃绝缘子零值自爆后,由于它的残留强度高,不致造成掉串事故。自然环境、机械荷载、严重污秽、生产工艺等对钢化玻璃绝缘子自爆有影响。玻璃件中间张应力层发生偏移,不匀称分布是自爆的主要原因之一。采取二次热冷冲击试验、内水压试验 ...
王少华, 叶自强, 梅冰笑, 罗盛
doaj
±800kV直流输电线路绝缘子钢帽对低/零值绝缘子检测装置悬浮放电研究
Dianci bileiqi, 2019 研发了一种在线检测零值绝缘子的装置,并介绍了该装置在绝缘子上的攀爬及其检测过程。靠近导线侧绝缘子钢帽上的电位较高,为了防止检测装置在钢帽上攀爬过程中钢帽对抓手悬浮放电引起控制电机的损坏,本文运用电磁暂态仿真软件ATP/EMTP搭建了悬浮放电的转移电流模型,并用Ansys软件求取转移电流模型中的参数。考虑了钢帽与抓手间距离d以及抓手自身电感L对转移电流的影响。研究结果表明:转移电流的幅值与距离d成反比,电位转移过程中释放的瞬态能量与间距d成反比;转移电流的幅值与抓手电感L成反比 ...
李稳 +6 more
doaj
The question about the numerical value and quantitative data transfer of implant prosthodontics-orom experience guidance to digital guidance. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2021 Yu HY.
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[CT radiomics<b>-</b>driven lung cancer subtyping based on pretreatment imaging: A single<b>-</b>center retrospective cohort study]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanHan F +5 more
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[A comparative study of 3.0T (1)H-MRS for varying degrees of liver fibrosis in cynomolgus monkeys]. [PDF]
Zhonghua Gan Zang Bing Za Zhi, 2020 Ding K +5 more
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[Changes in hepatic phase Ⅱ detoxification enzymes and their mechanism in metabolic associated steatohepatitis (MASH) induced by MCD diet in mice]. [PDF]
Zhonghua Gan Zang Bing Za ZhiGao JQ +6 more
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[Construction of a machine learning prognostic prediction model based on psoas muscle index for patients with decompensated liver cirrhosis]. [PDF]
Zhonghua Gan Zang Bing Za ZhiLuo MY +8 more
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[A segmented backprojection tensor degradation feature encoding model for motion artifacts correction in dental cone beam computed tomography]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoZeng Z, Wang Y, Lin Z, Bian Z, Ma J.
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