Results 111 to 120 of about 6,822 (200)
Gaoya dianqi, 2012 国家风电设备质检中心在盐都区开工建设2012年2月2日消息:1日上午,国家风电设备质检中心在盐都区正式开工建设。国家风电设备质检中心主要开展风能发电机组、塔架组件、防腐材料、传动设备、电控系统、叶片、冷却"
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Gaoya dianqi, 2019 针对哈密地区大规模风电场在无串补情况下发生的次同步振荡现象。文中在PSCAD/EMTDC软件上搭建了多机直驱风电场无串补输电系统模型,结合特征值分析法研究了风速、网侧控制器参数、风电汇集点短路比和火电机组出力对次同步振荡特性的影响,并进行仿真验证。结果表明:无串补情况下,风电场在各风段均有可能发生次同步振荡,风速小,振荡频率高,风速大,振荡频率低。网侧控制器比例增益越大,振荡频率越小,积分增益越大,振荡频率越大。短路比越小,系统发生次同步振荡的可能性越大。低功率运行时,火电机组出力在50%～80%范围内,
邓王博 +3 more
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Dianci bileiqi风机附近的防雷问题是风电场防雷的重点，影响到风电资源能否安全有效送出。目前采用在集电塔后一基杆塔三相安装多间隙避雷器可以与氧化锌避雷器配合，减少由于避雷器故障而造成的系统故障，但是多间隙避雷器在动作时产生的截波沿线路传入风机箱变，可能会威胁到变压器绕组的绝缘。基于上述问题，本研究在ATP-EMTP上搭建了多间隙避雷器截波特性对风机箱变绕组的绝缘影响分析仿真模型，考虑了多间隙避雷器的常规安装方式和极限安装方式，分别计算了两种情况下多间隙避雷器在受雷击后产生的截波过电压对风机箱变绝缘产生的影响。通过仿真分析，
潘才维 +7 more
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[Risk factors for mortality in children with severe drowning: a 10-year single-center retrospective study]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiYang YX +5 more
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[Correlational research on body fat rate and skeletal muscle rate with depression in the population of assisted reproduction]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanSong X +6 more
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[Research advances on hepatic encephalopathy following transjugular intrahepatic portosystemic shunt]. [PDF]
Zhonghua Gan Zang Bing Za ZhiYe JJ, Pan YL, Wang J, Lyu Y.
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[Construction of a prognosis forecasting model for breast cancer based on lipid metabolism-related genes and functional verification of <i>ALDH2</i>]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanLu Z, Lu Y, Zhou J, Zhu Y.
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[Association between adverse outcomes during hospitalization and early postnatal weight changes in term appropriate-for-gestational-age infants with early-onset sepsis]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiZeng SC, Zhou XL, Xiang LL, Hua ZY.
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