Gaoya dianqi现有的配电网单相接地电流消弧装置需在配电网正常运行时测量对地参数，在故障时注入电流完成全补偿消弧。但由于三相对地参数随配电网的运行方式不同而发生改变，电流消弧装置可能因配电网单相接地故障后对地参数变化而导致注入的电流无法将系统对地参数补偿至正常状态，无法全补偿消弧。针对以上问题，文中提出了一种基于混合型柔性消弧的实时对地参数测量方法，在检测到配电网单相接地故障后，利用有源电流消弧装置注入特征频率电流信号，计算系统过渡电阻和总对地电容，并计算消弧需要注入的电流。随后闭合非电力电子设备 ...
郭润生 +4 more
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[Deep eutectic solvent and improved needle filter-based liquid-membrane microextraction combined with high performance liquid chromatography for the determination of sulfonamide and fluoroquinolone residues in milk]. [PDF]
Se PuXu RM +5 more
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Gaoya dianqi基于风电场站实际调频需求，展开混合储能的优化配置计算能实现降低调频服务成本和混合储能投资成本的兼顾。故而，文中提出了一种基于模糊逻辑预测控制的混合储能辅助风电调频的双层优化配置模型。上层模型由计及混合储能投资成本，运维成本，替换利用成本，电量偏差成本，风电调频收益以及促进新能源消纳收益的六因素优化配置模型，为下层模型提供混合储能功率与容量限制；下层模型构建了基于模糊逻辑控制的单步长混合储能协同风电调频的能量优化分配策略，缩短策略计算时间同时避免了电池储能的频繁充放电行为 ...
王岑峰 +5 more
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Dianci bileiqi, 2008 为保证变压器等配电设施的安全,在盛夏雷雨季节来临之际各地供电部门纷纷采取措施,如组织对避雷器进行集中校验等,确保配、电网安全运行。然而,有些地方选择安装避雷器的位置不当,将避雷器安装在配电箱低压侧的计量互感器与交流接触器之间。一旦低压避雷器遭雷击穿而接地时 ...
doaj
[Construction of the evaluation index system for nursing quality management in outpatient dental clinics based on the structure-process-outcome model]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiWei J +7 more
europepmc +1 more source
[Application and research progress of mandibular distraction osteogenesis in craniofacial microsomia]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLi L, Zhang Z.
europepmc +1 more source
[<i>In vitro</i> mechanical testing and finite element analysis of a novel β-Titanium alloy pedicle screw-rod fixation system]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi J, Liu Y, Wang D, Li H, He X, Lu T.
europepmc +1 more source
[Single-Center clinical application and analysis of Robot-Assisted endoscopic salivary gland surgery via a postauricular approach]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiHan P +5 more
europepmc +1 more source
[Safety study of resin-based dental materials using gas chromatography-mass spectrometry techniques]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLi Y, Zeng Y, Du Z, Ren G.
europepmc +1 more source
[Advances in application of digital orthopedic technology in total hip arthroplasty for developmental dysplasia of hip]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhang B, Li H, Li M, Kong X, Chai W.
europepmc +1 more source