Results 1 to 10 of about 369 (70)
Characteristics Analysis and Technical Prospect of Low-Frequency Main Transformer for Offshore Wind Power [PDF]
, 2023 [Introduction] Low-frequency alternating current power transmission technology has attracted wide attention. Although its theoretical research continues to go deeper, there are still many problems to be solved before its engineering implementation in ...
Jutian LI +4 more
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Research on Flexible Interconnection of Urban Power Grid [PDF]
, 2023 [Introduction] Due to its flexibility and rapid control ability, voltage source converter based high voltage direct current (VSC-HVDC) technology can be used in asynchronous grid interconnection, renewable energy grid-connection, and urban grid power ...
Jinchuan GUO +3 more
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Research on Thermosensitive Coatings for Thermal Runaway Warning in Energy Storage Power Station [PDF]
, 2023 [Introduction] Lithium iron phosphate battery storage power plants are an important basis for new power systems to consume large-scale new energy, however, the thermal runaway of battery cells seriously threatens the operational safety of storage power ...
Chaolu NIU +8 more
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Electrical response and pore structure evolution affected by cyclical plasma breakdown [PDF]
, 2023 Artificial improvement of coal seam permeability is the key to solve the low gas drainage efficiency and prevent gas dynamic disaster. Plasma based on physical discharge is one of the effective means of coal seam antireflection. However, previous studies
Baiquan LIN +3 more
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正极性雷电过电压作用下植物油-纸绝缘系统的预击穿流注传播和击穿特性研究
Dianci bileiqi, 2021 植物绝缘油具有环保、无毒的特点,在替代电力设备绝缘油方面具有巨大应用潜力。为此本研究建立了一套绝缘油电气特性试验系统,该系统由高速相机、针-板电极系统以及冲击电压发生器组成,试验研究了两种棕榈油以及矿物油配合不同老化时间的绝缘纸板的电气特性,通过高速相机结合阴影法拍摄得到了流注发展长度、速度,通过示波器得到了间隙击穿电压。结果显示绝缘纸板的存在会略微增加棕榈油中的50%正极性雷电击穿电压,其中棕榈油浸渍的绝缘纸板的雷电击穿电压低于矿物油;经过老化后,棕榈油和矿物油浸渍纸板的正极性雷电穿电压都降低 ...
苑捷 +4 more
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Gaoya dianqi, 2022 为保证电缆供电系统的安全稳定运行，需正确选择和使用电缆终端用绝缘油。基于工程中高压电缆充油终端实际运行中的常见问题，文中详细介绍了电缆终端用硅油/聚异丁烯的物理、化学及电气等方面的关键指标，并明确了绝缘油的主要性质与选择标准间的关系；基于现有绝缘油标准和部分实验结果，结合电缆终端所在区域的气候条件、运行环境、与固体绝缘介质间的相容性等方面，提出了绝缘油的选用原则；结合电缆终端现场制作可能遇到的环境条件，归纳了新油到货验收与现场注油等方面需重点关注的事项。文中所提出的绝缘油选用方法与准则 ...
连鸿松 +6 more
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Improvement and Engineering Application on Pulse Power Supply of Electrostatic Precipitator in Coal-Fired Power Plant [PDF]
ObjectivesHigh voltage power supply is the core equipment of electrostatic precipitator (ESP). Pulse power supply can achieve efficient removal of high specific resistance dust, but there are problems such as high pulse voltage causing heating and ...
HE Yuzhong +3 more
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Gaoya dianqi, 2022 植物绝缘油因其较好的绝缘性能及绿色环保等优势,逐渐成为传统矿物绝缘油替代品研究的热点。太赫兹波段光谱具有独一无二的指纹特征吸收峰,使其成为近年来物质检测热点技术之一。文中利用绝缘油的太赫兹时域光谱快速、准确、稳定的数据采集特性,对植物绝缘油的老化状态进行诊断。首先,利用改进的电磁波传递函数消除了仪器和容器的法布里—珀罗(F-P)效应。然后计算出植物绝缘油的吸收系数、折射率等THz谱参数,分析了植物绝缘油在太赫兹区域的介电性能。最后,与相应老化状态下的糠醛浓度进行对比,结果表明 ...
郭丽 +4 more
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FER Molecular Sieve Modification and Application to Catalytic Isomerization of n-Butene [PDF]
, 2017 异丁烯是一种重要的基本有机化工原料，有着广泛的用途。本研究以镁碱沸石FER为催化剂，结合各种改性和后处理方法对催化剂的组成和表面酸性质进行调变，包括硝酸处理改性、尿素处理改性、离子交换改性三个部分，考察了三种改性对应FER分子筛特性的改变，及其对丁烯骨架异构化反应的催化性能（活性、选择性和稳定性）的影响。利用TG、BET、XRD、Py-IR、NH3-TPD、NMR及XRF等手段对催化剂进行表征分析。主要得到如下结果： 1、通过硝酸处理脱除FER骨架铝，降低强B酸中心数量；与此同时 ...
周杰
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Toxic Effects and Mechanisms of Polychlorinated Biphenyls (Aroclor 1254) on the Pancreas in Male Mice [PDF]
, 2010 作为持久性有机污染物之一的多氯联苯(PolychlorinatedBiphenyls，PCBs)引起的环境问题已受到极大关注。尽管有研究表明PCBs与糖尿病和胰腺癌有关，但关于PCBs对胰腺毒性的机制研究仍然很不清楚。本研究以C57BL/6品系青春期雄性小鼠为研究对象，研究环境水平的PCBs对胰腺的毒性影响。采用浓度分别为0.5、5、50和500μg/kg的Aroclor1254，通过灌胃法对小鼠进行染毒，每三天灌胃一次，暴露持续50天。主要研究结果如下： 1、Aroclor1254暴露小鼠50天后 ...
吴甜
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