Results 41 to 50 of about 13,145 (215)
Gaoya dianqi, 2010 为了研究换流站交流滤波器母线接入高抗后,操作该高抗产生的过电压,详细分析了切母线高抗引起的截流过电压和合闸过电压,并建立了换流站接入系统的EMTP模型,对母线高抗的操作过电压进行仿真计算。研究结果表明,随断路器截断电流值的增大,由分闸产生的操作过电压（包括截流过电压、断路器断口恢复电压和恢复电压上升率）较高;而合母线高抗未产生谐振过电压,也没有滤波器在合闸过程中过载。得出,在高抗侧并联一组避雷器能够有效地限制此过电压。
李振强 +6 more
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The comparison of several current references and a design of high precision CMOS current reference [PDF]
, 2006 本文介绍并分析了几种典型的电流源结构,并设计了一种具有良好稳定性和高精度的CMOS基准电流源。在高精度的基准电流源电路中使用了带隙电路,使电路获得一个不受电源电压、温度和工艺参数影响的基准电压,然后通过电压—电流转换电路获得稳定的基准电流。HSPICE的仿真结果表明:当温度从-55℃到125℃变化时,电流输出仅变化了0.004。This paper compared several typical current references and designed a CMOS current ...
冯勇建, 郭建宁, 陈文芗
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao +11 more
wiley +1 more source
Gaoya dianqi, 2017 文中介绍了126 kV单断口真空断路器的操作过电压现场测试结果。首先,确定断路器应用场所并设计了过电压测试方案;然后,测试真空断路器和SF6断路器切合变压器的操作过电压并进行对比;最后,测试真空断路器切合空载线路操作过电压。通过测试,真空断路器和SF6断路器切合变压器的操作过电压水平基本接近,切合空载变压器时无过电压,而带载变压器操作过电压可达1.46倍;真空断路器切合空载变压器的过电压分别可达1.34倍和1.25倍。
全伟 +4 more
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Research on Tidal Optimization of Voltage Overrun Problem in Photovoltaic Distribution Network With Electrical Energy Router [PDF]
ObjectivesWith the access of high-penetration distributed photovoltaic to the distribution network, the problems of power back-feeding and voltage overrun become more and more serious.
FENG Zining +3 more
core +1 more source
Orbitally Driven Anomalous Thermal Transport Under High Pressure in Gallium Nitride
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Extreme conditions such as high pressure offer opportunities for innovative materials design and applications. For over a century, studies on thermal transport in crystals under high hydrostatic pressure have shown that lattice thermal conductivity generally exhibits a monotonic increase with pressure.
Zong‐Hao Yuan +8 more
wiley +1 more source
基于真空断路器预击穿特性的海上风电场集电网合闸暂态过电压仿真研究
Gaoya dianqi, 2019 海上风电场中压电缆集电系统真空断路器在闭合空载变压器操作中,真空断路器预击穿会在机端变压器的高压侧产生暂态过电压,该过电压与电缆作用产生高频振荡过电压将对变压器绝缘产生损坏。文中研究真空断路器预击穿产生高频暂态过电压的机理,在PSCAD/EMTDC暂态分析软件上搭建真空断路器预击穿现象的自定义模型,并将此模型应用于简化的海上风电场中压电缆集电系统模型,研究合闸初相角、电缆长度和机端变压器位置对暂态过电压的影响。仿真结果表明机端变压器位于机舱且合闸初相角为15°过电压陡度最大 ...
吴俊臣 +3 more
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The Design and Realization of Electric Power Quality Monitoring System Based on Virtual Instrument Technology [PDF]
, 2009 在电力市场环境下，电能质量将影响电能的价格。随着我国经济的发展，各种工业生产对电能质量的要求越来越高，及时准确地得到电能质量参数，对于工业生产有重要的指导意义。不同的电力用户对电能质量有不同的需求，解决电力系统的电能质量问题，首先就需要对电能质量参数进行实时的监测和分析，从而能够正确评估电能质量的好坏，及时地找出引起电能质量恶化的原因，进一步提出解决电能质量问题的整改方案，为有关部门采取有效措施隔离或降低电能质量恶化的危害提供决策支持，因此需要对电能质量进行科学的评估 ...
陈栩
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo +6 more
wiley +1 more source
Dianci bileiqi, 1981 随着输电电压的提高,操作过电压比大气过电压显得更重要,尤其是超高压系统。操作过电压的绝缘配合问题,引起了有关方面的很大注意。为了有效地降低超高压系统中电气设备的操作过电压绝缘水平,必需对避雷器的限制操作过电压能力开展研究。因而,避雷器在操作过电压下的续流遮断特性和试验方法,也就成了重要的问题。近年来,各国对避雷器在操作过电压（主要是合闸长线过电压）下的灭弧能力以及操作过电压下的续流试验方法进行了大量的研究工作 ...
龙淑范, 张雨时
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