Results 51 to 60 of about 13,187 (169)

考虑分布式再生能源和储能的主动配电网可靠性评估 [PDF]

open access: yes, 2019
随着主动配电网技术的逐步发展和应用,针对主动配电网的各项评估技术也需要进一步研究。由于主动配电网在网络结构、潮流流向等方面与传统配电网有很大区别,因此针对主动配电网的评估方法也与传统配电网不同,提出了一种考虑分布式再生能源和储能的主动配电网可靠性评估方法。首先运用蒙特卡洛模拟法进行系统状态选择,再基于不同网络类型,采用改进的前推回代潮流计算方法进行潮流计算与潮流平衡调整,进而计算各项评估指标,获取综合评估值。通过对9个方案进行可靠性评估 ...
刘旭娜   +4 more
core   +1 more source

Phosphorus‐Doping Drives the Formation of a Pt‐Skin@PtFe Alloy Catalyst With Modulated d‐Band Center for Oxygen Reduction

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Platinum (Pt)‐based catalysts are crucial for the commercialization of hydrogen/metal air batteries, but they suffer from Pt scarcity, high cost, and nanoparticle dissolution/agglomeration, mainly leading to performance degradation. We address this by synthesizing a PtFe alloy catalyst (PtFe–PA–NC) via a phytic acid (PA) assisted pyrolysis ...
Chenyang Shu   +9 more
wiley   +1 more source

电能质量监测装置的电磁兼容设计和试验

open access: yesGaoya dianqi, 2006
电能质量监测装置是智能电器监控单元的典型代表之一,介绍了一种电能质量监测装置的电磁兼容设计,并根据电磁兼容试验中发现的问题,对设计进行了改进。针对不同端口有关的电磁兼容问题进行了研究。
牛博   +4 more
doaj  

Design and Implementation of Monitor System in Large Hydropower Station [PDF]

open access: yes, 2015
我国大规模发展高耗能、高污染产业的代价就是今后昂贵的环境恢复成本和多地的雾霾天气,越来越多的人开始关注和呼吁清洁能源的开发和利用。水能发电作为一种清洁可再生能源,越来越多的被世界各国开发和利用。水能发电具有经济效益突出、减少污染物排放、开停机速度快,同时可兼顾防洪、通航、灌溉、养殖等综合效益的优点。目前水能发电在我国已成为稀缺资源,如何更好的开发利用大型水电站监控系统提高水电站综合发电效率,减轻员工工作量,成为亟待解决的问题。 本文以大型水电站监控系统为研究对象,从需求分析、系统设计、功能实现 ...
刘玮璘
core  

In Situ Construction of S‐Scheme VIn‐Zn2In2S5/O‐Zn2In2S5 p–n Homojunctions for Enhanced Photocatalytic Hydrogen Evolution

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The construction of p–n homojunctions represents a promising strategy for effective solar‐driven photocatalytic hydrogen evolution, owing to their inherent advantages of superior lattice matching and minimized charge transfer resistance. However, this approach remains largely unexplored.
Yueqiang Lin   +6 more
wiley   +1 more source

基于改进TOPSIS-RSR法的电能质量综合评价

open access: yesGaoya dianqi, 2018
为解决现有电能质量评价模型的复杂性以及分级评价时的随机性和模糊性,提出了基于改进TOPSIS-RSR法的电能质量综合评价方法。采用熵权法客观计算电能质量指标的权重,运用理想解法(technique fororder preference by similarity to an ideal solution,TOPSIS)对电能质量进行综合评价;提出相对贴近距离的概念,对传统理想解法中存在的某些情况不能比较评价目标优劣性的问题进行改进;用相对贴近距离结合秩和比(rank sum ratio,RSR)法 ...
邱玉婷   +4 more
doaj  

The study of bidirectional DC-DC converter in the DC microgrid [PDF]

open access: yes, 2016
作为新能源的有效利用方式之一的直流微电网没有无功功率的损耗,不需要跟踪频率和相位,可靠性和可控性有较大程度的提高,更适合分布式能源的接入和应用。双向DC-DC变换器承担着母线与储能之间能量双向流动的重要作用。同时,它还可以作为直流微电网之间的互联元件,具有十分重要的研究价值。 本文针对全桥拓扑结构的双向DC-DC变换器展开较为深入的研究。 首先,详细分析了在移相控制方式下,双向DC-DC变换器的在降压方向和升压方向的工作原理及零电压开关(ZVS,Zerovoltageswitching)的具体过程 ...
纪承承
core  

Landscape Composition and Proximity to Water Affect American Badger Occupancy in Shortgrass Prairies 景观组成和与水的距离影响矮草草原中美洲獾的占域率

open access: yesWildlife Letters, Volume 4, Issue 1, Page 23-31, March 2026.
American badgers, a medium‐sized carnivore occurring in much of North America, are important predators in prairie landscapes though our understanding of their habitat use requirements in these areas is unclear. We used a multi‐scale approach to understand American badger habitat use at both local and landscape scales.
Colleen W. Piper   +5 more
wiley   +1 more source

Study and Design of V2G system based on Grid-connected PV Power Generation [PDF]

open access: yes, 2016
随着分布式可再生能源渗透率的不断提高,光伏等可再生能源接入电网的方式更加多样。同时近年来电动汽车飞速发展,解决充电问题已成为当务之急。在减少大规模充电对电网产生影响的同时,将电动汽车作为储能单元参与电网的调峰调频有利于电网的安全经济运行。本文研究基于光伏发电的V2G系统,旨在增加新能源消纳并促进电动汽车的清洁化和低碳化。系统的最大创新点在于实现了光伏发电并网、电动汽车充电与V2G服务的分时复用。 针对家庭单相并网选取了双向两级式的电路拓扑,不仅结构简单而且易于控制。对双向全桥电路和Buck ...
孙纯鹏
core  

Mesoporous Hollow Carbon Spheres/Nanofibers Anchored With Conductive Bimetallic for Efficient Microwave Absorption

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT To break electromagnetic wave absorption (EMA) tech's single‐attenuation bottleneck, enhancing multi‐wave absorption synergy in composites is key for microstructure design. This study uses mesoporous hollow carbon spheres to make metal nanospheres with cobalt, iron, and nickel nanoparticles, then encapsulates them via electrospinning into a ...
Wei‐Lian Zhang   +10 more
wiley   +1 more source

Home - About - Disclaimer - Privacy