Results 51 to 60 of about 19,672 (168)
Gaoya dianqi, 2000 采用测量Ａ相电流和Ｂ、Ｃ相电压计算系统无功功率的方法，根据无功功率确定补偿量而不是根据功率因数ｃｏｓΦ，克服了根据功率因数补偿的一些缺点。利用乘法器来实现控制电路设计。控制电路采用了七级补偿方式，经编码器输出８４２１编码，分别控制三组电容器，可组合投切７档不同的电容量，增加补偿精度，减少了电容器的投资。
江秀臣, 李锋, 郭效金
doaj
The Design Of Reactive Power Compensation Controller Based On ARM Processor [PDF]
, 2008 随着国民经济的快速增长，国家对于电能的需求不断增加，各种用电设备所需要的无功功率也会随着不断增加。无功功率在电网中的分布越来越复杂，会对电能造成极大的浪费。基于此，电力系统的无功功率补偿作为电力系统与自动化领域的一个很重要的研究课题，就具有特别重要的意义。本文从介绍无功补偿的现实意义出发，分析了无功补偿的必要性，简单介绍国内外无功补偿技术的研究现状，探讨无功补偿的几种方式以及无功补偿的基本原理，具体阐述基于ARM的低压电网无功补偿控制系统硬件及软件设计。在硬件设计方面 ...
朱俊青
core
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
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Organic‐inorganic metal halide perovskite solar cells (PSCs) are promising for photovoltaics due to their excellent optoelectronic properties. However, achieving high efficiency and stability remains challenging, mainly due to defects and energy losses at the electron transport layer (ETL)/perovskite interface.
Jiahui Jin +8 more
wiley +1 more source
Analysis of Active Power Measurement Error [PDF]
, 2014 用对称分量分析了三序功率与三相功率间的关系,得出三相功率是同一相序的电压与电流的对称分量函数;三相电路平衡时,用两瓦法能正确测量三相三线电路功率,当三相四线电路不平衡时,用两瓦法测量功率存在误差。Using symmetrical components,this paper analyzes the relationship between 3-sequence power and 3-phase power and concludes that 3-phase power is a function ...
吴舒萍, 许建安, 黄兴平
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Transition metal‐based amorphous/crystalline (a/c) heterostructured catalysts have garnered significant attention due to their exceptional activity, stability, and cost‐effectiveness. However, the precise synergistic regulation of interfacial composition and phase states remains challenging.
Haoran Li +3 more
wiley +1 more source
Jixie chuandong, 1990 控制式差动无级调速装置从功能上可以分为精密调速型、扩大调速范围型和过零调速型三种。本文提出了各种不同的调速功能所应满足的传动参数条件,对装置内的功率流进行了深入的探讨,并且采用方法对各种功能的控制式无级调速装置的效率进行了分析,揭示了传动参数、调速功能、功率流、效率等诸方面的联系。在此基础上,本文分析了在考虑摩擦和功率损失的情况下,控制式差动无级调速装置内部实际功率流的大小:提出了研究这种装置的输出机械特性的途径:井且探讨了装置内无级变速器的滑差率对装置传动特性的影响 ...
张淳, 周令华
doaj
Optimal Capacity Configuration Method for Multi-Microgrid System Utilizing Wind-Solar-Electric-Hydrogen Hybrid Energy Storage [PDF]
ObjectivesIn order to study the problems of increasing complexity of power balance, and increasing uncertainty of power flow distribution and increasing security and stability requirements of power grid caused by high proportion of renewable energy ...
HUANG Yanming +3 more
core +1 more source
International Journal of Applied Linguistics, Volume 36, Issue 1, Page 322-335, February 2026.ABSTRACT Most research into the relationships of linguistic complexity and accuracy to functional adequacy has focused on either spoken or written mode. The current study extended previous studies by investigating these associations across both modalities and how the nature of these relationships was influenced by learners’ L2 proficiency and task type.
Xiaojun Lu, Yui Suzukida
wiley +1 more source
Gaoya dianqi, 2016 为了改善直流逆变站的无功功率特性,合理利用直流系统本身的无功调节特性来提升弱受端系统的电压稳定性,对直流控制方式与逆变器无功需求之间的关系进行了比较详细的分析。基于弱受端直流系统模型,首先根据直流系统Ud-Id特性曲线分析得到直流系统各种可能的控制模式下的无功特性,以及各控制模式对无功功率的调节能力;然后分析了熄弧角裕度、VDCOL参数、控制器调节速度这3种因素对逆变器无功调节的影响,并根据仿真结果总结了它们的调节规律及作用范围。对弱受端直流系统无功调节策略的确定具有一定的指导意义。
李妮 +4 more
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