Results 31 to 40 of about 8,001 (171)
Gaoya dianqi, 2013 随着国家电网公司坚强智能电网建设脚步的加快,智能变电站建设正在全面铺开。各种电子式互感器（ET）作为传统电磁式互感器的换代产品在试点项目中暴露出了一些问题,尤其是当前应用较多的激光供能型电子互感器,由于高压侧一次转换器供能方式存在问题,降低了运行可靠性。笔者介绍了一种独特的电子式组合互感器（ZET）,该互感器将传统倒立式SF6气体绝缘电流互感器的绝缘结构与新型传感原理结合起来,互感器采用在低压侧地电位直流供电和信号采集方式,大大提高转换器供能稳定性。实际应用证明,该互感器可靠性高、稳定性好、频率响应宽 ...
蒋汉儒 +7 more
doaj
Research on borehole transient electromagnetic positioning method of azimuthal coil scanning detection [PDF]
The borehole transient electromagnetic method is used to detect the long-range water-bearing bodies around the borehole wall by using the advanced water exploration borehole in the heading roadway, which avoids the “one’s opinion in one hole” because the
Chenglin JIANG +3 more
core +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT With the increasing number of Chinese international students in Australian universities, intercultural competence has become a critical factor influencing their interactions with Australian tutors in university classroom settings. Existing research often examines students’ intercultural competence from a single‐method or single‐perspective ...
Jiangyu Han, Linda Tsung
wiley +1 more source
Application of MSP430-based on Three-phase Electric Power Monitor System [PDF]
, 2007 介绍了以MSP430F149单片机为核心,一种实现电力参数交流采样技术的基本算法,并对其硬件和软件的结构进行了详细地阐述。该监测设备结构简单、误差小、测量精确、价格低,可以作为测试仪器使用,也可以作为监控装置。A basic calculating method used in AC sampling for electric parameters with MSP430F149 single chip microcomputer are introduced in the paper,and ...
彭侠夫, 曾兴赠, 罗松涛
core +3 more sources
Gaoya dianqi, 2017 光纤电流互感器（FOCT）克服了传统电磁式电流互感器在暂态响应、绝缘等方面的弱点,满足现代电力工业对电流值实时精确测量的需求。为了确保电流互感器在准确测量电流参量的同时,具有低故障、高可靠性的特点,急需开展光纤电流互感器状态诊断技术研究。通过分析光纤电流互感器测量数据的时域及频域特征,建立关键部件物理特性与互感器数据特征之间的对应关系,构建基于Allan方差的光纤电流互感器状态诊断分析模型,根据Allan方差计算结果诊断互感器状态,并实现自身故障定位。仿真结果表明 ...
周刚 +4 more
doaj
Research on the Polarimetric All-Fiber Optical Current Sensor Based on the Faraday Effect [PDF]
, 2007 光学电流互感器（OCT）是新型的电流互感器，它克服了传统电流互感器的许多缺点，在电力系统中具有广阔的应用前景。本文在全面分析和总结OCT发展历史和现有技术水平的基础上，针对实用化要求，确定以光纤电流传感器为研究重点。 光纤因弯曲引入大量的线性双折射，这降低了光纤电流传感器的灵敏度，严重时甚至完全淹没法拉第磁光效应。本文采用退火光纤来做传感光纤，这样不但可以消除由于弯曲引入的线性双折射，还可以降低光纤内在线性双折射。针对反射式光纤电流传感器采用两种集成器件：一体化光纤起偏旋转器件（P-FR ...
张海
core
Journal of Sociolinguistics, EarlyView.ABSTRACT This study investigates how ordinary Taiwanese netizens perform linguistic authority by policing others’ use of Mainland Chinese expressions in everyday online interactions not originally intended to be political and how such policing is subsequently supported, resisted, or (de)legitimized in the context of Taiwan–China relations. Three orders
Hsi‐Yao Su
wiley +1 more source
Gaoya dianqi, 2006 Rogowski线圈电流互感器是一种新型电子式电流互感器。与传统的电流互感器相比,它具有动态范围大和测量频带宽的特点,但它的温度特性、长期稳定性不及传统互感器。全数字化设计旨在更进一步提高互感器的性能,它包括数字积分、数字传输、数字化处理和数字输出4个部分。即除了传感头以外,互感器的其余部分均为数字形式。对全数字化设计的Rogowski线圈电流互感器进行了准确度试验和数字输出接口试验。试验结果表明,该数字化设计满足IEC标准关于0.2级互感器的精度要求以及数字输出的相关要求。
陈金玲, 李红斌, 冯凯
doaj
基于Maxwell2D/3D的多线圈磁模型建模与仿真 [PDF]
, 2011 多线圈变压器可以实现多对多电池间电荷均衡,实现快速、安全、低损耗的电池充放电均衡,是一种智能控制的串联电池组双向均衡方式。根据动力锂电池均衡控制策略的需求,分析了多线圈变压器的等效电路以及磁交叉耦合问题,并通过有限元电磁场分析软件AnSOfTMAXWEll进行了验证 ...
廖乐平 +3 more
core
Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics [PDF]
【Objective】Optical fiber sensors, featuring compact size, lightweight design, and electromagnetic interference immunity, show significant potential in power system applications. To meet the temperature-monitoring requirement for the movable contacts of a
LIU Shengnan +4 more
core +1 more source