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面向调频应用的扁管式可逆固体氧化物电堆控制特性分析 [PDF]

open access: yes全球能源互联网, 2022
良好的电化学动态响应性能以及功率输出的长期耐久性是高温可逆固体氧化物电池(reversible solid oxide cell,RSOC)应用于调频等电力辅助服务的技术基础。针对一种新型内嵌微流道的扁管式电堆,从调频控制的角度,试验考察了RSOC电堆的发电/电解工作控制特性、负荷动态响应特性以及长时间运行衰减特性。结果表明,新型电堆燃料传质特性良好,可优先选择氢气流量、水氢比、工作温度等参数实现对应发电/电解模式下的调频应用控制。在温度控制不变的情况下,动态试验表明了新型电堆受传质/传热影响 ...
高丹慧   +6 more
doaj   +1 more source

不同时频特性近断层地震作用下的结构响应研究

open access: yesDizhen xuebao, 2022
研究不同时频特性的地震波作用下,抗震结构和隔震结构耦合设备的动力响应,对五层钢框架振动台模型试验数据进行小波分析。结果表明:主结构动力响应与地震波时频特性直接相关;由于主结构和隔震支座的滤波作用,设备的动力响应受地震波时频特性影响显著,但不具有直接相关性;隔震结构可以使设备的频率远离主结构的频率,从而降低设备的放大系数;设备耦合之后主体结构加速度的变化趋势取决于不同时频特性的地震波能量分布。
Miao Han   +3 more
doaj   +1 more source

真空断路器电机操动机构RBF-PID控制方法研究

open access: yesGaoya dianqi, 2022
为提高真空断路器分合闸性能和智能化操作水平,提出了适用于真空断路器电机操动机构的RBF-PID控制方法,结合有限转角永磁无刷直流驱动电机动态数学模型,分析了驱动电机转速响应特性和运动过程可控性,构建了电机操动机构神经网络控制方程,对PID控制参数进行优化整定,分别计算分析常规PID和RBF-PID控制方法作用下真空断路器操作速度的跟踪特性。研制了电机操动机构速度控制系统,开展了真空断路器电机操动机构速度跟踪特性实验,结果表明,采用RBF-PID控制方法可以有效降低速度跟踪误差 ...
史可鉴   +5 more
doaj  

The characteristics of hydro-dynamics and sediments in the strait channels of Zhoushan Islands area(舟山群岛峡道水动力及沉积特性)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2001
本文根据浙江舟山群岛地区金塘水道、册子水道、虾峙门水道和灌门水道的水文泥沙和沉积资料,以峡道水动力特性为出发点,分析了峡道环境中的水文泥沙特性和沉积特性,初步探讨了沉积峡道效应,文章指出,沉积峡道效应是指在峡道环境中,受峡道水动力特性及其影响下的泥沙运动作用,在峡道中所形成的沉积特点和变化过程.这种变化既不同于受单向水流作用的河流环境,也不同于受盐淡水共同作用的河口环境,也有别于开敞的海岸环境.峡道沉积的重要特点在于,在垂直于水流运动方向的横向上,存在显著的沉积相变.
JIANGGuo-jun(蒋国俊)
doaj   +1 more source

传动机构对高压断路器动作特性的影响分析

open access: yesGaoya dianqi, 2015
高压断路器中常常采用不同的传动机构来连接灭弧室本体和操动机构,实现分闸、合闸与自动重合闸操作,同时传动机构又会对其动作特性产生影响。笔者从介绍某高压断路器传动机构的工作原理入手,并对断路器机械特性的测试结果进行分析,其次论述传动机构刚性差对断路器动作特性的影响,提出提高传动机构刚性的有效措施,最后通过提高传动机构刚性后的试验结果进行验证。
王永良, 彭新奇, 程铁汉, 张博
doaj  

配电系统MOA特性与其限压性能和动作负载关系的探讨

open access: yesDianci bileiqi, 1994
配电系统中MOA特性对其限压性能和动作负载的影响很大。本文以弧光接地过电压为例,研究MOA特性参数与其限压性能、能量吸收和流过电流之间内在的关系和规律,为MOA限压性能和动作负载的校核提供一种方法和理论依据,所得结果可供MOA的选型和设计制造参考。配电系统,MOA,特性,限压性能 ...
李谦, 王晓瑜, 招誉颐
doaj  

组合电器中熔断器撞击器动作特性的研究

open access: yesGaoya dianqi, 1997
通过对组合电器中熔断器撞击器在配合特性中的作用分析及动作特性的研究,认为熔断器撞击器动作的快慢也是影响组合电器所需开断的转移电流值的因素之一,撞击器动作时间t0与通过撞击器的电流值有关,其动作特性是一条反时延曲线。对弹簧型撞击器 ...
金立军, 马志瀛, 徐黎明
doaj  

带气动操动机构GIS断路器振动特性仿真研究及改进

open access: yesGaoya dianqi, 2017
文中采用建模和仿真方法对安装于某水电厂的某一带气动操动机构的330 kV GIS断路器分、合闸操作异常振动问题展开研究。首先,建立了带气动操动机构断路器的运动模型,仿真分析了其操作时的振动特性及气动机构工作气压变化对振动特性的影响。然后,又对带液压操动机构断路器操作时的振动特性展开了建模和仿真分析。部分仿真结果也与试验结果进行了对比,能够较好吻合。通过对带两种不同操动机构断路器振动特性仿真结果的对比发现:液压操动机构断路器的振动强度比气动机构的要小,而且液压机构断路器振动强度的衰减速度更快 ...
杨鼎革   +6 more
doaj  

基于调度自动化系统的断路器动作特性研究及其状态评估

open access: yesGaoya dianqi, 2019
针对现阶段调度自动化系统对断路器运行参数关注不够这一现象,对调度自动化系统中有关断路器运行参数进行了深度挖掘。引入了断路器动作时间特性修正参数△t和保护装置出口延时t延时,并对断路器动作时间特性修正参数△t和保护装置出口延时t延时的稳定性进行了评估。通过引入断路器动作时间特性修正参数和保护装置出口延时,提出了基于调度自动化系统的断路器动作时间特性模型。通过大量试验验证表明基于该模型的断路器分、合闸时间服从于正态分布。最后,制定了某型号高压126 kV SF6断路器和中压真空断路器的状态评估策略 ...
刘少辉   +5 more
doaj  

自动照相系统在野生动物调查中的应用

open access: yes野生动物学报, 2010
概述了自动照相系统的工作原理,介绍了该技术在国内外野生动物调查中的现状,同时还结合作者近几年的研究体会,分析了自动照相系统用于野生动物调查时的特点和存在问题及今后发展的趋势。作者认为,这项技术虽仍有不足,但由于自动照相系统所具有的客观性、隐蔽性、非损伤性及监测的长期性等特点,将来会在野生动物调查中具有非常重要的应用价值和可观的应用前景。
封托, 王静, 张洪峰, 吴晓民
doaj  

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Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47