Results 81 to 90 of about 362 (143)
Dianci bileiqi, 2019 在线采集避雷器泄漏电流,研究避雷器智能预警算法,提前预警避雷器缺陷。本文设计一种基于时间序列和趋势分析的特高压变电站避雷器缺陷预警系统,该系统采用无源零磁通互感器采集避雷器泄漏全电流并通过LoRa无线通信传输给通信中继单元,通信中继单元采集对应母线CVT信号结合全电流数据计算阻性电流,通信中继单元将监测和计算数据通过第二级LoRa无线通信传输给系统后台,系统后台对采集的数据进行存储和分析。该系统在特高压交流变电站进行安装验证,结果表明:设备安装快捷,施工方便,降低现场施工风险;监测数据准确 ...
王宏伟 +5 more
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Influencing Factors of Generation Efficiency of Vertical Gravity Energy Storage [PDF]
[Objective] As a new type of energy storage means, shaft-type gravity energy storage technology has unique advantages of low environmental pollution, low construction cost and high efficiency, and has a wide application prospect, but the research on the ...
Hao WANG +7 more
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Energy Storage Configuration Considering the System Wind Power Reserve Capacity Under High Wind Power Permeability [PDF]
The high proportion penetration of the wind power weakens the inertia and frequency regulation capacity of the power system. The energy storage system (ESS) is widely used in the inertia support and frequency regulation of the power grid with the ...
LIU Hongbo +4 more
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Gaoya dianqi, 1997 据美国能源部报道:今后15年内,煤炭仍然是全球的主要能源,对燃煤发电厂的投资将占电厂总投资的1/3。1995～2000年间,全世界的发电能力会新增加1.19TW,中国新增0.231TW（其中燃煤电厂0.155TW,天燃气电厂0.02TW,水电厂0.074TW,核电0.01TW）。 国家计委、国家科委和国家经贸委共同制定的《新能源和可再生能源发展纲要》,对“九五”至2010年的发展目标、任务及相应对策和措施作了规定,与电力有关的项目有:1)加快小水力能源的开发;2)扩大太阳能的开发利用,建立光伏发电站 ...
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Gaoya dianqi, 2012 笔者设计了一套基于虚拟仪器的GIS局部放电声电联合检测系统,通过不同速率的数据采集模块对GIS局部放电过程中所产生的超高频、高频电流以及超声波信号进行多通道同步联合检测。系统基于LabVIEW虚拟仪器平台开发,可连续捕捉与采集存储局部放电脉冲波形信号、实时计算放电脉冲相位。利用采集的局放信号进行时频分析和模糊聚类实现了多源局放的有效分离和类型判断,同时基于多路局部放电超高频信号与超声波信号本身或两者之间的时差可实现局部放电源的定位。该系统已在多个220 kV及500 kV ...
张天辰 +5 more
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Aerodynamic Drag Characteristics and Optimization Design of Ultra-High Speed Multi-Car in Gravity Energy Storage Shaft [PDF]
[Objective] As a physical energy storage method characterized by both environmental protection and economic efficiency, gravity energy storage is expected to become an important support for the sustainable development of renewable energy in the future ...
Hao LI +7 more
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Countermeasures for the Development of China's New Highway Transportation-Energy Integrated System [PDF]
[Introduction] China's transportation sector is a significant contributor to carbon emissions. To achieve carbon peaking and neutrality, developing a new transportation-energy integrated system based on energy Internet is a crucial step for the low ...
Can ZHANG, Mingzhen ZHANG
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Gaoya dianqi, 2018 电子式互感器的数字输出校验是智能变电站的可靠运行中重要的环节。中国幅员辽阔季节变换时温度变化较大,根据高寒地区特殊使用情况,提出一种C++语言开发基于IEC 61850-9-2协议的电子式互感器校准系统及配套报文分析子软件的新思路。针对其特殊使用用途,硬件通过低温环境电子器件的选型等改进措施提高了校准装置精度和稳定性;软件通过希尔伯特变化算法解决了采用罗氏线圈的互感器微分环节的影响,并通过准同步算法有效地降低电网频率波动的非同步采样对误差结果的干扰,多线程工作机制保证了校准系统在采样、报文解析、算法 ...
毛安澜 +5 more
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Multi-Time Scale Optimization Strategy for New Distribution System Oriented to Photovoltaic Consumption and Low Carbon Demand Response of Ice Storage Air Conditioning Groups [PDF]
ObjectivesIn view of the limitations of the traditional distribution network demand response model in regulating the flexible and controllable resources on the load side, especially ignoring the unique and efficient resources such as ice storage air ...
GUO Junhong +5 more
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Gaoya dianqi, 2014 在提出的基于金属化膜的输电线路电晕损耗监测方法基础上,研制了一套在线监测系统,它包括主机、导线电压采集模块和电晕电流采集模块3部分。电晕电流采集模块放置在高压输电线上,采集各分裂导线的电晕电流转化的电压信号,该信号由并联在薄膜金属镀层和分裂导线之间的采样电阻得到。电压采集模块放置在变电站内,采集输电导线的电压。2个模块的采集由GPS的秒脉冲上升沿触发同步,且均通过GPRS无线传输方式将数据传输至移动通讯网的公共端口。远端上位主机通过有线网络访问该公共端口,将其存储的电压 ...
王明松 +6 more
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