Results 1 to 10 of about 1,721 (109)
针对中国第一个海上风电柔性直流送出工程—江苏如东工程,从系统拓扑方案构建、过电压与绝缘配合、系统功率盈余问题与交流故障穿越技术以及控制保护技术等方面开展了深入研究,构建了轻型紧凑化的海上风电柔性直流系统拓扑方案,取消了海上换流站的启动回路与接地回路等;提出了海陆换流站的避雷器配置方案与参考电压的选取原则,形成了海陆换流站的绝缘配合方案的典型范式;提出了集中式、分布式、混合式直流侧有功功率动态平衡装置的典型拓扑方式,解决了陆上换流站交流侧故障穿越难题;提出了工程的整体控制保护方案 ...
卢亚军 +6 more
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Research on Flexible Interconnection of Urban Power Grid [PDF]
[Introduction] Due to its flexibility and rapid control ability, voltage source converter based high voltage direct current (VSC-HVDC) technology can be used in asynchronous grid interconnection, renewable energy grid-connection, and urban grid power ...
Jinchuan GUO +3 more
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Application and Prospect of Flexible Transmission and Distribution Technology in Internet Data Center [PDF]
[Introduction] As an important thrust of China's "new infrastructure", internet data centers have ushered in opportunities for vigorous development and become new areas of energy use, putting forward higher requirements for the power supply level and ...
Deyang CHEN +7 more
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为减少多雷区用110 kV复合绝缘子雷击闪络次数,文中在110 kV复合绝缘子上加装悬浮中间均压环,研究其是否具有提升绝缘子耐雷水平的作用。试验测定了正负极性标准雷电冲击电压下的U50击穿电压,并使用高速摄影仪记录了放电过程。结合电场仿真,对得到的试验结果进行了讨论。结果显示,靠近正极性固定电位均压环布置的悬浮中间均压环具有提升绝缘子耐雷水平的作用,文中布置方式下最高提升约10%,并伴随有绕过均压环放电现象的发生。结果表明,采用悬浮中间均压环可以提高110 kV复合绝缘子耐雷水平 ...
卢明 +5 more
doaj
Bird's Nest Target Image Detection Model for Transmission Lines in Complex Environments [PDF]
To solve the problems of low accuracy, high false and missed detection rates, and the inaccurate positioning of birds' nests by power inspection drones in complex environments, an improved YOLO-nc-kd model, designed to detect birds' nests on transmission
Naiwei TU, Meng JIAO, Xin YAN
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Summary of Desert Photovoltaic Power Transmission Technology [PDF]
To achieve carbon peaking and carbon neutrality goals and improve energy efficiency, new energy plays a major role in China strategic deployment. However, as centralized photovoltaic is located in desert areas, photovoltaic power transmission has become ...
CHU Shuai +5 more
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ABSTRACT For over 30 years, the northern Mexican state of Chihuahua bordering Texas and New Mexico has experienced and witnessed multiple forms of violence across its rural and urban regions. Communities are besieged with cartel and gender‐based violence and the saturation of international corporations that pay less than livable wages for workers in ...
Sylvia Fernández Quintanilla +1 more
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Research and simulation of resonant earthed system Based on IPC [PDF]
我国中压配电网,绝大多数采用中性点不接地方式。这种接地方式最大的优点是:当发生单相接地时,三相线电压的对称性没有被破坏,所以用户用电不受影响,可维持一定长的时间。但是,当配电网达到一定规模,对地电容电流达到一定数值后,必须采取加装消弧线圈的措施来保证配电网的安全。 配电网中性点采用消弧线圈接地的方式,对于改善电网供电质量、提高供电可靠性和保证整个系统安全运行都有十分重要的意义。本文在此背景下,对谐振接地系统展开研究与仿真。首先介绍了中性点接地方式的发展过程,通过对谐振接地原理和单相接地故障的分析 ...
柯远青
core
Research and Simulation of Resonant Grounded System Based on Controlled Magnetic Flux [PDF]
我国中压配电网,绝大多数采用中性点不接地方式。这种接地方式最大的优点是:当发生单相接地时,三相线电压的对称性没有被破坏,所以用户用电不受影响,可维持一定长的时间。但是,当配电网达到一定规模,对地电容电流达到一定数值后,必须采取加装消弧线圈的措施来保证配电网的安全。 配电网中性点采用消弧线圈接地的方式,对于改善电网供电质量、提高供电可靠性和保证整个系统安全运行都有十分重要的意义。本文在此背景下,对建立大范围连续调节电感电流、谐波较少的消弧线圈补偿模型 ...
桂亮
core
随着我国城市电力系统的不断发展,各种电压级别的配电站数量日益增加,对配电线路的运行安全也提出了新 的要求。10kv 配电线路是确保城市工农业及生活用电的重要基础设施,在促进经济发展、改善人们生活方面发挥着至关重 要的作用。但由于10kv 配电线路结构复杂、绝缘水平较低,在雷电活动频繁的地区时常会发生配电线路雷击事故,这不仅影 响到配电线路的运行,给工农业的发展带来损失,而且还可能导致配电设备和用户设备的损坏,造成大面积的停电。因此, 加强10kv 配电线路的防雷研究力度就显得十分重要了。
军 孙, 埔 苗
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