Results 21 to 30 of about 1,309 (155)
Research on Flexible Interconnection of Urban Power Grid [PDF]
, 2023 [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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全球能源互联网, 2019 模块化多电平换流器是柔性直流输电技术中的重要组成部分，柔性直流电网中直流过电压对整个系统的危害很大，因此对换流器闭锁退出运行后出现过电压进行仿真和机理分析。分析了换流器中子模块的6种工作状态和MMC的等效模型，根据换流站类型分为送端和受端换流站两种情况，基于PSCAD/EMTDC平台仿真换流器因故障闭锁后直流电压的变化情况，并根据等效电路分析换流站端口直流电压的动态发展过程和机理。由仿真结果发现，PSCAD/EMTDC仿真软件具有一定的缺陷，不能真实地反映断路器的断开，会产生虚拟过电压 ...
李英彪 +4 more
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, 2023 在推动中国新能源高质量跃升式发展背景下，大规模新能源开发、汇集和远距离输送成为新能源建设的重要路径之一，特大型新能源基地成为未来的重要形态。由于缺少常规交流同步发电机组和可靠备用容量，特大型新能源基地稳定性挑战、新能源利用率与供电充裕性矛盾凸显，其形态结构及演化路径成为当前关切的热点问题。系统梳理了当前最新学术研究成果，研判特大型新能源基地未来可能的源网形态并做特征分析；进一步，面向特大型新能源基地系统强度弱、灵活性不足、源网协调运行矛盾突出等挑战，针对性提出源网协调规划 ...
张玮 +5 more
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Research on the Design of Operating Condition of Multi-Resistance Superconducting DC Current Limiter [PDF]
, 2023 [Introduction] The working principle of the resistive superconducting current limiter is based on the zero resistance effect of the superconductor, which is connected in series in the line and basically has no resistance during normal operation. When the
Jinchuan GUO, Qin YIN
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多端VSC-HVDC风电送出系统的低电压穿越综合策略设计 [PDF]
全球能源互联网, 2019 基于含风电接入的VSC-HVDC输电系统网侧换流站的基本结构，提出了接入交流电网发生三相短路时风电送出系统的低电压穿越综合控制策略。通过切换网侧换流站控制策略，并与chopper电路配合，实现网侧故障换流站向交流电网提供无功支撑，同时网侧非故障换流站和直流chopper电路协同泄放系统冗余功率，而风电场侧换流站始终维持风电场侧电压稳定。仿真分析表明，该策略可以保障系统送电端的风电场在故障期间正常运行并维持直流母线电压的稳定。在电压跌落幅度较小时可维持系统的有功输出以及无功支撑 ...
姜山 +5 more
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Research on the Application of Digital Twin Technology in Power Grid Engineering [PDF]
, 2023 [Introduction] In view of the digital transformation under the development of big data and the Internet, the application status of digital twin technology in power grid engineering is analyzed.
Hao ZHANG +4 more
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Characteristics Analysis and Technical Prospect of Low-Frequency Main Transformer for Offshore Wind Power [PDF]
, 2023 [Introduction] Low-frequency alternating current power transmission technology has attracted wide attention. Although its theoretical research continues to go deeper, there are still many problems to be solved before its engineering implementation in ...
Jutian LI +4 more
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Dianci bileiqi, 2021 LCC-VSC混合直流系统结合了LCC输送大容量电能,VSC适用于向弱交流电网系统输电且不发生换相失败的优点,使输电形式更加灵活。阀过电压是LCC直流换流站重要的一种过电压。建立了一个送端为LCC换流站,受端以MMC换流阀为换流器的VSC换流站的直流过电压计算模型,仿真了逆变侧有无阻断二极管两种条件下混合直流系统中LCC换流站阀过电压,并结合传统两端LCC直流系统中阀过电压的产生机理,对比传统直流阀过电压计算结果,分析了阀过电压受逆变侧VSC换流站的影响机理 ...
王磊, 何慧雯, 王东举, 周姣
doaj
Design and Development of 5G+ Robot Autonomous Patrol Inspection System in Intelligent Power Plant [PDF]
, 2023 [Introduction] In order to change the current patrol inspection mode of power plant mainly based on manual patrol ins-pection, improve the intelligent level of power plant patrol inspection, and fully grasp the design method of robot autonomous patrol ...
Bin FENG +5 more
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Discharge characteristics and discharge simulation model of long air gaps containing a floating conductor [PDF]
, 2022 Long air gaps containing a floating conductor are common insulation types in power grids. During the transmission line live-line work, the process of lineman entering the transmission line air gap constitutes a live-line work combined air gap, which is a
Gao, Jiachen <1995>
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