Results 61 to 70 of about 1,281 (148)
Study on Double Phase-Locked Loop on the Synthetic Inertia Control of Offshore Wind Farm Frequency Regulation [PDF]
To build the new power system with the main body of new energy, the offshore wind farm (OWF) is an important part and has been rapidly developed in coastal cities.
CAI Chuanwei +5 more
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Gaoya dianqi, 2018 基于半桥子模块拓扑的模块化多电平电压源换流器（HBSM-MMC）和直流断路器构建的柔性直流电网能够实现大规模新能源的并网和消纳,发展前景良好。柔性直流电网技术的发展主要限制于高压直流断路器,因此对高压直流断路器开断过程以及开断能力影响因素的研究十分有必要。文中首先研究了适用于HBSM-MMC柔性直流电网的模块化混合型高压直流断路器运行原理;并在此基础上详细分析了模块化混合型直流断路器开断时间的影响因素;然后研究了直流断路器过电压的影响因素;最后在PSCAD ...
张军, 吴金龙, 王先为, 姚为正
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Gaoya dianqi, 2020 多端柔性直流输电系统直流侧发生故障时故障电流较大,需要在直流侧配置限流装置。文中以南澳多端柔性直流输电工程为例,首先在PSCAD/EMTDC平台上搭建了含电阻型超导限流器的南澳多端柔直工程仿真模型;其次,在模拟系统直流侧发生极间短路故障工况下,对比分析最大阻值不同的电阻型超导限流器的限流能力,从而确定了限流器的最大阻值;进而,模拟系统直流侧发生负极接地故障,对比分析了未接入限流器和接入限流器两种运行工况下的线路电流电压仿真曲线;仿真结果表明,电阻型超导限流器能有效抑制短路故障电流 ...
金晶, 殷勤
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Gaoya dianqi, 2023 海上柔直换流阀的尺寸重量直接关系海上换流平台设计制造、制造成本，换流阀轻型化设计将是产品主要攻克技术之一。文中通过分析±500 kV 2 GW海上柔直换流阀常规设计，对比分析传统支撑式换流阀的结构特征；从功率模块、阀段和阀塔3个层面分析轻型化柔直换流阀设计方法，并通过采用有限元法仿真验证其工程可实施性，凸显其技术优势，对海上柔直换流阀推广应用具有重大影响。
郑全旭 +5 more
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An analysis method for the maturity of power technology based on literature search [PDF]
China’s power industry has gone through a period of rapid development. With the transformation of the global energy structure, the development goal of building a new type of power system was proposed, which pointed out the direction for the next stage of
HE Dongshan +5 more
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Research on Coal Calorific Value Prediction Based on K-Means Clustering and Ridge Regression Algorithm [PDF]
ObjectivesThe calorific value of coal is one of the important evaluation criteria for measuring coal quality, and is also the main basis for valuation of power coal.
CHEN Heng +4 more
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Dianci bileiqi, 2020 为了保护柔直输电系统的全控性电力电子元件,在柔性直流换流站的桥臂和换流阀侧会安装避雷器。为了评估避雷器的运行状态,在每一台避雷器上安装了泄漏电流在线监测装置。依托厦门柔直输电工程,统计研究了两个换流站的各个位置避雷器从2016年到2018年5月的泄漏电流监测数据,发现了泄漏电流随着负荷增加而增加的现象。在此基础上对监测表计进行了强谐波下的检测,发现针对交流避雷器设计的监测表计用在柔直避雷器泄漏电流的在线监测上,存在较大测量误差,此外,柔直站运行时产生的大量谐波也是影响其电流监测数据的主要原因。
方超颖 +5 more
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A Frequency Regulation Method of Energy Storage System Based on Adaptive Adjustment of Virtual Synchronous Generator Control Parameters [PDF]
ObjectivesThe large-scale penetration of wind power has reduced the frequency regulation capability of the power system to a certain extent.As a relatively mature and effective technical means, the energy storage system is widely used in power grid ...
LI Bo +4 more
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Economic Analysis of Offshore Wind Power in Grid Parity Stage in Guangdong Province [PDF]
[Objective] Offshore wind power is one of the important ways to achieve carbon peaking and carbon neutrality in the future, and has a good development prospect.
Rui ZHAO, Ying CHEN
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Gaoya dianqi, 2021 800 kV特高压混合多端柔性直流输电工程的柔直换流站采用柔直阀组串联的形式,每个柔直阀组均由一定比例的基于MMC结构的半桥功率模块和全桥功率模块组成。MMC换流阀结构中包含电容器组,投入工作前必须先完成换流阀充电才能正常工作。在柔直换流站进行运行方式转换时,可能出现第二阀组投入的情况,此时第二阀组直流端口处于短路状态,不能使用传统的充电策略。文章分析了第二阀组投入时的充电问题,提出了一种用于柔直换流站第二阀组的充电策略,并在厂内±10 k V半桥/全桥混合型MMC样机上开展实验验证 ...
涂小刚, 宋志顺, 常立国, 洪俊
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