Results 21 to 30 of about 5,614 (119)
Gaoya dianqi, 2023 中国正加速构建以新能源为主体的新型电力系统，其在缺少同步机后，没有了阻尼和惯性支撑，会导致系统稳定性下降，因此构网型控制技术（GFM）应运而生。在此基础上基于新能源发电的构网型控制需要某种形式的能量存储与发电装置耦合。此时储能系统（ESS）可在变流器的直流侧或交流侧耦合接入。文中提出了一种基于新能源发电的构网型协调储能控制策略，该策略允许安装在变流器交流侧的ESS具有与安装在变流器直流侧获得的相同的特性和动态行为。此外，所提出的控制还可以协调储能保证系统在新能源不能正常发电时 ...
郑云平 +3 more
doaj
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 1, March 2026.ABSTRACT Hybrid crisis governance – combining hierarchical control with networked collaboration – has gained increasing attention in the public policy and crisis management literatures. Yet, the concept of hybridity remains crude and underdefined, limiting its analytical utility.
Svante Aasbjerg Thygesen +2 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu +8 more
wiley +1 more source
Gaoya dianqi, 2019 异步联网方式下,送端电网的频率稳定问题需要重点关注。在直流系统发生闭锁性故障后,采用直流频率限制器（frequency limit controller FLC）进行故障调频能够抑制送端电网出现的高频问题。文中介绍了直流频率限制器的结构原理以及参数整定方法,并针对直流频率限制器退出时可能发生的"二次动作"现象提出延时及比例参数切换的方法进行优化。最后针对多回直流频率限制器间的协调问题,提出基于直流频率限制器作用系数的控制策略。结果表明 ...
李玲芳 +5 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Ni3S2 has emerged as a promising catalyst for the electrochemical oxidation of biomass‐derived 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor ...
Cheng‐Feng Yi +5 more
wiley +1 more source
Guangtongxin yanjiu, 2019 设计无人机自组网（UANET）媒体接入控制（MAC）协议时,需要考虑其控制开销和数据传输时延,结合现有无线自组网时分多址接入（TDMA）协议和UANET特点,提出一种高效低时延的UANET多跳TDMA协议。采用基于拓扑信息的时隙分配信息高效广播机制降低网络控制开销,同时采用一跳节点二次分配数据时隙以及多维度调度节点时隙分配顺序机制,降低网络平均时延,提高数据传输成功率。仿真结果表明,该协议在无人机节点移动速度较快、拓扑变化频繁时,在消息平均时延、成功率和控制开销等方面的性能优于现有无人机MAC协议。
周逊 +4 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Nanocomposite permanent magnets with reduced rare‐earth content represent a promising class of materials for next‐generation high‐performance applications. However, asynchronous precipitation of soft and hard magnetic phases often results in grain size mismatch and limited coercivity.
Xiaowei Zhang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang +5 more
wiley +1 more source
Gaoya dianqi, 2015 在断路器的永磁机构控制器研发平台上,集成电动底盘车控制、监测、通信等功能。该集成式设计的电动底盘车监控单元采用脉冲调制技术（PWM）控制IGBT的通断时间从而实现电动底盘车的调速控制,采用霍尔电流互感器采集电机电流,实现底盘车运行状态在线监测与综合诊断并支持IEC 61850协议,减少智能电子装置数量和总体成本,提高设备的综合性能。
戴冬云 +4 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The development of high‐performance electromagnetic protection materials integrating broadband absorption and effective shielding capabilities is hindered by challenges in simultaneously optimizing multiple electromagnetic properties through conventional material designs.
Changlong Du +9 more
wiley +1 more source