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Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
《能源前沿(英文)》 2014年 第8卷 第3期 页码 386-393 doi: 10.1007/s11708-014-0323-9
关键词: high voltage (HV) grid frequency stability parameter identification primary frequency regulation (PFR)
Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery
Tong Zhang, Elie Paillard
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 577-591 doi: 10.1007/s11705-018-1758-z
Lithium-ion batteries are a key technology in today’s world and improving their performances requires, in many cases, the use of cathodes operating above the anodic stability of state-of-the-art electrolytes based on ethylene carbonate (EC) mixtures. EC, however, is a crucial component of electrolytes, due to its excellent ability to allow graphite anode operation–also required for high energy density batteries–by stabilizing the electrode/electrolyte interface. In the last years, many alternative electrolytes, aiming at allowing high voltage battery operation, have been proposed. However, often, graphite electrode operation is not well demonstrated in these electrolytes. Thus, we review here the high voltage, EC-free alternative electrolytes, focusing on those allowing the steady operation of graphite anodes. This review covers electrolyte compositions, with the widespread use of additives, the change in main lithium salt, the effect of anion (or Li salt) concentration, but also reports on graphite protection strategies, by coatings or artificial solid electrolyte interphase (SEI) or by use of water-soluble binder for electrode processing as these can also enable the use of graphite in electrolytes with suboptimal intrinsic SEI formation ability.
关键词: lithium-ion electrolyte solid electrolyte interphase additives high voltage graphite
Hani BENGUESMIA, Nassima M’ZIOU, Ahmed BOUBAKEUR
《能源前沿(英文)》 2021年 第15卷 第1期 页码 213-221 doi: 10.1007/s11708-017-0479-1
关键词: 1512L insulator circular model artificial pollution flashover leakage current discontinuous pollution high voltage
Development and advances in modular multilevel converter based HVDC projects in China
《工程管理前沿(英文)》 2023年 第10卷 第1期 页码 183-189 doi: 10.1007/s42524-022-0248-7
关键词: high voltage direct current power converter power systems renewable energy ultra-high voltage
Xiaoqiang SHAN, Fenghua GUO, Wenqian XU, Xiaowei TENG
《能源前沿(英文)》 2017年 第11卷 第3期 页码 383-400 doi: 10.1007/s11708-017-0485-3
关键词: manganese oxides Mn5O8 high voltage aqueous Na-ion storage
王萍,孙栩,宋良瑜
《中国工程科学》 2005年 第7卷 第4期 页码 59-63
通过n个倍流整流结构交错并联方式用以进一步减小纹波电流。给出了电路的开关信号波形和仿真模型,并使用Pspice仿真软件对该模型进行仿真,取得满意效果。最后通过实验验证。这种结构特别适用于通信设备、计算机、宇航等领域的电源。
关键词: 低压大电流DC-DC变换器 倍流整流 交错并联
《化学科学与工程前沿(英文)》 2023年 第17卷 第9期 页码 1208-1220 doi: 10.1007/s11705-023-2304-1
关键词: molecular synergy pseudocapacitive lignosulfonate flexible electronic devices asymmetric supercapacitor wide voltage windows
高电压快充钴酸锂正极——关键挑战、改性策略与未来展望 Review
王功瑞, 毕志宏, 张安萍, Pratteek Das, 林虎, 吴忠帅
《工程(英文)》 2024年 第37卷 第6期 页码 97-120 doi: 10.1016/j.eng.2023.08.021
为了促进高端便携式电子产品进一步发展,迫切需要发展具有高能量密度和高功率密度特性(简称“双高”)的锂离子电池(LIBs)。钴酸锂(LiCoO2)是目前商业化最为成功的正极材料,却仍然面临着工作电压较低和快充能力不足的挑战,远未达到双高储能目标的要求。在此,我们系统地总结和讨论了高电压和快充钴酸锂正极的研究现状,深入探讨了该领域的关键基础挑战、多种改性策略的最新研究进展和未来展望。本文首先全面详细地讨论了钴酸锂关键失效机制,包括体相结构退化、界面结构失稳、非均质反应过程和缓慢的界面反应动力学。随后,我们对已发展的改性策略和改性机制进行了归纳总结,分为通过元素掺杂(包括锂位点、钴位点、氧位点和多位点掺杂)提升锂离子扩散速率和体相结构稳定性,通过表面包覆(包括电介质、离子导体、电子导体材料及其组合)提升表界面结构稳定性和离子/电子导电性,纳米化,多策略组合,及其他策略(包括电解质、粘合剂、电极的曲折度、充电协议和预锂化方法的优化)。最后,我们对前瞻性观点和具有前景的研究方向进行了深入阐述,为设计和实现用于下一代双高锂离子电池的高电压快充钴酸锂正极提供了独到的建议和理论指导。
张小平,朱建林,唐华平,张炳根,柳莎莎
《中国工程科学》 2008年 第10卷 第4期 页码 78-83
对传统矩阵变换器存在电压传输比低的缺陷进行研究,提出一种新型的称为Cuk矩阵变换器的电路拓扑结构。介绍了该拓扑结构的基本构成及其工作原理,推导了其电压传输比与占空比之间函数关系的解析表达式,阐述了所采用的双闭环控制策略的基本设计方法,并通过仿真对其有效性和可行性进行了验证。结果表明:该拓扑结构能实现输出电压和频率的任意调节,其电压传输比可大于1,也可小于1,且直接输出标准的正弦波而无需滤波环节,有效地解决了传统矩阵变换器电压传输比低的难题,具有一定的应用价值。
Solid-state transformer-based new traction drive system and control
Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 411-426 doi: 10.1007/s11465-018-0467-0
A new type of traction drive system consisting of solid-state traction transformer (SSTT), inverter unit, auxiliary inverter, traction motor and other key components is built in order to suit the demand of developing the next-generation electric traction system which will be efficient and lightweight, with high power density. For the purpose of reducing system volume and weight and improving efficiency and grid-side power quality, an efficient SSTT optimized topology combining high-voltage cascaded rectifiers with high-power high-frequency LLC resonant converter is proposed. On this basis, an integrated control strategy built upon synchronous rotating reference frame is presented to achieve unified control over fundamental active, reactive and harmonic components. The carrier-interleaving phase shift modulation strategy is proposed to improve the harmonic performance of cascaded rectifiers. In view of the secondary pulsating existing in a single-phase system, the mathematical model of secondary power transfer is built, and the mechanism of pulsating voltage resulting in beat frequency of LLC resonant converter is revealed, so as to design optimum matching of system parameters. Simulation and experimental results have verified that the traction system and control scheme mentioned in this paper are reasonable and superior and that they meet the future application requirements for rail transit.
关键词: solid-state traction transformer high-voltage cascaded rectifier LLC resonant converter synchronous rotating reference frame carrier-interleaving phase shift control secondary pulsating voltage beat frequency
Data-driven consumer-phase identification in low-voltage distribution networks considering prosumers
《能源前沿(英文)》 doi: 10.1007/s11708-024-0946-4
关键词: consumer-phase identification data-driven low-voltage distribution network advanced metering infrastructure singular value decomposition
阎红
《中国工程科学》 2007年 第9卷 第11期 页码 172-174
探讨了在工矿企业中10kV高压电力电缆在线运行温度检测的必要性与实际应用;列举了感温元件 的选型方法以及温度监测系统的组成与运行;介绍了信息处理软件和故障诊断专家系统软件、电力设备底层 信息网、现场总线技术在电力系统中的应用;实现了不停电状态下对高压电缆及电缆接头等各种电缆的故障 在线监测及诊断功能。
关键词: 10kV高压电力电缆 终端头 温度传感器 监测系统
《能源前沿(英文)》 2022年 第16卷 第6期 页码 943-955 doi: 10.1007/s11708-021-0793-5
关键词: weak grids voltage source (VS) control wind turbine (WT) stabilization control wind farm inertial response
标题 作者 时间 类型 操作
Parameter identification of interconnected power system frequency after trip-out of high voltage transmission
Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
期刊论文
Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery
Tong Zhang, Elie Paillard
期刊论文
Experimental study of pollution effect on the behavior of high voltage insulators under alternative current
Hani BENGUESMIA, Nassima M’ZIOU, Ahmed BOUBAKEUR
期刊论文
A pseudocapacitive molecule-induced strategy to construct flexible high-performance asymmetric supercapacitors
期刊论文
Solid-state transformer-based new traction drive system and control
Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG
期刊论文
Data-driven consumer-phase identification in low-voltage distribution networks considering prosumers
期刊论文
Analysis and stabilization control of a voltage source controlled wind farm under weak grid conditions
期刊论文
特高压输电工程(英文)
2022年12月10日
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