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Development and advances in modular multilevel converter based HVDC projects in China
《工程管理前沿(英文)》 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
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
Shagufta KHAN,Suman BHOWMICK
《能源前沿(英文)》 2015年 第9卷 第4期 页码 399-412 doi: 10.1007/s11708-015-0374-6
关键词: AC-DC power-flow Newton-Raphson method high voltage direct current (HVDC) control strategy
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
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
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)
Influence of direct electric current on wetting behavior during brazing
Kirsten BOBZIN, Wolfgang WIETHEGER, Julian HEBING, Lidong ZHAO, Alexander SCHMIDT, Riza ISKANDAR, Joachim MAYER
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 496-503 doi: 10.1007/s11465-019-0582-6
关键词: brazing electric current assisted wetting Lorentz force
Heng NIAN,Yi-peng SONG
《信息与电子工程前沿(英文)》 2015年 第16卷 第4期 页码 321-334 doi: 10.1631/FITEE.1400170
关键词: Direct power control Doubly fed induction generator Unbalanced and distorted grid voltage Vector proportional and integral resonant regulator Parameter deviation
null
《医学前沿(英文)》 2016年 第10卷 第3期 页码 286-296 doi: 10.1007/s11684-016-0456-9
Exogenic electric fields can effectively accelerate bone healing and remodeling through the enhanced migration of bone marrow mesenchymal stem cells (BMSCs) toward the injured area. This study aimed to determine the following: (1) the direction of rat BMSC (rBMSC) migration upon exposure to a direct current electric field (DCEF), (2) the optimal DCEF intensity and duration, and (3) the possible regulatory role of SDF-1/CXCR4 axis in rBMSC migration as induced by DCEF. Results showed that rBMSCs migrated to the positive electrode of the DCEF, and that the DCEF of 200 mV/mm for 4 h was found to be optimal in enhancing rBMSC migration. This DCEF strength and duration also upregulated the expression of osteoblastic genes, including ALP and OCN, and upregulated the expression of ALP and Runx2 proteins. Moreover, when CXCR4 was inhibited, rBMSC migration due to DCEF was partially blocked. These findings indicated that DCEF can effectively induce rBMSC migration. A DCEF of 200 mV/mm for 4 h was recommended because of its ability to promote rBMSC migration, proliferation, and osteogenic differentiation. The SDF-1/CXCR4 signaling pathway may play an important role in regulating the DCEF-induced migration of rBMSCs.
关键词: DCEF migration osteogenesis differentiation rBMSCs SDF-1/CXCR-4
Design and analysis of a new high frequency double-servo direct drive rotary valve
Muzhi ZHU,Shengdun ZHAO,Jingxiang LI
《机械工程前沿(英文)》 2016年 第11卷 第4期 页码 344-350 doi: 10.1007/s11465-016-0406-x
Researchers have investigated direct drive valve for many years to solve problems, such as fluid force imbalance and switching frequency. The structure of the rotary valve has received considerable research interest because of its favorable dynamic properties and simple structure. This paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novel structure and drive method satisfying high reversing frequency and adequate quantity of flow. Servo motors are integrated into the valve by the innovative structure, which is designed to equilibrate the unbalanced radial fluid force with the symmetric distributed oil ports. Aside from the fast reversing function of the valve, the DDRV presented high performance in linearity of the flow quantity and valve opening as a result of the fan-shaped flow ports. In addition, a computational fluid dynamics (CFD) method based on Fluent was conducted to verify the flux regulation effect of the height change of the adjustable boss.
关键词: direct drive rotary valve computational fluid dynamics (CFD) flow regulation
Salim CHENNAI,M-T BENCHOUIA
《能源前沿(英文)》 2014年 第8卷 第2期 页码 221-239 doi: 10.1007/s11708-014-0317-7
关键词: three-level neutral point clamped (NPC) inverter unified power quality conditioner (UPQC) current harmonics mitigation fuzzy logic controller voltage disturbance compensation shunt active filter series active filter power quality energy improvement
Metal-based direct hydrogen generation as unconventional high density energy
Shuo XU, Jing LIU
《能源前沿(英文)》 2019年 第13卷 第1期 页码 27-53 doi: 10.1007/s11708-018-0603-x
关键词: metal hydrogen generation hydrolysis metal water reaction clean energy
Series transformer based diode-bridge-type solid state fault current limiter
Amir HEIDARY,Hamid RADMANESH,Seyed Hamid FATHI,G. B. GHAREHPETIAN
《信息与电子工程前沿(英文)》 2015年 第16卷 第9期 页码 769-784 doi: 10.1631/FITEE.1400428
关键词: Solid state fault current limiter (SSFCL) Power quality Voltage sag Point of common coupling (PCC) Isolation transformer
Development of a simplified n-heptane/methane model for high-pressure direct-injection natural
Jingrui LI, Haifeng LIU, Xinlei LIU, Ying YE, Hu WANG, Xinyan WANG, Hua ZHAO, Mingfa YAO
《能源前沿(英文)》 2021年 第15卷 第2期 页码 405-420 doi: 10.1007/s11708-021-0718-3
关键词: high-pressure direct-injection natural gas chemical kinetics combustion modelling marine engine
标题 作者 时间 类型 操作
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
Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence
Shagufta KHAN,Suman BHOWMICK
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
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
Influence of direct electric current on wetting behavior during brazing
Kirsten BOBZIN, Wolfgang WIETHEGER, Julian HEBING, Lidong ZHAO, Alexander SCHMIDT, Riza ISKANDAR, Joachim MAYER
期刊论文
Multiple target implementation for a doubly fed induction generator based on direct power control underunbalanced and distorted grid voltage
Heng NIAN,Yi-peng SONG
期刊论文
Influence of the intensity and loading time of direct current electric field on the directional migration
null
期刊论文
Design and analysis of a new high frequency double-servo direct drive rotary valve
Muzhi ZHU,Shengdun ZHAO,Jingxiang LI
期刊论文
power quality conditioner based on a three-level NPC inverter using fuzzy control techniques for all voltage
Salim CHENNAI,M-T BENCHOUIA
期刊论文
Series transformer based diode-bridge-type solid state fault current limiter
Amir HEIDARY,Hamid RADMANESH,Seyed Hamid FATHI,G. B. GHAREHPETIAN
期刊论文