Results 21 to 30 of about 2,985,195 (250)

Exceptional atmospheric corrosion inhibition performance of super-hydrophobic films based on the self-propelled jumping behavior of water droplets

Corrosion Communications, 2021
Super-hydrophobic surfaces have attracted much attention for their potential applications based on the lotus effect, especially in corrosion protection. However, the lotus effect has limited application given its high dependence on external forces, such ...
Peng Wang, Xiaotong Chen, Tianping Li, Haoyuan Cai, Dun Zhang   +4 more
doaj   +1 more source

The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

Energies, 2016
Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring
Shimin Xue, Jingyue Yang, Yanxia Chen, Cunping Wang, Zhe Shi, Miao Cui, Botong Li   +6 more
doaj   +1 more source

A Novel Pilot Protection Principle Based on Modulus Traveling-Wave Currents for Voltage-Sourced Converter Based High Voltage Direct Current (VSC-HVDC) Transmission Lines

Energies, 2018
Protection for transmission lines is one of crucial problems that urgently to be solved in constructing the future high-voltage and large-capacity voltage-sourced converter based high voltage direct current (VSC-HVDC) systems.
Xiangyu Pei, Guangfu Tang, Shengmei Zhang   +2 more
doaj   +1 more source

Pilot Protection for Transmission Line of Grid-Forming Photovoltaic Systems Based on Jensen–Shannon Distance

Applied Sciences
When faults occur in transmission lines of grid-forming PV systems, the LVRT control and virtual impedance function cause the fault characteristics of grid-forming inverters to differ significantly from those of synchronous generators, which deteriorates
Kuan Li, Qiang Huang, Rongqi Fan
doaj   +1 more source

Effective time of a diffusion source in a pack cementation process on the AZ91D magnesium alloy

Journal of Materials Research and Technology, 2023
The powder thermal diffusion alloying method is an important method to fabricate intermetallic coatings on magnesium alloy substrates. The diffusion source, the diffusion time and the diffusion temperature are key parameters for a diffusion alloying ...
Dongzhu Lu, Quantong Jiang, Xiumin Ma, Liang Fan, Yanliang Huang, Baorong Hou   +5 more
doaj   +1 more source

Biweight Midcorrelation Based Transmission Line Pilot Protection Algorithm

IEEE Open Access Journal of Power and Energy
This paper presents a novel pilot protection algorithm for alternating current (ac) transmission lines that relies on biweight midcorrelation (BWMC) coefficients between the terminals’ currents.
Rodrigo Rozenblit Tiferes, Giovanni Manassero, Eduardo Lorenzetti Pellini, Silvio Giuseppe di Santo   +3 more
doaj   +1 more source

Development of facile image processing techniques regarding crevice corrosion of U75V high-speed rail steel

Journal of Materials Research and Technology, 2023
In-situ crevice corrosion images of U75V high-speed rail steel samples before and after heat treatment for microstructure refinement were obtained by a self-developed monitoring device, and facile image processing techniques have been developed.
Jian Wang, Zhongbo Peng, Binbin Zhang, Yu Deng, Jie Zhang, Weichen Xu   +5 more
doaj   +1 more source

Crevice corrosion of U75V high-speed rail steel with varying crevice gap size by in-situ monitoring

Journal of Materials Research and Technology, 2022
Crevice corrosion of high-speed rail steel U75V was studied with varying gap size by using self-designed device. Increasing gap size inhibited exterior cathodic reduction reaction of oxygen, inducing decrease of potential difference between interior and ...
Weichen Xu, Yu Deng, Binbin Zhang, Jie Zhang, Zhongbo Peng, Baorong Hou, Jizhou Duan   +6 more
doaj   +1 more source

Developing high photocatalytic antibacterial Zn electrodeposited coatings through Schottky junction with Fe3+-doped alkalized g-C3N4 photocatalysts

Nano Materials Science, 2023
Pure Zn coatings easily lose their protective performance after biofouling because they have no antibacterial effect under visible light. In this study, we fabricate a new antibacterial Zn composite coating using electrodeposition to couple Fe3+-doped ...
Ying Gao, Xiaofan Zhai, Yuxin Zhang, Fang Guan, Nazhen Liu, Xiutong Wang, Jie Zhang, Baorong Hou, Jizhou Duan   +8 more
doaj   +1 more source

A Pilot Directional Protection for HVDC Transmission Line Based on Relative Entropy of Wavelet Energy

Entropy, 2015
On the basis of analyzing high-voltage direct current (HVDC) transmission system and its fault superimposed circuit, the direction of the fault components of the voltage and the current measured at one end of transmission line is certified to be ...
Sheng Lin, Shan Gao, Zhengyou He, Yujia Deng   +3 more
doaj   +1 more source