Results 31 to 40 of about 1,406,505 (216)

Testing of Selected Surge Protection Devices in the Context of the Possibility of Ensuring the Reliability of Power Grids

Energies, 2023
The paper aims to analyze the parameters of prototypes of new overvoltage protection devices for power grids—a multi-chamber insulator arrester (MCA) and a long flashover arrester (LFA). The article presents the research results on determining the actual
Michał Borecki, Maciej Ciuba
doaj   +1 more source

Research on overvoltage and minimum air clearance on 1000 kV AC side of converter transformer in ±1100 kV Guquan converter station

The Journal of Engineering, 2019
In the hierarchically connected ultra-high voltage (UHV) DC projects, the minimum air clearance on the 1000 kV AC side of converter transformer directly affects the layout and area of the valve hall.
Lou Ying, Li Zhenqiang, Xie Liang, Wan Lei   +3 more
doaj   +1 more source

Harmonic Overvoltage Analysis of Electric Railways in a Wide Frequency Range Based on Relative Frequency Relationships of the Vehicle–Grid Coupling System

Energies, 2020
Harmonic overvoltage in electric railway traction networks can pose a serious threat to the safe and stable operation of the traction power supply system (TPSS).
Qiujiang Liu, Binghan Sun, Qinyao Yang, Mingli Wu, Tingting He   +4 more
doaj   +1 more source

Online observer of the voltage components of the PEM electrolyzer based on the time-varying linearization of the semi-empirical model

Energy Reports, 2023
This paper presents a method to estimate the components of the PEM electrolyzer voltage with the dynamic input current. The total voltage can be divided into reversible voltage and irreversible voltage that the former always can be described as a ...
Kai Jing, Chang Liu
doaj   +1 more source

Modeling and Experimental Analysis of Overvoltage and Inrush Current Characteristics of the Electric Rail Traction Power Supply System

Energies, 2022
High-speed EMUs (electric multiple-units) frequently pass through the phase-separation zone during operation. Overvoltage generated during the operation of the vehicle-mounted circuit breaker has a long duration and high waveform steepness, which ...
Jixing Sun, Kaixuan Hu, Yongzhi Fan, Jiyong Liu, Shengchun Yan, Yan Zhang   +5 more
doaj   +1 more source

Estimation of New Weighted Controlled Switching Overvoltage by RBFN Model [PDF]

Journal of Operation and Automation in Power Engineering, 2020
Mitigating switching overvoltages (SOVs) and conducting well-suited insulation coordination for handling stresses are very important in UHV transmission Lines. The best strategy in the absence of arresters is controlled switching (CS). Although elaborate
M. Hasanpour, M. Ghanbari, V. Parvin-Darabad   +2 more
doaj   +1 more source

Printed Flexible WO3‐Based Supercapacitors for Powering Low‐Powered Electronics in Wearable Devices and Energy Autonomous Temperature Monitoring

Advanced Electronic Materials, EarlyView.
This study represents one of the systematic demonstrations of a screen‐printed, flexible WO3‐based supercapacitor, exhibiting excellent charge‐storage performance for powering wearable electronics. The device shows a specific capacitance of 3.44 F g−1 and an energy density of 0.302 Wh kg−1 at 0.05 mA, which enable to operate multiple wearable ...
Jithin Kanathedath, Adarsh Sivan Pillai, Febin Paul, Prasutha Rani Markapudi, Nazmi Sellami, Firdaus Muhammad‐Sukki, Libu Manjakkal   +6 more
wiley   +1 more source

THE RESONANT OVERVOLTAGE IN NON-SINUSOIDAL MODE OF MAIN ELECTRIC NETWORK

Electrical engineering & Electromechanics, 2018
Purpose. The resonant overvoltage arises in main electrical networks as a result of random coincidence of some parameters of circuit and its mode and it may exist for a relatively long time.
V. G. Kuznetsov, Yu. I. Tugay, V. V. Kuchanskiy, Yu. G. Lyhovyd, V. A. Melnichuk   +4 more
doaj   +1 more source

Design Principles of Electrocatalysts for Industrial‐Scale Water Electrolysis

Advanced Energy Materials, EarlyView.
This Review distills electrocatalyst design for industrial‐scale water electrolysis into integrated principles linking active‐site engineering, phase and lattice modulation, interfacial microenvironment regulation and mass‐transport control. By connecting catalyst families with HER/OER mechanisms and practical operating demands, it outlines pathways ...
Hong Tang, Cui Ce, John Wang
wiley   +1 more source

Motor Overvoltage Mitigation Using SiC-Based Zero-Voltage Switching Inverter

IEEE transactions on power electronics
The motor overvoltage phenomenon is an issue that may arise from the high voltage slew rates ($\mathrm{d}v/\mathrm{d}t$) of silicon carbide mosfets in cable-fed drives.
Suleman Yunus, Wenlong Ming, C. E. Ugalde-Loo   +2 more
semanticscholar   +1 more source