Results 41 to 50 of about 339 (170)

Application of thyristor controlled phase shifting transformer excitation impedance switching control to suppress short-circuit fault current level

Journal of Modern Power Systems and Clean Energy, 2018
Short-circuit fault current suppression is a very important issue in modern large-interconnected power networks. Conventional short-circuit current limiters, such as superconducting fault current limiters, have to increase additional equipment ...
Jun LIU, Xudong HAO, Xu WANG, Yefu CHEN, Wanliang FANG, Shuanbao NIU   +5 more
doaj   +1 more source

Arc Resistance Enhancement of Converter Transformer Tank Through Structural Improvements: Simulation and Experimental Validation

High Voltage, EarlyView.
ABSTRACT Currently, limited research exists on the structural response and protection methods of the converter transformer tank for ± 800 kV ultra‐high voltage direct current transmission project to high energy arc faults. This research investigates the dynamic response and the vulnerable areas of the ultra‐high voltage converter transformer under the ...
Ke Wang, Shuqi Zhang, Yikun Zhao, Yichen Wang, Zongliang Zhang, Jinhua Zhang   +5 more
wiley   +1 more source

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +1 more source

Mechanism of Quasi‐Power‐Frequency Resonant Overvoltage Triggered by Multiple Lightning Strikes in High‐Voltage Alternating Current Systems Equipped With Shunt Reactor

High Voltage, EarlyView.
ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang, Tao Cui, Zhengxi Wang, Tongwei Guo, Xiaohui Wu, Hong Zeng, Jie Guo, Yanzhao Xie   +7 more
wiley   +1 more source

Analyses on an electronic voltage transformer's failure by its resonance with very fast transient overvoltage and suppression

High Voltage
As voltage measuring devices are widely used in the high voltage power system with a primary‐secondary‐fusion structure, electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic ...
Houda Zhu, Qing Chen, Hongbin Li, Yue Tong, Linshan Han, Yang Jiao   +5 more
doaj   +1 more source

Simulation and analysis of a gas insulated switchgear explosion accident caused by a failure of high-voltage circuit breaker in a thermal power plant

The Journal of Engineering, 2019
This study analyses a gas insulated switchgear explosion accident caused by a failure of the circuit breaker (CB) in a thermal power plant, which resulted in the explosion of the CB and the burning of the potential transformer (PT).
Xun Zhang, Kai Dai, Wei Niu, Rongbin Xie, Huarong Zeng, Yi Wen, Xiaohong Ma   +6 more
doaj   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

High Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang, Xiangyu Zhang, Sihang Wu, Lei Qi, Xiang Cui   +4 more
wiley   +1 more source

Sulfur–Fluoride Exchangeable Moiety‐Integrated Mediator of Benzenesulfonyl Fluoride Additives in Low‐Electrolyte Lithium–Sulfur Batteries

ChemSusChem, Volume 19, Issue 14, 29 July 2026.
Benzenesulfonyl fluoride (BF) regulates the transformation of lithium polysulfides (LiPSs) through its sulfur–fluoride exchangeable moiety. Leveraging its chemoselectivity, BF promotes the selective reduction of LiPSs (Li2S8 → Li2S4) while suppressing undesired side reactions, a behavior not observed in the absence of the additive.
Hyejun Kim, Young‐uk Kim, Daon Lee, Jae Yoon Sung, Seh‐Yoon Lim, Hun‐Gi Jung, Jung Ho Kim, Je‐Nam Lee, Sang‐Gil Woo, Junyoung Mun   +9 more
wiley   +1 more source

Coral‐Reef‐Like Nanoporous Nickel Architecture for Enhanced Oxygen/Hydrogen Evolution Reaction and Alkaline Water Electrolysis

Advanced Sustainable Systems, Volume 10, Issue 7, July 2026.
The coral‐reef‐like nanoporous architecture of Ni, designed through NiCu dealloying, promotes HER and OER by increasing active site density, facilitating charge transfer kinetics, and expanding the electrochemically active surface area, resulting in improved alkaline water electrolysis efficiency.
Mohmmad Khalid, Simon Barnabé, Samaneh Shahgaldi   +2 more
wiley   +1 more source

Simulation and Test Study on Very Fast Transient Overvoltage in 1000kV GIS Substation [PDF]

IOP Conference Series: Materials Science and Engineering, 2017
Disconnector switching in gas insulated switchgear (GIS) generates very fast transient overvoltage (VFTO). VFTO may damage the insulation of GIS equipment. This paper studies the VFTO of a 1000kV GIS substation. The simulation models are obtained according to the configuration of GIS. Operation modes of disconnector were summarized. The characteristics
Bin Han, Jiming Lin, Liangeng Ban, Hao Wang, Zhibing Li, Zutao Xiang   +5 more
openaire   +1 more source