Results 101 to 110 of about 1,219,601 (281)

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

Study on the Coupled Effects of High‐Speed Airflow and Charged Sand on Power‐Frequency Discharge Characteristics of Conductor–Tower Gaps in Strong Wind–Sand Environments

High Voltage, EarlyView.
ABSTRACT Strong wind–sand weather in Xinjiang threatens power grid safety by increasing transmission line tripping risks. Existing studies focus on sand polarization but neglect the coupled influence of high‐speed airflow and charged sand on gap discharge characteristics.
Jianghai Geng, Yang Wang, Ping Wang, Yang Lu, Songsong Zhou, Yujian Ding, Xiaojun Zhang, Wenbing Zhuang, Yu Su   +8 more
wiley   +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

Characteristics of Two Ground Grid Potentials After a Triggered Lightning Stroke

IEEE Access, 2020
It has been determined that the discharge of lightning current to ground through grounding grid results in high potential at the grounding grid and other nearby grounding grids, which is very destructive.
Xu Yan, Yijun Zhang, Shaodong Chen, Sai Du, W. Lyu, Lyuwen Chen   +5 more
semanticscholar   +1 more source

Application Status and Development Trends of DC Ice‐Melting Devices in China's Power Grid

IET Smart Energy Systems, EarlyView.
This paper summarises the development history and engineering application status of DC ice‐melting devices (DCIMD) in China, analyses the principles, advantages, disadvantages and adaptability of mainstream topologies and discusses the key problems and corresponding improvement directions.
Ming Lei, Tianlong Zhang, Zhenglin Li, Jian Wang, Tao Zhang, Peng Wang, Ruiqi Zhan   +6 more
wiley   +1 more source

Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash [PDF]

, 2018
<p>The data supports the paper entitled “<a href="https://doi.org/10.1029/2018JD029488">Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash</a>”
Qie, Xiushu, Pu, Yunjiao, Jiang, Rubin (5623211), Jiang, Rubin, Qie, Xiushu (5623208), Sun, Zhuling (5623214), Sun, Zhuling, Liu, Mingyuan, Pu, Yunjiao (5623205), Liu, Mingyuan (5623217), Zhang, Hongbo (5623220), Zhang, Hongbo   +11 more
core   +1 more source

Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage

Geophysical Research Letters, 2017
By conducting comprehensive observation on the rarely triggered positive lightning flashes, two cases of upward negative leaders were quantitatively investigated with simultaneous data of current, optical, and electromagnetic field changes at fine time ...
Yunjiao Pu, Rubin Jiang, Xiushu Qie, Mingyuan Liu, Hongbo Zhang, Yanfeng Fan, Xueke Wu   +6 more
doaj   +1 more source

No added cost: Emotion recognition in co‐occurring ADHD and ASD

British Journal of Clinical Psychology, EarlyView.
Abstract Objectives Facial emotion recognition (FER) is fundamental for social interaction, yet this ability is often impaired in attention‐deficit/hyperactivity disorder (ADHD) or autism spectrum disorder (ASD). While research has documented these difficulties, two key questions remain: Are these deficits specific to recognising emotions or do they ...
Irene Sophia Plank, Kaltrina Krasniqi, Alexandra Pior, Julia Nowak, Christine M. Falter‐Wagner   +4 more
wiley   +1 more source

Punchline with(out) purpose: Integrating research on instructional humour and seductive details

British Journal of Educational Psychology, EarlyView.
Abstract Introduction We integrated research on instructional humour and seductive details to investigate when affiliative course‐related humour is effective or rather ineffective for learning. We assumed that instructional humour without a cognitive function (irrelevant humour) would have detrimental effects on learning performance resembling the ...
Lisa Bender, Alexander Renkl, Tino Endres   +2 more
wiley   +1 more source

Behind Closed Doors: How Boardroom Silence and Implicit Theories Shape Corporate Governance

Corporate Governance: An International Review, EarlyView.
ABSTRACT Research Question/Issue Why do directors, despite formal authority and oversight responsibilities, remain silent in the boardroom, and how does such silence shape governance outcomes? Research Findings/Insights Silence in boards is not a passive absence but a routinized governance practice.
Marilieke Engbers
wiley   +1 more source