Results 41 to 50 of about 78,707 (283)

Research on Resonance Overvoltage of EHV Transmission Lines Caused by Lightning Strike

IEEE Access, 2021
This paper studies the mechanism and influencing factors of resonance overvoltage of EHV transmission lines caused by lightning. By analyzing the time domain steady state of the simplified resonance circuit, the physical mechanism of resonance is ...
Xiao Lei, Tao Cui, Xiaohui Wu, Hong Zeng, Qiang Liu, Linhuan Li   +5 more
doaj   +1 more source

Economic Viability of Photovoltaic Systems Providing Frequency Containment Reserve

Advanced Energy and Sustainability Research, EarlyView.
This article investigates the feasibility of photovoltaic (PV) systems providing frequency containment reserve (FCR) in the Netherlands. The economic analysis demonstrates that a PV plant can profitably participate in FCR without battery storage by maintaining an active power reserve.
Emil Petkovski, Mari S. Bogen, Theo Bosma, Marcel Eijgelaar   +3 more
wiley   +1 more source

Lightning Protection Methods for Wind Turbine Blades: An Alternative Approach

Applied Sciences, 2020
Lightning strikes happens in a fraction of time, where they can transfer huge amounts of charge and high currents in a single strike. The chances for a structure to be struck by lightning increases as the height increases; thus, tall structures are more ...
Viktor Mucsi, Ahmad Syahrir Ayub, Firdaus Muhammad-Sukki, Muhammad Zulkipli, Mohd Nabil Muhtazaruddin, Ahmad Shakir Mohd Saudi, Jorge Alfredo Ardila-Rey   +6 more
doaj   +1 more source

Frequency‐Domain Subspace Identification for Noninvasive Transformer Winding Parameter Estimation and Fault Diagnostics

International Journal of Circuit Theory and Applications, EarlyView.
Noninvasive frequency‐domain method estimates transformer winding parameters from terminal measurements, eliminating the need for design data. ABSTRACT A novel frequency‐domain subspace identification method enables precise estimation of transformer winding ladder network parameters directly from terminal measurements.
K. Lakshmi Prasanna, Manoj Samal, Mithun Mondal, Palash Mishra   +3 more
wiley   +1 more source

Research on Line Patrol Strategy of 110kV Transmission Line after Lightning Strike

MATEC Web of Conferences, 2016
Lightning faults occupy in the majority of instantaneous fault and reclosing can usually be successful, so power supply can be restored without immediate patrol in many cases. Firstly, this paper introduces the lightning fault positioning and identifying
Li Mingjun, Song Kunyu, Ou Yuqiang, Gan Tuanjie, Fan Yazhou, Chen Jianping   +5 more
doaj   +1 more source

The missing woodland story: Implications of 1700 years of stand‐scale change on ‘naturalness’ and managing remnant broadleaved woodlands

People and Nature, EarlyView.
Abstract Longer‐term perspectives—equivalent to the lifespans of long‐lived trees—are required to fully inform perceptions of ‘naturalness’ used in woodland conservation and management. Stand‐scale dynamics of an old growth temperate woodland are reconstructed using palaeoecological data.
Annabel Everard, J. Edward Schofield, Tim Mighall, Scott Timpany, Gill Plunkett   +4 more
wiley   +1 more source

Correlative Chemical Imaging to Reveal the Nature of Different Commercial Graphene Materials

Small Methods, EarlyView.
Commercial graphene‐based materials from different sources and of varying complexities were investigated correlatively using commonly employed imaging techniques, including SEM, AFM, ToF‐SIMS, AES, and EDS. ToF‐SIMS combined with SEM was identified as the most effective combination for simultaneously resolving the complex morphology and chemical ...
Robert Schusterbauer, Paul Mrkwitschka, Mario Sahre, Elena Corrao, Amaia Zurutuza, Alexander Doolin, Francesco Pellegrino, Jörg Radnik, Ievgen S. Donskyi, Vasile‐Dan Hodoroaba   +9 more
wiley   +1 more source

Correlated Transient Response of Buried Cables and Lightning Channel Radiation of Return Strokes of Five Rocket‐Triggered Lightning Strikes

High Voltage, EarlyView.
ABSTRACT Data from five rocket‐triggered lightning flashes are adopted to analyse the correlated transient response of buried cables and lightning channel radiations. These five flashes have the same termination point that is right above the buried cables and involve a total of 32 return strokes.
Mi Zhou, Xiaoyu Lei, Li Cai, Jianguo Wang, Weihan Zhao, Jinxin Cao, Denglei Duan, Maorong Geng, Yadong Fan, Jianping Wang   +9 more
wiley   +1 more source

Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges

High Voltage, EarlyView.
ABSTRACT Modern high‐voltage electrical equipment operates in complex environments where surface conditions are subjected to multifaceted influences from electric fields, thermal gradients, contaminants, irradiation and other extreme environmental factors.
Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +6 more
wiley   +1 more source

The Issue of Pre‐Islamic Arabic Christian Poetry Revisited

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Is only very little Arabic Christian poetry extant from pre‐Islamic times? While distancing myself from Louis Cheikho's (1859–1927) view that almost all pre‐Islamic poets were Christians, I contend in this article that some of them indeed were.
Ilkka Lindstedt
wiley   +1 more source