Results 91 to 100 of about 2,509 (300)

Research on Fault Diagnosis of High-Voltage Circuit Breakers Using Gramian-Angular-Field-Based Dual-Channel Convolutional Neural Network

Energies
The challenge of accurately diagnosing mechanical failures in high-voltage circuit breakers is exacerbated by the non-stationary characteristics of vibration signals.
Mingkun Yang, Liangliang Wei, Pengfeng Qiu, Guangfu Hu, Xingfu Liu, Xiaohui He, Zhaoyu Peng, Fangrong Zhou, Yun Zhang, Xiangyu Tan, Xuetong Zhao   +10 more
doaj   +1 more source

Experiment and CFD simulation of exhaust tube in highvoltage circuit breaker

MATEC Web of Conferences, 2018
In a high-voltage circuit breaker, the exhaust tube connects the arc zone with the exhaust volume. During the arc interruption process, the exhaust tube transports the hot gas from the arc interruption zone to the exhaust volume through its distributed ...
Ye Xiangyang, Pisu Francesco, Grob Stephan, Dhotre Mahesh, Mantilla Javier   +4 more
doaj   +1 more source

DC Circuit Breaker with an Alternating Commutating Circuit [PDF]

, 2023
The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and
Mehraeen, Shahab, Sen, Sudipta
core   +1 more source

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source

A Hybrid DC Circuit Breaker with Fault-Current-Limiting Capability for VSC-HVDC Transmission System

Energies, 2019
The direct current circuit breakers are considered a promising option to protect the transmission line against commonly appearing line-to-ground fault.
Muhammad Ahmad, Zhixin Wang
doaj   +1 more source

A condition assessment algorithm based on dynamic time warping for high-voltage circuit breaker [PDF]

, 2016
The paper presents an innovative algorithm for the analysis of the residual life of an high voltage circuit breaker. This algorithm relies on the measurements of the accelerometer and on the Dynamic Time Warping algorithm (DTW).
Michele Ermidoro, PREVIDI, Fabio, Fabio Previdi, ERMIDORO, Michele   +3 more
core   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Appropriate Protection Scheme for DC Grid Based on the Half Bridge Modular Multilevel Converter System

Energies, 2019
The half bridge (HB) modular multilevel converter (MMC) technology is considered a breakthrough to mitigate the shortcomings of the conventional voltage source converter (VSC) in high-voltage direct-current (HVDC) grid application.
Ho-Yun Lee, Mansoor Asif, Kyu-Hoon Park, Hyun-Min Mun, Bang-Wook Lee   +4 more
doaj   +1 more source

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts [PDF]

To address the issue of over-standard short-circuit currents in a power system, it is imperative to enhance the comprehensive performance of the electrical contacts, which serve as the lynchpin of circuit breakers, so as to improve the breaking capacity ...
Dongchen Jia, Yuwei Fu, Yi Ding, Tan Liu, Zhongxiao Song, Yu Han, Zhen Pang   +6 more
core   +1 more source

Evaluation of high-voltage circuit breaker performance with a validated arc model [PDF]

, 2000
A digital current-zero measuring system was used to monitor about 200 zero crossings of short-line fault currents in three designs of commercial high-voltage circuit breakers.
Kertesz, V., Smeets, R.P.P., Smeets, RPP René, Kertész, V   +3 more
core   +1 more source