Results 1 to 10 of about 20,549 (205)

Mechanical Fault Diagnosis of a High Voltage Circuit Breaker Based on High-Efficiency Time-Domain Feature Extraction with Entropy Features [PDF]

Entropy, 2020
The fault samples of high voltage circuit breakers are few, the vibration signals are complex, the existing research methods cannot extract the effective information in the features, and it is easy to overfit, slow training, and other problems.
Jiajin Qi, Xu Gao, Nantian Huang
doaj   +4 more sources

Investigation on the fault monitoring of high-voltage circuit breaker using improved deep learning. [PDF]

PLoS ONE, 2023
Mechanical faults are the main causes of abnormal opening, refusal operation, or malfunction of high-voltage circuit breakers. Accurately assessing the operational condition of high-voltage circuit breakers and delivering fault evaluations is essential ...
Hao Chen, Chenlei Han, Yucheng Zhang, Zhaoxing Ma, Haihua Zhang, Zhengxi Yuan   +5 more
doaj   +2 more sources

On the Stability of Perfluoroisobutyronitrile in High-Voltage Circuit Breaker: A Computational Study [PDF]

ACS Omega
2,3,3,3-Tetrafluoro-2-(trifluoromethyl) propanenitrile, also known as perfluoroisobutyronitrile (CF4-CN), is the main component of the so-called g3 gas mixture (C3F7CN-CO2-O2), a proven alternative to SF6 as an insulating gas in high-voltage circuit breakers.
Muhammad Bilal Arif, Michele Turelli, Maxime Lacuve, Christophe Coquelet, Carlo Adamo   +4 more
openaire   +3 more sources

Research on the Difference Mechanism of High Voltage Circuit Breaker’s Opening/Closing Coil Current [PDF]

E3S Web of Conferences, 2021
High voltage circuit breakers are important protection and control equipment for the power grid. The defects and faults of the circuit breaker seriously affect the safety and stability of the power system.
Su Yi, Lu Yufeng, Zhang Lei, Rao Xiajin
doaj   +1 more source

Restrike characteristics of vacuum circuit breaker in its opening process under DC voltage

IET Science, Measurement & Technology, 2023
The restrike of vacuum circuit breaker during the breaking process causes overvoltage and intensifies the insulation deterioration of high‐voltage equipment. To solve this problem, the vacuum breaker aging test method and the restrike characteristics are
Jixing Sun, Yongzhi Fan, Jiyong Liu, Jindong Huo, Sibo Song, Yujian Ding, Yu Tian, Huili Wang, Nana Wu   +8 more
doaj   +1 more source

Design of ± 535 kV hybrid high voltage direct current (HVDC) circuit breaker

IET Generation, Transmission & Distribution, 2022
This paper proposes a ± 535 kV hybrid high voltage direct current (HVDC) circuit breaker. In this paper, the interruption processes of the main branch, transferring branch, and MOV (metal oxide varistors) branch are studied by PSCAD/EMTDC computer ...
Chenyang Liu, Weizheng Yao, Chuan Xiang, Xufeng Cheng, Qinglong Wang   +4 more
doaj   +1 more source

Simulation of supersonic flow in high-voltage circuit breakers

IET Conference Proceedings, 2023
High-voltage circuit breakers (HVCB) are critical protection and control equipment in the electric transmission and distribution system. Analysis of the arc quenching process in the nozzle through modelling and simulation is a key stage in the development process of the HVCB.
Qiao, Yujiao, Matharage, Shanika; id_orcid 0000-0001-6039-8127, Wang, Zhongdong   +2 more
openaire   +2 more sources

Principal component analysis (PCA) based sparrow search algorithm (SSA) for optimal learning vector quantized (LVQ) neural network for mechanical fault diagnosis of high voltage circuit breakers

Energy Reports, 2023
An essential piece of equipment for the protection and management of the electricity grid is a high voltage(HV) circuit breaker. The reliability and stability of the electricity grid are directly affected by the condition of operation of a high voltage ...
Kuan Zhang, Zehua Chen, Liyuan Yang, Yongchun Liang   +3 more
doaj   +1 more source

Parameters design of voltage sharing components for the series multi‐break mechanical switch

IET Science, Measurement & Technology, 2022
Series multi‐break mechanical switch is one of the critical components of high‐voltage hybrid DC circuit breakers. However, due to the existence of distributed capacitance, the voltage distribution between the breaks is not balanced.
Daochun Huang, Huaqing Wang, Wanlin Quan, Xin Chen, Mingjing Shuang, Huipeng Li   +5 more
doaj   +1 more source

Performance Evaluation and Limitations of Overvoltage Suppression Circuits for Low- and Medium-Voltage DC Solid-State Breakers

IEEE Open Journal of Power Electronics, 2021
This paper presents a design and performance evaluation of three different overvoltage suppression circuits employed in a solid-state circuit breaker for medium- to high-power and low- to medium-voltage DC grids.
Andreas Giannakis, Dimosthenis Peftitsis
doaj   +1 more source