Results 1 to 10 of about 154,492 (354)
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 ...
Chen H +5 more
europepmc +3 more sources
Mechanical Fault Diagnosis of a High Voltage Circuit Breaker Based on High-Efficiency Time-Domain Feature Extraction with Entropy Features. [PDF]
Entropy (Basel), 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.
Qi J, Gao X, Huang N.
europepmc +3 more sources
Application of Multiscale Entropy in Mechanical Fault Diagnosis of High Voltage Circuit Breaker. [PDF]
Entropy (Basel), 2018 Mechanical fault diagnosis of a circuit breaker can help improve the reliability of power systems. Therefore, a new method based on multiscale entropy (MSE) and the support vector machine (SVM) is proposed to diagnose the fault in high voltage circuit ...
Dou L, Wan S, Zhan C.
europepmc +2 more sources
International Journal of Metrology and Quality Engineering, 2019 The development of power grid system not only increases voltage and capacity, but also increases power risk. This paper briefly introduces the feature extraction method of the vibration signal of high voltage circuit breaker and support vector machine ...
Li Long +4 more
doaj +2 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
Research on fault identification of high-voltage circuit breakers with characteristics of voiceprint information. [PDF]
Sci RepHigh voltage circuit breakers are one of the core equipment in power system operation, and the voiceprint signals generated during operation contain extremely rich information.
Wang S, Zhou Y, Ma Z.
europepmc +2 more sources
Complex & Intelligent Systems, 2023 Reliable mechanical fault diagnosis of high-voltage circuit breakers is important to ensure the safety of electric power systems. Recent fault diagnosis approaches are mostly based on a single classifier whose performance relies heavily on expert prior ...
Xiaofeng Li +4 more
semanticscholar +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 +8 more
doaj +1 more source
Journal of Physics: Conference Series, 2023 Aiming at the problem that the detection of a single signal is difficult to accurately and comprehensively reflect the mechanical failure of the circuit breaker operating mechanism, the VS1 (VBM7) -12 high-voltage circuit breaker is selected as the ...
Junpeng Dang +5 more
semanticscholar +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 +4 more
doaj +1 more source