Finite element analysis of electromagnets and contact systems in low voltage current limiting circuit breakers

Abri, A.; Nordgren, R.; Kjellnas, S.; Banghammar, L.A.; Lindgren, S.

doi:10.1109/20.106478

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…The FEM is simple. And it has higher calculation precision [14], [15]. Therefore, in this paper, the FEM is used to model the electromagnetic system, simulating and analyzing effects of the condition changes of operating mechanism on the CC waveform.…”

Section: The Model Of Electromagnetic System Based On Femmentioning

confidence: 99%

Condition Assessment of High Voltage Circuit Breaker Operating Mechanism Based on Coil Current Waveform

Duan¹,

Hongcai²,

Min³

et al. 2016

Proceedings of the 2016 International Conference on Energy, Power and Electrical Engineering

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Abstract-In order to evaluate the condition of the high voltage circuit breaker (HVCB) operating mechanism, a method based on the coil current (CC) waveform of the operating mechanism has been studied in this paper. A finite element method (FEM) with high accuracy has been used to establish an electromagnetic system model of the operating mechanism. The effects of the mechanical parameter variations and mechanism faults on the CC waveform have been studied by simulation and experimental studies, and the features and inflections of the CC waveform are determined as the evaluation indices of the mechanism. Then the slope method has been used to extract features and inflections of the CC waveform after filtering, and the CC features are optimized by Pearson correlation coefficient method. Finally, the condition of the HVCB operating mechanism has been evaluated by the combination of the waveform recognition and neural network analysis. It has been concluded that the evaluation results can accurately reflect the operation condition of the HVCB operating mechanism.

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Section: The Model Of Electromagnetic System Based On Femmentioning

confidence: 99%

Condition Assessment of High Voltage Circuit Breaker Operating Mechanism Based on Coil Current Waveform

Duan¹,

Hongcai²,

Min³

et al. 2016

Proceedings of the 2016 International Conference on Energy, Power and Electrical Engineering

View full text Add to dashboard Cite

show abstract

“…Fast mechanical switches can be used to replace current-limiting fuses [8,10,11]. With the action time of several hundreds of microseconds, it is possible to break a 50Hz/60Hz AC current before it has reached the maximum value [12,16].…”

Section: Fast-breaking Mechanical Circuit Breakersmentioning

confidence: 99%