Investigation of Chaotic Characteristics for Cold Gas Flow in High Voltage SF6 Circuit Breaker Based on Multi-Physical Field Coupling

doi:10.11985/2018.07.003

Abstract

Abstract:

Studying the parameters of pressure, velocity and turbulence in arc quenching chamber is of significance for the optimization design of SF₆ circuit breaker. In this paper, 550 kV single break high-voltage SF₆ circuit breaker is taken as the research object and a three-dimensional calculation model was established. Then we simulated the gas flow field of circuit breaker under small capacitive current interruption based on the finite volume method and extracted the valid feature points. Then we obtained the pressure, density, velocity, and temperature of gas flow. Moreover, we analyzed complex chaos motion behavior which was caused by various parameters using C-C algorithm, G-P algorithm,Fourier transform and the modified chaos theory. The results show that there are chaotic characteristics of gas flow during the circuit breaker breaking. And through horizontal and vertical comparison, we got the relation and difference between chaotic characteristic parameters. Besides, it provides a theoretical basis for improvement of similar and alternative products in the future by changing the nozzle and gas flow path to realize the effective gas blowing, improving the breaking capacity of the circuit breaker.

Key words: High voltage SF₆ circuit breaker, flow field, chaos, nozzle, breaking capacity

CLC Number:

TM561.3

Han Ying,Feng Lipeng,Cao Yundong,Hou Chunguang. Investigation of Chaotic Characteristics for Cold Gas Flow in High Voltage SF₆ Circuit Breaker Based on Multi-Physical Field Coupling[J]. Journal of Electrical Engineering, 2018, 13(7): 16-22.

Figures/Tables 7

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Investigation of Chaotic Characteristics for Cold Gas Flow in High Voltage SF₆ Circuit Breaker Based on Multi-Physical Field Coupling

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