基于多物理场耦合的高压SF6断路器冷气流混沌特性研究

doi:10.11985/2018.07.003

摘要/Abstract

摘要：

研究灭弧室压力、速度和湍流等气流参数,对于进一步优化断路器本体结构设计具有重要意义。本文以550kV单断口高压断路器为研究对象,研究灭弧室气流参数的时空特性,建立三维计算模型,采用有限体积法对断路器开断容性小电流情况下的气流场进行数值求解,提取有效特征点,得到压力、密度、速度及湍流等参数;采用C-C算法、G-P算法、FFT变换和“修正”的混沌理论对开断过程中各气流参数进行系统复杂混沌运动行为分析。结果表明：断路器开断过程中,气流运动存在混沌特征,并通过横向、纵向比较压力和密度、马赫数和速度等参数,得到各参数混沌特性之间的联系与区别,为进一步通过改变喷口型面调整气流流路以实现气流的有效气吹,提高断路器开断能力,同类以及替代产品的改进和开发提供了理论依据。

关键词: 高压SF₆断路器, 气流场, 混沌, 喷口, 开断能力

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

中图分类号:

TM561.3

韩颖,冯厉鹏,曹云东,侯春光. 基于多物理场耦合的高压SF₆断路器冷气流混沌特性研究[J]. 电气工程学报, 2018, 13(7): 16-22.

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.

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基于多物理场耦合的高压SF₆断路器冷气流混沌特性研究

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

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