摘要
该文以252kVSF6高压断路器作为研究对象,在全面考虑了影响液压操动机构运动特性的各种因素后,从能量守恒规律出发建立了液压操动机构的动力学数学模型,仿真并研究了液压操动机构的输出压力与速度特性,并以此作为计算灭弧室非定常、可压缩吹弧气体流动的边界条件,对开断过程中灭弧室内的气体流动规律进行了计算机仿真。分析了吹弧气体的运动规律,研究了改变液压操动系统的输出流量对灭弧气体流动特性及对断路器开断特性的影响,从而从机构动力学的角度出发,给出一种能够调节断路器开断特性的方法。
The 252kV SF6 circuit breaker is taken as the investigation subject. Under full considering various factors that influence on moving properties of hydraulic actuator, the kinetic mathematical models have been established based on the energy conservation law. The properties of output pressure and velocity have been simulated and analyzed, which are regarded as the boundary conditions for calculating unsteady and compressible gas flow, and the flow law of gas blast in the arc quenching chamber during breaking process has been simulated and analyzed. The influences on gas flow and breaking properties caused by flow rate of hydraulic output system have been investigated. So that, a method for adjusting the breaking property of SF6 circuit breaker is given from mechanistic kinetic point of view.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第20期118-123,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50477050)~~
关键词
SF6高压断路器
液压操动机构
数值计算
开断特性
SF6 High voltage circuit breaker
Hydraulic actuator
Numerical analysis
Interruption performance
