自能双动式SF_6断路器无载分闸气流场的仿真
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摘要
以252 k V自能双动式SF_6断路器的灭弧室为研究对象,对自能双动式SF_6断路器的灭弧室无载分闸气流场进行仿真分析。采用二维Navier-Stokes(N-S)方程,并与气流场控制方程联合,运用动网格技术,对计算区域进行划分。根据断路器的行程曲线,通过自编程序控制网格的动态变化,实现断路器分闸的动态过程。设定仿真计算的初始条件,进行迭代运算。结果表明,随着断路器分闸位置的变化,灭弧室喷口处的压力呈现先增大后减小的变化;断路器处于分闸状态时,喷口上、下游的马赫数最大值分别达到1.60和1.45,并得到自能双动式SF_6断路器灭弧室无载分闸时,灭弧室内压力及马赫数的变化情况。
In this study,the simulation of the flow field in the arc extinguishing chamber of self-energy double action SF_6 circuit breaker was simulated and analyzed using the arc extinguishing chamber of 252 k V self-energy double action SF_6 circuit breaker as the research object. Using the two dimensional N-S( Navier-Stokes) equation combined with the air flow field governing equations,the computational domain was divided into two regions by the moving grid technique. According to the stroke curve of the circuit breaker,and the dynamic change of the grid controlled by the self-made program,dynamic process of the breaker was realized. Then the initial conditions of the simulation calculation were set,and the iterative calculation carried out. the arc chamber nozzle pressure changes from increase to decrease with the changing positions of the circuit breaker switch,the maximum values of the up and downstream Mach distributions at the open position of the circuit breaker are 1. 6 and 1. 45 respectively,and the non-load switching pressure and Mach number changes of arc-distinguishing pressure of the self-energy double-action SF_6 circuit breaker is acquired.
In this study,the simulation of the flow field in the arc extinguishing chamber of self-energy double action SF_6 circuit breaker was simulated and analyzed using the arc extinguishing chamber of 252 k V self-energy double action SF_6 circuit breaker as the research object. Using the two dimensional N-S( Navier-Stokes) equation combined with the air flow field governing equations,the computational domain was divided into two regions by the moving grid technique. According to the stroke curve of the circuit breaker,and the dynamic change of the grid controlled by the self-made program,dynamic process of the breaker was realized. Then the initial conditions of the simulation calculation were set,and the iterative calculation carried out. the arc chamber nozzle pressure changes from increase to decrease with the changing positions of the circuit breaker switch,the maximum values of the up and downstream Mach distributions at the open position of the circuit breaker are 1. 6 and 1. 45 respectively,and the non-load switching pressure and Mach number changes of arc-distinguishing pressure of the self-energy double-action SF_6 circuit breaker is acquired.
引文
[1]李小滨,王其平.SF6压气式灭弧室冷态气流场与介质恢复强度计算[J].西安交通大学学报,1996,30(12):1-7.
[2]金立军,刘卫东,钱家骊,等.SF6断路器无载分闸灭弧室气流场控制的研究[J].高电压技术,2001,27(3):75-80.
[3]林莘,狄谦,钟建英.PHOENICS在SF6断路器气流场计算中的应用[J].华通技术,2006(2):1-5.
[4]BINI R,MAHDIZADEH N,SEEGER M,et al.Measurements and simulation of t he dielectric recovery in a SF6circuit breaker[C]//Proceeding of the 17th International Conference on Gas Discharges and their Applications.Cardiff:IEEE,2008:113-116.
[5]王连鹏,王尔智,刘海峰,等.SF6断路器空载介质恢复特性数值模拟中的耦合计算方法[J].电工技术学报,2007,22(6):59-64.
[6]曹云东,刘阳,刘晓明,等.不同旋气槽数对SF6断路器三维气流场影响[J].电工技术学报,2010,25(9):74-79.
[7]姜旭,贾申利,李兴文,等.基于真实气体模型的SF6断路器中冷态气流场特性的仿真分析[J].中国电机工程学报,2012,32(7):167-173.
[2]金立军,刘卫东,钱家骊,等.SF6断路器无载分闸灭弧室气流场控制的研究[J].高电压技术,2001,27(3):75-80.
[3]林莘,狄谦,钟建英.PHOENICS在SF6断路器气流场计算中的应用[J].华通技术,2006(2):1-5.
[4]BINI R,MAHDIZADEH N,SEEGER M,et al.Measurements and simulation of t he dielectric recovery in a SF6circuit breaker[C]//Proceeding of the 17th International Conference on Gas Discharges and their Applications.Cardiff:IEEE,2008:113-116.
[5]王连鹏,王尔智,刘海峰,等.SF6断路器空载介质恢复特性数值模拟中的耦合计算方法[J].电工技术学报,2007,22(6):59-64.
[6]曹云东,刘阳,刘晓明,等.不同旋气槽数对SF6断路器三维气流场影响[J].电工技术学报,2010,25(9):74-79.
[7]姜旭,贾申利,李兴文,等.基于真实气体模型的SF6断路器中冷态气流场特性的仿真分析[J].中国电机工程学报,2012,32(7):167-173.