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Based on the first law of thermodynamics and the law of hydrokinetics by this paper, the mathematic model of the pressure characteristic in different nozzle throat dimensions is established for the 252 kV SF6 circuit breaker, and the pressure characteristic curve of the arc-extinguishing chamber can be obtained through computation. In addition, the result of the pressure characteristic in different...
A new method combing improved total variation diminish scheme (TVD) with finite volume method (FVM) has been applied for calculating the N - S and K - epsiv equation of flow field in SF6 circuit breaker under cold gas breaking. In calculating, the influence of structure parameter on the interrupting performance is taken into consideration. Through the computation and analysis of dielectric recovery...
A 3D electric field mathematical model of the arc-quenching chamber in an 800 kV 2-break extra high voltage SF6 circuit breaker (EHV SF6 CB) has been established and the finite element method (FEM) has been applied to calculate the electric field in the arc-quenching chamber. In computing, multi-dielectrics (such as: air, porcelain casing, PTFE nozzle, SF6 gas) have been taken into consideration....
A novel combined improved total variation diminish scheme (TVD) with finite volume method (FVM) has been proposed and applied for calculating the N-S and K-epsi equation of flow field in SF6 circuit breaker under no-load breaking in this paper. And during the computing, the influence of actual nozzle structure is taken into consideration. Through the computation and analysis of combined electric field...
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