电弧等离子体粒子组分计算方法的研究

Study of Method for Calculating Composition of Arc Plasma Particles

绝缘气体在电力开关设备中承担重要作用。研究气体分子在断路器中电弧等离子体组分对于进一步仿真研究其绝缘和灭弧性能有重要意义。基于局部热力学平衡态假设给出了计算电弧等离子体的两种方法(Gibbs自由能最小化和质量作用定律),从计算推导以及计算结果上作对比。结果表明:Gibbs自由能最小化求解等离子体组分时,需要给定等离子体中可能存在的所有粒子种类,进而求解一个优化问题;质量作用定律需要从反应机理上给出电弧物理过程中所有的化学反应过程,求解方程的解。

Insulating gas plays an important role in the high voltage equipment of power switching.It is important to study the arc plasma composition of gas molecules in the circuit breaker for further simulation of its insulation and arc extinguishing performance.Therefore,in this paper,based on the local thermodynamic equilibrium state hypothesis,two calculations of the arc plasma(Gibbs free energy minimum and mass action law)methods are given from the calculation derivation and the comparison of the calculation results.The results show that when the Gibbs free energy minimization is used to solve the plasma composition,it is necessary to give all the kinds of particles that may exist in the plasma and to solve an optimization problem.The law of mass action needs to give all the chemical reaction process in arc physical process to solve the equation.