能量流电弧模型及SF6断路器在短路开断下的应用研究

基于高压SF6断路器开断短路电流时电弧形态与特性是决定开断特性重要因素这一事实，提出并建立一种新型电弧模型——能量流电弧模型。建模中充分考虑在整个开断过程中电流的变化、气流参数的改变对电弧形态的影响及电弧导致高温气体对整个气流场的相互影响。将此模型与气流场求解的N-S方程组相耦合并进行求解，较好地反映了气流场与电弧间相互作用。计算结果证明，该模型可较好反映灭弧室内能量流动、变化及发展规律。

ENERGY FLOW ARC MODELLING AND APPLIED INVESTIGATION IN SHORT CIRCUIT INTERRUPTING FOR SF6 CIRCUIT BREAKER

According to the fact that, the interrupting performance of SF6 circuit breaker is mainly determined by the form and characteristics of the arc under the short circuit breaking, a novel energy flow arc model is presented. Moreover, the influences of current variation and gas flow parameters on the arc are taken into consideration in the arc modeling. Furthermore, the combined energy flow arc model and N-S equation have been coupling solved. Calculation results show that the interaction of arc and gas flow has been clearly reflected and the variation and development of energy flow in the interrupter have been fairly simulated.