Investigation on chemically non-equilibrium arc behaviors of different gas media during arc decay phase in a model circuit breaker
Investigation on chemically non-equilibrium arc behaviors of different gas media during arc decay phase in a model circuit breaker
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模型断路器电弧衰减阶段不同气体介质化学非平衡电弧行为的研究
DOI：
10.1088/1361-6463/aaf51f
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Rong Mingzhe
中科院分区：
文献类型：
--
作者：
Sun Hao;Wu Yi;Tanaka Yasunori;Tomita Kentaro;Rong Mingzhe
基于非化学平衡(Non-CE)模型，研究了断路器内空气、氮气和氧气等不同气体介质在断路器零电流期间的电弧行为。比较了非CE模型和局部热平衡(LTE)模型在衰变阶段的电弧行为。在LTE模型中，由于空气的热力学性质和输运性质与氮气非常相似，因此结果表明，这两种气体中的电弧行为非常相似。相反，非CE模型的结果表明，空气中N和O元素的存在导致了不同的反应过程，从而导致了空气的电弧行为与氮气的不同。结果表明，在电流过零过程中，反应过程对电弧的衰减行为有很大影响，这在对流LTE模型中是不能考虑的。因此，非CE模型对于预测电弧衰减阶段的电弧行为是非常重要的，激光在不同气体介质中的汤姆逊散射进一步证实了非CE模型的有效性。
The arc behaviors of different gas media, including air, N 2 and O 2, during the current-zero period in the circuit breaker were investigated based on a non-chemically equilibrium (non-CE) model. The arc behaviors during the decay phase by the non-CE model were compared with those by the local thermally equilibrium (LTE) model. In the LTE model, since the thermodynamic and transport properties of air are quite similar to those of N 2, the results indicate that the arc behaviors in these two gases are quite similar. On the contrary, the results by the non-CE model indicate that the arc behaviors of the air could be quite different from those of N 2, which is caused by the different reaction processes due to the existence of both the N and O element in the air. It can be concluded that during the current-zero, the reaction process greatly influences the arc decaying behaviors, which cannot be considered in the convectional LTE model. Therefore, the non-CE model is very important to predict the arc behavior during the arc decay phase, and the validity of the non-CE model was further confirmed by the laser Thomson scattering in different gas media.