中文摘要：

高压断路器触头部位因电接触现象而产生的热量是热分析q-的关键问题。然而。作为一种传统并常用的接触电阻模型，导电桥结构在模拟电接触时参数的准确获取存在一定困难．且不易使用在高压断路器复杂的多触指结构中，因此笔者提出了一种新的接触电阻建模处理方法。新方法不再建立类似于导电桥的宏观几何结构，而是将两侧接触面上的部分面积耦合在一起，使得电流仅可以从耦合面内流过．通过控制耦合面积值即可实现电流收缩效果，模拟出适当的接触电阻值。在此基础上，笔者通过仿真结果与实际值的对比及进一步研究，证明了接触面积耦合法的有效性。对今后高压断路器触头模型的处理具有一定的参考意义。

英文摘要：

The key issue in thermal analysis of high voltage circuit breakers is the heat due to electric contact. However, as a conventional contact resistance model, the contact bridge structure is difficult in obtaining accurate parameters and is not feasible for the complex multi-contact structure of a high-voltage circuit breaker. In this paper, a novel contact resistance modeling method is proposed. In the method, the establishment of macro geometrical structure like contact bridge is given up, alternatively, some areas on both contact surfaces are coupled together to localize the current in the coupled area. Thus, the shrinking effect of current can be easily achieved via controlling the coupled area and proper contact resistance can be simulated. The validity of the proposed contact area coupling method is proved through the comparison between simulating and real results and further studies. This method may facilitate the process of high-voltage breaker contact model.