双分裂设备线夹短路电流冲击受力分析

Force Analysis of Double Bundle Terminal Connector under Short-Circuit Current Shock

变电站用双分裂设备线夹耐受短路电流的能力,不仅与材质状况有关,更与其结构强度相关。当前,设备线夹在设计制造时未核算短路电流耐受能力,当受到较大短路电流时就可能因结构强度不足而变形或断裂,引发电网故障。针对此问题,从结构受力角度建立模型,分析了压缩型双分裂设备线夹在短路电流引起的电动力冲击作用下的受力状况,提出了设备线夹在设计选型时,应从结构强度方面核算短路电流耐受能力的要求和方法。

： Double bundle terminal connector has been widely used in substations, whose short-circuit current tolerance capability is not only relevant to the material quality, but also to the structural strength. Because the short-circuit current tolerance ability was not taken into adequate consideration during the design and manufacture of terminal connector, the double bundle terminal connector would deform or fracture due to the lack of structural strength under large short-circuit current shock, which may cause power grid failure. In order to solve this problem, the model has been built for the structure stress, so as to analyze the stress carried out on compression-type double bundle terminal connector under electrodynamic force caused by short-circuit current. The requirements and methods were suggested for checking short-circuit current tolerance capability from the aspects of structural strength during the design and manufacture of terminal connector.