开关柜耐受最大冲击载荷的冲击动力学研究

RESEARCH OF SHOCK DYNAMICS ON WITHSTANDING THE MAXIMAL SHOCK LOAD IN SWITCHGEAR ASSEMBLIES

开关柜内部电弧故障所引起的压力冲击波时间短、峰值高,是一种脉冲式冲击载荷。为了估算开关柜壳体所能承受的最大冲击载荷,采用大型有限元计算软件 ANSYS 进行了分析和计算。利用其结果,再用自行编写的计算压力上升的仿真软件进行计算,估算出开关柜能耐受的最大故障电流及各个小室的最小压力释放孔面积,从而为开发新型的耐电弧故障开关柜提供了有用的参考依据。

The pressure rise inside switchgear assemblies due to internal arcing faults will cause a pressure shock wave with the feature such as short duration and high peak value, so it is a pulse shock load. In order to estimate the maximal shock load which could be withstood by the enclosure of switchgear, the FEM software ANSYS was introduced to analyze and calculate the shock load. With the calculation results, the pressure-rise stimulation software was used to calculate the maximal. fault current which could be withstood by switchgear and minial area of pressure-relief vents of each compartment of switchgear. The calculation results can be a helpful reference basis for the development of new arc-resistant switchgear.