开关柜内部电弧故障会引起设备严重破坏和人员伤亡,对其进行仿真分析可为开发耐内部电弧故障的成套设备提供科学依据,从而缩短开发周期,降低开发成本.在建立开关柜内部电弧故障数学模型的基础上,采用标准计算法对电弧故障导致的压力上升进行了仿真计算.并制作实验模型进行了一系列试验,研究故障电流、压力释放孔等因素对压力上升的影响.比较测量值和计算值,两者符合得较好,本文的仿真软件可以用来指导产品开发.%The internal arcing faults in the metal-enclosed switchgear may cause serious damage to the equipment and fatal injury to personnel. To simulate the fault arcs based on appropriate calculation methods can not only shorten the development period of arc resistant switchgear, but also save the development cost. The mathematical model to simulate and compute the pressure rise due to the internal arcing fault is described in this paper. The effects on pressure rise resulting from some factors such as fault currents and the size of pressure release vents are investigated via a test model and tests. The results of computation and of measurement during the tests are compared and agreed well. Therefore, this simulation software is helpful to the design of new arc-resistant switchgears. For instance, if the mechanical strength of an enclosure is known by test or by calculation using FEM software such as ANSYS, then the minimum area of the pressure relief vent or the maximum fault current which the enclosure could withstand can be achieved by using our simulation software with short calculation time. The method is also described in this paper.
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