变电站设计中短路电流的计算与分析

变电所设计中,为了电气设备、载流导体的选择、继电保护、自动化装置的整定、限制短路电流措施确定等目的,往往都需要先进行短路电流的计算。准确地进行短路电流计算就能根据变电站电力系统的实际情况合理地确定限制短路电流的方案,或者限制某种运行方式的出现,得到既可靠又经济的主接线方案。短路电流主要包含有三相短路电流、两相短路电流和单相短路电流。本论文通过某工厂变电所的设计,详细地介绍了短路电流的计算原则,得出了一种切实可行的短路电流计算方法。

Calculation and analysis of short-circuit current in substation

Selection of electrical equipment and carrying conductors,setting of protection relays,automation instrument,limit of short-circuit current and so on,all the above need to calculate short-circuit current.Accurate to short-circuit current calculation can confirm the restriction on short-circuit current according to the actual situation of substation,and limit some special run mode,then it can obtain stable performance as well as good profit in the electric main wiring plan.short-circuit current contents three types,three-phase short-circuit,two-phase short-circuit and one-phase short-circuit.According to the construction of substation,this paper introduce the principle of calculation about short-circuit,achieve a way to calculate short-circuit current in the design of substation.