本文首先根据系统发生三相对称短路时的短路电流，给出了三相矩形母线短路电动力的解析表达式。
The expression for short-circuit electrodynamic force of rectangular bus bars on the basis of the calculation of three-phase symmetry short-circuit current was fi.
本文主要论述了电力系统中母线上发生三相对称短路时，其动稳定和热稳定的校验问题。
This paper discusses the short-circuit verifying of wires in dynamic stability and heat withstand while the wires are chosen in the design of power system.
对单机无穷大母线系统进行了公式推导和仿真验证，从理论上探讨了多机系统的三相短路故障临界切除时间求解方法。
The formulae for SMIS are derived and verified by case simulation, the solution of critical clearing time (CCT) of three-phase short fault in MMS is theoretically discussed.
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