短路电流衰减影响发电机过负荷保护的仿真分析

Simulation Analysis of Short-circuit Current Attenuation Affecting Generator Overload Protection

结合发电机外部故障时提供的短路电流衰减特性,对衰减过程进行理论计算和仿真,对发电机定子绕组过负荷保护的动作行为进行分析,认为根据《大型发电机变压器继电保护整定计算导则》整定的发电机定子绕组过负荷保护,无法承担发电机变压器组后备保护的作用。

Considering the attenuation property of the short circuit current from generator external fault, the paper takes research and simulation on the characteristic of the attenuation course, and does analysis on the theory of the generator stator overload relay protection, gives the view that the protection under the setting standard cannot act as the backup function to the generator-transformer unit.