采用集总参数模型，推导了脉冲堆燃料元件瞬态温度场的计算公式；
The formula for calculating transient temperature field in pulse reactor fuel element is derived with lumped parameter models.
采用常规的电力系统元件模型和参数进行数值仿真所得的频率变化曲线与实测曲线偏差较大。
As for the numerical simulation by traditional power system component models and parameters, the obtained dynamic frequency curves evidently diverge from measured ones.
并讨论了当元件参数满足某些特定条件时，模型的化简问题。
When the parameters of components and system meet a certain condition, the models of load sensing system are simplified.
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