This paper studies the numerical deformation that time-domain integration (TDI) methods introduce to the shape of the coupling between the dynamic modes and variables of power system models. To this aim, we employ a small-signal stability analysis (SSSA)-based framework where such mode-shape deformation is efficiently identified by comparing the modal participation factors (PFs) of the power system model with the PFs of the discrete-time system that is derived from the application of the TDI method. The proposed approach is illustrated for TDI methods commonly used in dynamic power system calculations.
翻译：本文研究了时域积分（TDI）方法对电力系统模型动态模态和变量耦合形状引入的数值形变。为此，我们采用基于小信号稳定性分析（SSSA）的框架，通过比较动力系统模型的模态参与因子（PF）和从应用TDI方法推导出的离散时间系统的PF来高效识别这种模态形状形变。提出的方法是针对动态电力系统计算中常用的TDI方法进行说明的。
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