Wavelet packets with the advantage of time frequency zoom is used in this paper to decompose the post fault transient electrical quantities by the proper frequency span.
应用在时频空间皆具有良好聚焦特性的小波包，以适当频率带宽，对故障后暂态电气量进行分解。
The restriction of transient voltage dip is a constraint on post fault power system.
暂态电压跌落限制可以考虑为对故障后电力系统的一个约束。
A direct method considering transient voltage dip is proposed to calculate the critical clearing time (CCT) ensuring that voltages of post fault power system are higher than limit.
提出了一种考虑暂态电压跌落限制的直接法，快速求取保证故障后电力系统电压高于限值的故障临界清除时间(CCT)。
The method performs active power perturbation analysis respectively on the stable equilibrium point of pre-fault system, the trajectory of fault-on system and transient stability of post-fault system.
应用暂态能量函数分析给出了注入空间上的实用动态安全判据，以此来量化暂态稳定性指标，从而实现对事故后系统的有功功率小扰动分析。
The method performs active power perturbation analysis respectively on the stable equilibrium point of pre-fault system, the trajectory of fault-on system and transient stability of post-fault system.
应用暂态能量函数分析给出了注入空间上的实用动态安全判据，以此来量化暂态稳定性指标，从而实现对事故后系统的有功功率小扰动分析。
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