提出了一种基于综合相量幅值和相位变化规律实时测量电力系统振荡中振荡频率及瞬时频率的算法，利用三相电流经相应变换获得综合相量。
An algorithm based on the magnitude and phase Angle of the generalized phasor to measure instantaneous frequency and swing frequency while the power swing occurred is presented.
不过，在分析交流电路时，重要的是不仅要考虑相量的幅值，还要考虑相量的方向。
However, when analyzing AC circuit, it is important to consider the magnitude as well as the direction of phasor quantities.
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