Following it, the synchronization of time and frequence can be decoupled.Using the timetag at the front of the data window or at the middle or at the end can be chosen freely.

• 本文提出了一种可以实现时间同步和频率同步的解耦，同时达到首中末点三种时标同步方式可选、同步周期可选等目标的广域相量测量实现方法。