Global sample synchronization trigger

Synchronization measurement is very useful for power systems on phase measurement, fault location detection and others. This paper describes the concept of a frequency generator module to be used on synchronized acquisition systems. The frequency generator is modeled using a Numeric Controlled Oscillator (NCO) and a PI controller feeding back with phase error of one pulse per second (1-pps) output. The synchronization uses 1-pps from a GNSS as a reference for the synchronization system.