Time Synchronization Sensitivity in SV-based PMU Consistency Assessment

Modern power systems are rapidly transitioning towards a fully digital substation paradigm. Based on the IEC 61850, common communication protocol between different intelligent electronic devices (IEDs) promises significant enhancement in terms of efficiency and interoperability. In this context, synchronization represents crucial aspect as it allows us to rigorously compare measurements taken at same time locations. paper, we consider measurement chain for synchrophasor estimation based inputs: an instrument transformer, stand-alone merging unit (SAMU) phasor (PMU). Both SAMU PMU equipped with independent sources. case loses its synchronization, final result would be considered invalid until complete restoration status. view longer continuity operation, paper proposes alternative approach evaluate Time Quality real-time. This continuing monitoring control operations, such state fault detection, even presence temporary loss synchronization. A characterization, both simulated experimental conditions, proves potential reliability proposed approach. test case, come-back within sufficient quality is correctly detected less than 200 s, while waiting full reference cost several minutes.