Development and Experimental Validation of a Super-Synchronized Phasor Measurement Unit

摘要

Phasor Measurement Units (PMUs) are leading the way towards advanced monitoring, control and protection applications in power systems. In order to work properly, they rely on a precise time synchronization architecture. Currently, the synchronization accuracy achieved is in the order of one microsecond.The utilization of PMUs in medium and low voltage systems requires nano-second scale time synchronization accuracy, due to the lower active power flows and thus to the lower phase angle differences between two buses of a power system.To face this issue, this paper advocates the role of supersynchronized PMUs that are based on a novel time and frequency transfer algorithm developed by Thales Alenia Space (Synchronet). As demonstrated by experimental activities developed on a real case study, the adoption of this new paradigm allows PMUs to reach nano-second scale synchronization accuracy, hence representing an effective solution for time-synchronization in modern smart grids.