Distributed measurement system for the assesment of IEC 61850 transfer time in smart grid

摘要

The rise of Smart Grids based on IEC61850 standard requires specialized measurement systems in order to characterize the main performance parameters. In this paper, a new distributed measurement system for the estimation of IEC61850 Transfer Time over Smart Grid communication infrastructure is introduced. The structure of a possible implementation, based on specialized sampling devices coordinated by a virtual instrument, is described in details. The synchronization uncertainty of the distributed system is below 30ns, (thanks to the use of IEE1588 Precision Time Protocol), while the measurement extended uncertainty is below 100ns. A test case is used to demonstrate the system feasibility and the effectiveness of the obtained results: the evaluation of sample IEC61850 devices highlighted their weak points, allowing for a correct classification of their Transfer Time Class (according to IEC61850).