On the Use of IEEE 1588 in Existing IEC 61850-Based SASs: Current Behavior and Future Challenges

摘要: The International Electrotechnical Commission (IEC) 61850 standard describes the communication inside substation automation system (SAS) setting base for new interoperating devices that share information using Ethernet network infrastructure. More recently, request of time synchronization among SAS components timestamping critical events or synchrophasor measurement has generated a very high interest in IEC working group distributed protocols like IEEE 1588. This paper analyzes current situation, matching different implementations 1588, and their respective accuracy, with requirements typical applications: from millisecond accuracy required by fault recorder application to microsecond sampled values (SV). main focus this is on integration 1588 real already existing systems, goal performance comparison architectures. For these reasons, experimental tests have been carried out infrastructure [redundant gigabit optical fiber managed rapid spanning tree protocol (RSTP)]. results show that, under ideal conditions, can achieve slightly worse (80 ns) than legacy IRIG-B systems (15 ns). However, makes possible great cabling reduction simplified maintenance when directly transferred bus. On other hand, experiments highlight nodes connected through RSTP infrastructure, which does not support messages, lose case traffic reconfiguration network. Therefore, over station bus basically tradeoff between installation costs since it requires replacement installed In last part, analyses challenges next generation combine same plants implementation high-availability based 62439. Since lifetime an more ten years adoption technologies takes several years, some solutions introduce guaranteeing compatibility analyzed, too. instance, adaptation block (when attached network) reconstructs interface signals (e.g., signals) traditional bay proposed.