Demonstration and analysis of IP/MPLS communications for delivering power system protection solutions using IEEE C37.94, IEC 61850 Sampled Values, and IEC 61850 GOOSE protocols

摘要

Communications is becoming increasingly important for power system applications. Internet Protocol/Multiprotocol Label Switching (IP/MPLS) has the potential to significantly improve the performance and efficiency of power system communications compared with legacy time-division multiplexing (TDM) solutions, without sacrificing the reliability of safety-critical systems such as protection. This paper reports on the requirements and performance of the conventional IEEE C37.94 and emerging IEC 61850 protocols for delivering current differential protection over an IP/MPLS network. Several configurations and parameters are investigated, and the paper highlights the key differences. A number of trade-offs must be carefully observed when specifying IEEE C37.94 parameters to meet the latency and bandwidth requirements for each protection application. IEC 61850 Sampled Values requires greater bandwidth than IEEE C37.94, but the potential for improved and faster acting protection - such as for backup intertrip schemes, as demonstrated the paper - may justify its use for wide-area protection.