부산대학교 도서관

This paper is presenting how teleprotection applications via packet switched wide area networks can be implemented guaranteeing required application specific performance parameters. The following different approaches are analyzed for differential protection: a. ITU-T compliant standard circuit emulation (CE) using SAToP/ CESoPSN. b. A novel approach of CE technology, using explicit clocks, developed for protection signal transmission via packet switched wide area networks For distance protection, the following approach is assessed: c. Applying an interworking function (IWF) based on a packet generator The analysis is completed with supporting results from the field, in addition to lab tests of the specific solutions (b+c). Tests not only include the normal operation of the wide area network but also stress tests for various scenarios like traffic overload conditions, excessive jitter and wander, delay asymmetries, packet loss and protection switching of communication paths. The tests proved the capabilities and superior performance of the specific solution (b+c) compared to other solutions.