A digital relay algorithm for Ethernet-based data transfer

Recent developments in data packets based high speed digital communications have opened the door for new types of applications in power system protection and control. The main obstacle in adopting Ethernet-based communications was represented by the deterministic data transfer characteristic of these networks. With baud rates in the gigabyte per second range, the industry has started adopting the Ethernet based networks as a viable alternative to synchronous communications, not only because of their lower cost. This paper presents the characteristics required from a digital relay algorithm to be able to work with data streams arriving across data packets based networks. The proposed solution is tested using a modified adaptive least-square-error algorithm confirming the viability of real-time sample stream transmission over asynchronous media.