Time Synchronization for Ethernet Communication based Line Differential Protection

Abstract: Most of the industrial manufactures and designers of Power Substation Automation ProtectionControl products are under pressure regarding the existing communication architecture ofthe Line Dierential Protection Application. Currently the widely used technologies includeSONET/SDH which are circuit switched networks, that are no longer predominant. They arebeen replaced with Packet Switched Networks everywhere. Moreover dedicated network equipmentis required to be maintained for using SDH/SONET technologies. Hence it is becomingincreasingly hard for the utilities to get access to and maintain the SDH/SONET networks.The main objective of this thesis work is to develop an alternative communication solutionin order to migrate away from these SDH/SONET networks. The project work is done suchthat the requirements for the Line Dierential Protection Communication are carefully analysedand a solution is designed such that it fulls those requirements. Following that the implementationand evaluation of the solution is performed. In the end, a testing of this solutionis also done on a real-time WAN network running the Line Dierential Protection function,in order to verify the working of the solution and study the challenges of a WAN deploymentscenario in future.