Teleprotection over SONET based on IEC 61850

The use of IEC 61850 standard is strongly based in ethernet networks. In addition to provide a series of technical standardization the standard allows data integration among different bays protection devices in the same substation. As a result, a significant cost reduction of eletrical substations projects is observed. After the publication of Technical Report 90-1, this communication has been expanded to bays from different substations, allowing for more efficient and safer protection solutions. This article approaches the communication among substations based on IEC 61850-GOOSE via tunneling method with synchronous optical networks. In addition, it presents a study case involving the implementation of a project at Braskem company. The delay found in communicating using GOOSE messages between different substations relays was 4,14ms (95% confidence interval). It shows the use of synchronous optical network attended the teleprotection applications requirements.