Comprehensive validation of packet-based communications for future energy systems

This paper reports on the use of modern packet-based communications technologies to dependably support system-critical services. Such services include current differential protection, secure time distribution, and coordinated wide-area control applications. The challenges and subtleties encountered in the migration to packet networks will be explained, using evidence from extensive validation tests at three laboratories. Based on this experience, the paper therefore will provide a clear, comprehensive, and practical guide to the application of packet technologies and networks for power system applications. In particular, the paper examines integrating legacy protection devices, the impact of long-range communications using microwave transmission, and future applications involving native packet-based devices such as Phasor Measurement Units (PMUs), through a demonstration of fast-acting frequency control.