Project Director

Kobet, Gary L.

Department Examiner

Craven, Stephen D.; Eltom, Ahmed H.; Ahmed, Raga


Dept. of Electrical Engineering


University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)


The utility network has long relied on Time Division Multiplexing (TDM) such as T1 and Synchronous Optical Network (SONET) as the main channel to transmit and receive data in a communication system. However, TDM technology is aging and its equipment becoming obsolete as vendors transition to Packet-Switched Networks (PSN) to make way for Ethernet-based network communications. Teleprotection is a critical element for a reliable power system as it provides high-speed tripping for faults on the protected line and is applied in various pilot protection schemes. Protection schemes cannot perform at their best without a fast and reliable communication system. The transition from a circuit-switched technology like SONET to a packet-based technology like Multiprotocol Label Switching-Transport Profile (MPLS-TP) has caused reservations for protection engineers as they express their concerns for lacking guaranteed 100% availability and potential latency. This paper will address this issue and the consistent test results at the Tennessee Valley Authority (TVA)'s lab have proven to satisfy the communication requirements in a teleprotection system. Teleprotection traffics make to its destination in order in microseconds, the symmetrical delay is less than 1µs, and especially the recovery from a failure occurs under 50ms (3 cycles). The results reassure the protection engineers that the Ethernet migration is necessary yet provides a better performance compared to the legacy system.


I am grateful to my thesis director Professor Gary Kobet for his expertise in Teleprotection and the continuous motivations throughout this thesis process. My sincere gratitude to my thesis advisor Dr. Stephen Craven for his expertise in Telecommunications and his tremendous patience as well as brilliant ideas in the lab. I also would like to thank my thesis committees Dr. Ahmed Eltom and Dr. Raga Ahmed for their times, comments and encouragements. My sincere thanks to the Telecom Planning group who provided me an opportunity to join their team as an intern as well as my uncle Tuan for his knowledge in Protection and Control, and my colleagues for their wonderful collaborations.


B. S.; An honors thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Bachelor of Science.




Telecommunication -- Safety measures; Electric power systems -- Protection


SONET; MPLS; Packet-switching; Network communication; Pilot protection; Tennessee Valley Authority

Document Type



56 leaves







Date Available