Dynamic Line Rating Systems for Transmission Lines

Through the U.S. Department of Energy’s Smart Grid Demonstration Program (SGDP), the New York Power Authority (NYPA) and Oncor Electric Delivery Co. (Oncor) demonstrated dynamic line rating (DLR) technologies to increase the efficient use of the existing transmission network, mitigate transmission congestion, and develop best pract ices for applying DLR systems.

Both demonstration projects confirmed the presence of real - time capacity above the static rating, in most instances, with up to 25% additional usable capacity made available for system operations. NYPA worked with the Electric Power Research Institute (EPRI) using technologies and approaches that EPRI developed, while Oncor deployed Nexans’ commercially available conductor tension - monitoring CAT - 1 System.

Key outcomes of the two SGDP projects include NYPA’s assessment of the benefits and disadvantages of DLR technologies and Oncor’s demonstration that dynamic ratings can be automatically applied in real - time system operations. The projects revealed opportunities to enhance future DLR deployments by ensuring the reliability of DLR data, preemptively addressing cybersecurity concerns, integrating dyn amic ratings into system operations, and verifying the financial benefits of DLR systems...(Read more of DOE’s report: Dynamic Line Rating Systems for Transmission Line...)