P35.013: Overhead Line Ratings and Increased Power Flow
Past EPRI Work on Topic
| Product ID | Title | Description | Published Date |
|---|---|---|---|
| ---- | 2025DLR report | This report provides a technical deep dive into how DLR sensors and sensorless DLR operate. Worked examples are provided to show error sensitivity and the precision needed to result in suitably accurate ratings. | December 2025 |
| ---- | Summary of Recent Increased Transmission Line Utilization Projects: 69 kV and Above | This report captures case studies where utilities have uprated lines or increased the utilization of a given corridor. It includes reconductoring, retensioning, structure raising, voltage upgrades, DLR, and more. The pros and cons of each approach are provided to help utilities identify which methods will best suit their particular needs. | December 2025 |
| 3002029601 | EPRI Research Facilitating Adoption of FERC Order 881: AAR, Seasonal, Emergency, Forecasted Ratings and Concerns for Next Limiting Elements | This report compiles five years of research on best practices for adoption of new ratings methods as outlined in FERC Order 881 within the United States. | December 2024 |
| 3002029602 | Understanding Historical Trends with Climate Events and Their Impact on Transmission Ampacity | This report expands past research to define how much capacity would be needed from DLR, AAR, or other upgrades to reduce congestion when responding to large outages or demand spikes. | December 2024 |
| 3002030266 | Cost-Effective Measures to Resolve Under-Clearance Spans | This report compares the cost, complexity, and time to complete for multiple technologies that increase transmission capacity on clearance limited lines, including guidance on reducing errors in clearance models based on LiDAR and UAS data. | December 2024 |
| 3002027093 | Improved Methods Identifying At-risk and Wind Sheltered Spans | This report addresses the knowledge gaps around identifying at-risk spans within heavily loaded circuits. The number and location of at-risk spans determine where and how many DLR sites would be needed to safely and accurately rate a circuit. | November 2023 |