Updates & Events
Info for members about events, updates, and results.
2026 Engagement Opportunities
| Meeting | Date | Location | Contact | Information |
|---|---|---|---|---|
| Transmission and Substations Task Force Meeting | February 9-12 | Charlotte, NC, EPRI Offices | Tom Zhao | Meeting Information |
| EPRI Kick Off Webcast: High Voltage Direct Current Converter Stations and FACTS (P35.019, P36.008, P37.116) | March 6, 11:00 am - 12:00 pm ET | Webcast | Ram adapa | More information, coming soon |
| Transmission & Substations Advisory Meeting | March 30 - April 1 | Charlotte, NC, EPRI Offices | Tom Zhao | Meeting Information |
| EPRI R&D Project Update Webcast: Underground Transmission (P36) | 6/9/2026 - 1 to 2:30 PM ET | Webcast | Tom Zhao | More information, coming soon |
| Program 36 2026 Research Portfolio Rollout #1 | June 16, 1:00-2:30 pm ET | Webcast | Tom Zhao | More information, coming soon |
| EPRI R&D Project Update Webcast: High Voltage Direct Current Converter Stations and FACTS (P35.019, P36.008, P37.116) | June 5, 11:00 am -12:00 pm ET | Webcast | Ram adapa | More information, coming soon |
| Program 36 2026 Research Portfolio Rollout #2 | August 4, 1:00-2:30 pm ET | Webcast | Tom Zhao | More information, coming soon |
| EPRI End of Year Webcast: High Voltage Direct Current Converter Stations and FACTS (P35.019, P36.008, P37.116) | November 20, 11:00 am -12:00 pm ET | Webcast | Ram adapa | More information, coming soon |
2025 Engagement Opportunities
| Meeting | Scheduled Date | Location | Information |
|---|---|---|---|
| Underground Transmission Task Force - March 2025 | March 10-13 (In Person) : March 17-20 (Virtual) | Charlotte, NC | Meeting Materials |
| Underground Transmission (Program 36) New Supplemental Launch Webcast | March 31 1:00pm - 2:00pm ET | Webcast | Meeting Materials |
| EPRI R&D Project Update Webcast: Underground Transmission (P36) | June 10 1:00pm - 2:30pm ET | Webcast | Meeting Materials |
| Underground Transmission 2025 ARP Rollout #1 | June 17 1:00pm - 2:00pm ET | Webcast | Meeting Materials |
| EPRI R&D Project Update Webcast: High Voltage Direct Current Converter Stations and FACTS (P35.019, P36.008, P37.116) | June 27 11:00am - 12:00pm ET | Webcast | Meeting Materials |
| Underground Transmission 2025 ARP Rollout #2 | August 5 1:00pm - 2:30pm ET | Webcast | Meeting Materials |
| Underground Transmission Task Force | August 18-22 (In Person)/August 25-29 (Virtual) | Charlotte, NC | Meeting Materials |
| EPRI End of Year Webcast: High Voltage Direct Current Converter Stations and FACTS (P35.019, P36.008, P37.116) | November 21 8:00am - 9:00am PT | Webcast |
2026 Anticipated Deliverables
| Deliverable | Description | Date |
|---|---|---|
| EPRI High-Voltage, Direct Current (HVDC) Transmission Reference Book (The Olive Book) – 2026 Edition (report) | The EPRI Olive Book is a state-of-the-art guidebook and comprehensive source of technical information for designing, building, operating, and extending the life of HVDC transmission systems. The project team continuously updates the Olive Book. | December 2026 |
| Underground Transmission Workstation—DC Ampacity (software and report) | This task aims to enhance the stand-alone Underground Transmission Workstation (UTW) DC ampacity calculation software tool for HVDC transmission cables. The calculation procedures are based on previous EPRI studies. | December 2026 |
| Guide for High-Voltage Direct Current (HVDC) Transmission Cable Ratings – 2026 Update (report) | This report provides calculation procedures for continuous ratings of buried land or submarine HVDC transmission cables. | December 2026 |
| Underground Transmission Vault Inspection Using Robotic Techniques (report) | To improve workersafety and reduce circuit outage requirements, this task continues the investigation of underground transmission vault inspection techniques. Concepts and prototype robotic techniques have been demonstrated in EPRI laboratories and at member utility sites. | December 2026 |
| Off-Line Fault Location Systems for Transmission AC and DC Cables (report) | Off-line fault location is critical for determining the location of a cable fault. This task provides results of a study in applying and demonstrating previously developed fault location technology for long HVDC cables to HVAC cables. | December 2026 |
| Guide on HVAC and HVDC Array and Export Power Cables for Offshore Wind Farms – 2026 Edition (report) | This task is a multi-year effort addressing technical challenges in exporting a large amount of energy from offshore wind collectors to land-based grid connections. Both HVAC and HVDC technologies are investigated, including best practices and the state of technology from design to operation and maintenance. | December 2026 |
2025 Deliverables
| Product ID | Product Name | Item Type |
|---|---|---|
| 3002032880 | EPRI High Voltage Direct Current (HVDC) Transmission Reference Book (The Olive Book) – 2025 Edition |
Tech Update |
| 3002032881 | Underground Transmission Workstation—DC Ampacity (UTW DC) V4.3 |
Software |
| 3002032882 | Underground Transmission Workstation—DC Ampacity (UTW DC) V4.3 (Beta) |
Pre-Software |
| 3002032883 | Guide for High-Voltage Direct Current (HVDC) Transmission Cable Ratings - 2025 Update |
Tech Update |
| 3002032884 | Off-Line Fault Location Systems for Transmission AC and DC Transmission Cables |
Tech Update |
| 3002032887 | Guide on HVAC and HVDC Array and Export Power Cables for Offshore Wind Farms - 2025 Edition |
Tech Update |